Pub Date : 2025-02-01DOI: 10.1016/j.jcou.2025.103018
Lili Wang , Youfu Xia , Yuzhu Ge , Chen Zhang , Xiuquan Xu , Seyed Mohsen Sadeghzadeh
The integration of PrVO4 and dendritic fibrous Bi7O9I3 within nanospaces offers a novel approach to developing bifunctional nanocatalysts (Bi7O9I3/PrVO4 NFs). Utilizing a simple method, this design achieved a uniquely extensive external surface formed through a 3D hierarchical structure. This innovative catalyst displayed exceptional efficiency in synthesizing γ-amino acids from carbon dioxide under environmentally friendly conditions. Additionally, further studies demonstrated the versatility of this catalytic system across a range of substrates. Bi7O9I3/PrVO4 proved to be a highly effective and recyclable accumulator for the synthesis of γ-amino acid from carbon dioxide. Despite the occurrence of diversity, the process was not hindered. The commodities were easily separated from the eco-conscious milieu, and the accelerator was reused manifold times lacking a noticeable decrease in dynamism and specifity.
{"title":"The synthesis of γ-amino acid from carbon dioxide using Bi7O9I3/PrVO4 as a nanocatalyst","authors":"Lili Wang , Youfu Xia , Yuzhu Ge , Chen Zhang , Xiuquan Xu , Seyed Mohsen Sadeghzadeh","doi":"10.1016/j.jcou.2025.103018","DOIUrl":"10.1016/j.jcou.2025.103018","url":null,"abstract":"<div><div>The integration of PrVO<sub>4</sub> and dendritic fibrous Bi<sub>7</sub>O<sub>9</sub>I<sub>3</sub> within nanospaces offers a novel approach to developing bifunctional nanocatalysts (Bi<sub>7</sub>O<sub>9</sub>I<sub>3</sub>/PrVO<sub>4</sub> NFs). Utilizing a simple method, this design achieved a uniquely extensive external surface formed through a 3D hierarchical structure. This innovative catalyst displayed exceptional efficiency in synthesizing γ-amino acids from carbon dioxide under environmentally friendly conditions. Additionally, further studies demonstrated the versatility of this catalytic system across a range of substrates. Bi<sub>7</sub>O<sub>9</sub>I<sub>3</sub>/PrVO<sub>4</sub> proved to be a highly effective and recyclable accumulator for the synthesis of γ-amino acid from carbon dioxide. Despite the occurrence of diversity, the process was not hindered. The commodities were easily separated from the eco-conscious milieu, and the accelerator was reused manifold times lacking a noticeable decrease in dynamism and specifity.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"92 ","pages":"Article 103018"},"PeriodicalIF":7.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.jcou.2025.103036
Yan Xie , Michelle Tiong , Qi Liu, Tong Wu, Wanzhen Xue, Chunkai Wang
Carbon capture, utilization, and storage (CCUS) technology plays a critical role for significantly reducing greenhouse gas emissions. The integrity of the cement sheath in storage wells is essential to secure the subsurface CO2 storage, however, acidic CO2 can erode the cement sheath over time, leading to chemical and mechanical damages of cement, risking CO2 leakage. The advancement of nanotechnology has introduced nanomaterials into cementing operations, enhancing oil well cement durability against storage conditions due to their high surface area and reactivity. To enhance the security of CO2 storage, it is proposed to incorporate self-healing materials into the cement, which autonomously repair microcracks to maintain the cement sheath's sealing integrity. This review firstly discusses the hydration and carbonation processes of in wellbore cement, and evaluates the influences of various nanomaterials on the cement durability. Subsequently, the self-healing mechanisms of such cement is introduced, along with the effects of different materials on the self-healing performance of oil well cement. Finally, by analyzing existing research achievements and issues, the future important research directions are provided.
{"title":"Recent advancements in durable and self-healing oil well cement: A pathway to secure carbon sequestration","authors":"Yan Xie , Michelle Tiong , Qi Liu, Tong Wu, Wanzhen Xue, Chunkai Wang","doi":"10.1016/j.jcou.2025.103036","DOIUrl":"10.1016/j.jcou.2025.103036","url":null,"abstract":"<div><div>Carbon capture, utilization, and storage (CCUS) technology plays a critical role for significantly reducing greenhouse gas emissions. The integrity of the cement sheath in storage wells is essential to secure the subsurface CO<sub>2</sub> storage, however, acidic CO<sub>2</sub> can erode the cement sheath over time, leading to chemical and mechanical damages of cement, risking CO<sub>2</sub> leakage. The advancement of nanotechnology has introduced nanomaterials into cementing operations, enhancing oil well cement durability against storage conditions due to their high surface area and reactivity. To enhance the security of CO<sub>2</sub> storage, it is proposed to incorporate self-healing materials into the cement, which autonomously repair microcracks to maintain the cement sheath's sealing integrity. This review firstly discusses the hydration and carbonation processes of in wellbore cement, and evaluates the influences of various nanomaterials on the cement durability. Subsequently, the self-healing mechanisms of such cement is introduced, along with the effects of different materials on the self-healing performance of oil well cement. Finally, by analyzing existing research achievements and issues, the future important research directions are provided.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"92 ","pages":"Article 103036"},"PeriodicalIF":7.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143310806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.jcou.2025.103033
Urooj Kamran , Nasir Shezad , Soo-Jin Park , Kyong Yop Rhee , Shujie You , Farid Akhtar
Nitrogen-doped porous carbons have been widely explored for CO₂ storage and separation, but expensive precursors and intricate synthetic approaches often limit their practical deployment. Here, we report a facile, one-step, solvent-free method to design nitrogen-doped microporous carbons (SBF-BC-KMx) for efficient CO₂ capture from sugarcane bagasse fibers (SBF) as a low-cost precursor. Melamine and KOH were used as a nitrogen-doping source and an activator, respectively. The specimen (SBF-BC-KM0.5), prepared with optimized melamine loading, possessed efficient textural features, including a specific surface area (SSA) of 1138 m² g⁻¹ , a micropore volume of 0.396 cm³ g⁻¹ , high concentration of ultra-micropores (<0.6 nm) (89 %) and high content of pyrrolic-N functionality (35 %). These properties enhanced the CO₂ capture performance, achieving 244.4 mg g⁻¹ at 273 K, 170.0 mg g⁻¹ at 293 K and 1 bar, and 351.5 mg g⁻¹ at 293 K and 10 bar. The optimized material exhibited a moderate isosteric heat of adsorption and an effective CO₂/N₂ selectivity at 293 K. The high ultra-micropore density significantly boosted CO₂ uptake and maintained stable CO₂ uptake over five adsorption cycles. Overall, this work devoted efforts to sustainable environment, biowaste management, and possible practical applicability of designed adsorbent for CO2 storage.
{"title":"Solvent-free valorization of sugarcane bagasse fibers into nitrogen-doped microporous carbons: Efficient contenders for selective carbon dioxide capture","authors":"Urooj Kamran , Nasir Shezad , Soo-Jin Park , Kyong Yop Rhee , Shujie You , Farid Akhtar","doi":"10.1016/j.jcou.2025.103033","DOIUrl":"10.1016/j.jcou.2025.103033","url":null,"abstract":"<div><div>Nitrogen-doped porous carbons have been widely explored for CO₂ storage and separation, but expensive precursors and intricate synthetic approaches often limit their practical deployment. Here, we report a facile, one-step, solvent-free method to design nitrogen-doped microporous carbons (SBF-BC-KMx) for efficient CO₂ capture from sugarcane bagasse fibers (SBF) as a low-cost precursor. Melamine and KOH were used as a nitrogen-doping source and an activator, respectively. The specimen (SBF-BC-KM0.5), prepared with optimized melamine loading, possessed efficient textural features, including a specific surface area (SSA) of 1138 m² g⁻¹ , a micropore volume of 0.396 cm³ g⁻¹ , high concentration of ultra-micropores (<0.6 nm) (89 %) and high content of pyrrolic-N functionality (35 %). These properties enhanced the CO₂ capture performance, achieving 244.4 mg g⁻¹ at 273 K, 170.0 mg g⁻¹ at 293 K and 1 bar, and 351.5 mg g⁻¹ at 293 K and 10 bar. The optimized material exhibited a moderate isosteric heat of adsorption and an effective CO₂/N₂ selectivity at 293 K. The high ultra-micropore density significantly boosted CO₂ uptake and maintained stable CO₂ uptake over five adsorption cycles. Overall, this work devoted efforts to sustainable environment, biowaste management, and possible practical applicability of designed adsorbent for CO<sub>2</sub> storage.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"92 ","pages":"Article 103033"},"PeriodicalIF":7.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.jcou.2025.103027
Fuzhen Chen , Lijuan Yang , Qinghe Hu , Lei Wang , Yufei Bai , Jianwei Gu
Current research on CO2 storage in aquifers typically focuses on high porosity and permeability formations to maximize storage capacity, often overlooking crucial factors such as long-term stability and safety. To address this gap, this study explores the potential for CO2 storage in low porosity and permeability aquifers, utilizing core samples from Ordos storage pilot site. The corresponding T2 spectra exhibit characteristic of high-left and low-right peaks, which separately influence storage capacity and flow behavior. Critical porosity and permeability thresholds were identified, distinguishing the contributions of different pores to storage efficiency. Lower temperature, higher pressure, and supercritical state extend the effective gas displacement duration, enhancing contribution of small pores to CO2 storage. CO2-water redistribution within varying pore sizes leads to the synchronous behavior between injection pressure and water saturation, helping to alleviate CO2 injection challenges. As permeability decreases and displacement cycle increases, relative permeability curves display rightward and leftward shifts, respectively. While these shifts reduce movable pore space and CO2 storage capacity, they concurrently increase residual gas and connate water saturations, thus enhancing CO2 storage stability through residual gas trapping and solubility trapping mechanisms. Nanopore CO2 adsorption further strengthens this storage stability. Low permeability aquifers, characterized by tighter grain packing, stronger cementation, and smaller pores, provide superior resistance to geochemical dissolution and mechanical damage. Consequently, these aquifers provide unique advantages in structural stability and long-term sequestration safety compared to higher permeability counterparts. Furthermore, the greater abundance of low permeability aquifers may compensate for their disadvantage of low storage efficiency.
{"title":"Experimental study of CO2 flow behavior and storage potential within low porosity and permeability aquifer","authors":"Fuzhen Chen , Lijuan Yang , Qinghe Hu , Lei Wang , Yufei Bai , Jianwei Gu","doi":"10.1016/j.jcou.2025.103027","DOIUrl":"10.1016/j.jcou.2025.103027","url":null,"abstract":"<div><div>Current research on CO<sub>2</sub> storage in aquifers typically focuses on high porosity and permeability formations to maximize storage capacity, often overlooking crucial factors such as long-term stability and safety. To address this gap, this study explores the potential for CO<sub>2</sub> storage in low porosity and permeability aquifers, utilizing core samples from Ordos storage pilot site. The corresponding T<sub>2</sub> spectra exhibit characteristic of high-left and low-right peaks, which separately influence storage capacity and flow behavior. Critical porosity and permeability thresholds were identified, distinguishing the contributions of different pores to storage efficiency. Lower temperature, higher pressure, and supercritical state extend the effective gas displacement duration, enhancing contribution of small pores to CO<sub>2</sub> storage. CO<sub>2</sub>-water redistribution within varying pore sizes leads to the synchronous behavior between injection pressure and water saturation, helping to alleviate CO<sub>2</sub> injection challenges. As permeability decreases and displacement cycle increases, relative permeability curves display rightward and leftward shifts, respectively. While these shifts reduce movable pore space and CO<sub>2</sub> storage capacity, they concurrently increase residual gas and connate water saturations, thus enhancing CO<sub>2</sub> storage stability through residual gas trapping and solubility trapping mechanisms. Nanopore CO<sub>2</sub> adsorption further strengthens this storage stability. Low permeability aquifers, characterized by tighter grain packing, stronger cementation, and smaller pores, provide superior resistance to geochemical dissolution and mechanical damage. Consequently, these aquifers provide unique advantages in structural stability and long-term sequestration safety compared to higher permeability counterparts. Furthermore, the greater abundance of low permeability aquifers may compensate for their disadvantage of low storage efficiency.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"92 ","pages":"Article 103027"},"PeriodicalIF":7.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.jcou.2025.103024
Elbaraa Elghazy , Matt M.J Davies , Nicholas T.H Farr , Cornelia Rodenburg , Jon R. Willmott , Jagroop Pandhal
Climate change due to the greenhouse effect poses arguably the greatest challenge to humanity. Addressing the sources of CO2 and reducing current atmospheric levels is the paramount task for scientists and engineers. Carbon capture with storage or utilization technologies are key to achieving this goal. Biological carbon fixation is an effective method of converting pollutant CO2 into usable biochemicals for industrial applications. Inspired by recent evidence that 95 % of CO2 from aerosol emissions from an Australian forest fire was captured by algae in the Southern Ocean, as well as the ability of algae to be transported within aerosols, we propose a novel technique for CO2 sequestration based on creating aerosols containing metabolically active cyanobacteria. Using aerosols as a microenvironment for Synechocystis cells enables a significant increase in gas-liquid-interfacial-surface-area while reducing the volume of water required. We utilize electron microscopy and hyperspectral microscopy to assess the effects of aerosolization and high CO2 concentrations on microbial cell viability. Additionally, we implemented highspeed imaging and oil immersion microscopy to determine the effectiveness of the aerosolization technique for forming aerosols and optimizing process parameters. We show that 1 % CO2 (v/v) is ideal for CO2 capture, where cell stress was minimized. Using cell densities of 1.2 × 108 cell/mL was the most efficient in terms of the number of cells aerosolized when compared to the input cell density. We report a 6-fold increase in carbon fixation rates (gCO2 g−1 biomass hr−1) over alternative popular cultivation techniques such as bubble columns.
{"title":"Capturing microalgae within aerosols provides carbon capture bio-functionality","authors":"Elbaraa Elghazy , Matt M.J Davies , Nicholas T.H Farr , Cornelia Rodenburg , Jon R. Willmott , Jagroop Pandhal","doi":"10.1016/j.jcou.2025.103024","DOIUrl":"10.1016/j.jcou.2025.103024","url":null,"abstract":"<div><div>Climate change due to the greenhouse effect poses arguably the greatest challenge to humanity. Addressing the sources of CO<sub>2</sub> and reducing current atmospheric levels is the paramount task for scientists and engineers. Carbon capture with storage or utilization technologies are key to achieving this goal. Biological carbon fixation is an effective method of converting pollutant CO<sub>2</sub> into usable biochemicals for industrial applications. Inspired by recent evidence that 95 % of CO<sub>2</sub> from aerosol emissions from an Australian forest fire was captured by algae in the Southern Ocean, as well as the ability of algae to be transported within aerosols, we propose a novel technique for CO<sub>2</sub> sequestration based on creating aerosols containing metabolically active cyanobacteria. Using aerosols as a microenvironment for <em>Synechocystis</em> cells enables a significant increase in gas-liquid-interfacial-surface-area while reducing the volume of water required. We utilize electron microscopy and hyperspectral microscopy to assess the effects of aerosolization and high CO<sub>2</sub> concentrations on microbial cell viability. Additionally, we implemented highspeed imaging and oil immersion microscopy to determine the effectiveness of the aerosolization technique for forming aerosols and optimizing process parameters. We show that 1 % CO<sub>2</sub> (v/v) is ideal for CO<sub>2</sub> capture, where cell stress was minimized. Using cell densities of 1.2 × 10<sup>8</sup> cell/mL was the most efficient in terms of the number of cells aerosolized when compared to the input cell density. We report a 6-fold increase in carbon fixation rates (gCO<sub>2</sub> g<sup>−1</sup> biomass hr<sup>−1</sup>) over alternative popular cultivation techniques such as bubble columns.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"92 ","pages":"Article 103024"},"PeriodicalIF":7.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.jcou.2025.103031
Jiamin Wang , BiChen Tian , Rui Li , Jianming Li
Greenhouses play a crucial role in agricultural production, especially in high-latitude regions requiring supplemental heating during winter. This study explores the potential of a Shed-type Greenhouse Composting Device (SGCD) to recover heat and CO2 from composting agricultural waste (AW) for use in solar greenhouses. A Life Cycle Assessment (LCA) was conducted to evaluate the environmental impacts of the SGCD system, covering its construction, operation, and recycling units. The results show that heat and CO2 recovery significantly reduce reliance on coal heating and CO2 cylinders, with heat recovery contributing 30.94 % and CO2 recovery 17.40 % to impact reduction. Key environmental hotspots include the impacts of construction materials, water, electricity, and diesel use. Sensitivity analysis revealed that the system is most sensitive to freshwater ecotoxicity, toxicity equivalent, and marine ecotoxicity. The impact of AW processing is minimal, contributing only 1.09 % of the total impact. Economically, the SGCD system increases tomato yield by 15.06 %, generating an additional $225.35 in annual revenue, with a payback period of two years and profitability from the third year. Overall, the SGCD system offers both environmental and economic benefits, promoting energy-efficient, low-carbon agricultural practices in high-latitude greenhouses.
{"title":"Life cycle assessment of heat, CO2 from composting for greenhouse applications","authors":"Jiamin Wang , BiChen Tian , Rui Li , Jianming Li","doi":"10.1016/j.jcou.2025.103031","DOIUrl":"10.1016/j.jcou.2025.103031","url":null,"abstract":"<div><div>Greenhouses play a crucial role in agricultural production, especially in high-latitude regions requiring supplemental heating during winter. This study explores the potential of a Shed-type Greenhouse Composting Device (SGCD) to recover heat and CO<sub>2</sub> from composting agricultural waste (AW) for use in solar greenhouses. A Life Cycle Assessment (LCA) was conducted to evaluate the environmental impacts of the SGCD system, covering its construction, operation, and recycling units. The results show that heat and CO<sub>2</sub> recovery significantly reduce reliance on coal heating and CO<sub>2</sub> cylinders, with heat recovery contributing 30.94 % and CO<sub>2</sub> recovery 17.40 % to impact reduction. Key environmental hotspots include the impacts of construction materials, water, electricity, and diesel use. Sensitivity analysis revealed that the system is most sensitive to freshwater ecotoxicity, toxicity equivalent, and marine ecotoxicity. The impact of AW processing is minimal, contributing only 1.09 % of the total impact. Economically, the SGCD system increases tomato yield by 15.06 %, generating an additional $225.35 in annual revenue, with a payback period of two years and profitability from the third year. Overall, the SGCD system offers both environmental and economic benefits, promoting energy-efficient, low-carbon agricultural practices in high-latitude greenhouses.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"92 ","pages":"Article 103031"},"PeriodicalIF":7.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.jcou.2024.103013
Jhuma Sadhukhan , Oliver J. Fisher , Benjamin Cummings , Jin Xuan
This novel study presents an effective comprehensive life cycle assessment (LCA) of a novel sustainable carbon dioxide capture and utilization (CCU) system to co-produce alcohol ethoxylate (AE7), a valuable surfactant (a high-value chemical component of liquid detergents), and low-medium distillate range liquid fuel. Conventionally, AE7 is produced by reacting fatty alcohols with ethylene oxide from mostly fossil and marginally bio-based resources. This research develops novel AE7 production using carbon sources from flue gas of paper and steel industries, addressing a critical gap in the literature. The core process is Fischer-Tropsch (FT) synthesis using syngas formed by the reverse-water-gas-shift reaction, where recycled CO2 reacts with H2. FT produces C11-C13 alkanes and a light-to-medium fuel co-product. The alkanes are converted into C12-C14 fatty alcohols through dehydrogenation, hydroformylation, and hydrogenation. Fatty alcohols react with ethylene oxide to form AE7. The yields (w/w) of AE7 and the fuel co-products are 3.7 % and 3.4 % for paper industry flue gas, and 8.0 % and 9.5 % for steel industry flue gas, respectively. Renewable (wind) electricity meets the hydrogen demand and electricity needs for the reactions, a total of 13.4 and 33.3 kWh/kg flue gas, respectively. The life cycle impact assessment includes global warming potential (GWP) and other impacts using ReCiPe, Impact+ , and Product Environmental Footprint methods. Baseline scenarios show GWP ranging from 2.2 to 3.6 kg CO2e/kg surfactant for conventional cradle-to-gate AE production systems. The new systems have GWP ranging 0.4–1.3 kg CO2e/kg flue gas (cradle-to-gate) using mass allocation. Meanwhile, the paper industry’s flue gas system has biogenic CO2, while the steel industry’s CO2 is fossil-based. Considering the GWP reductions due to biogenic CO2 contents, their overall GWP is 2.56 kg CO2e and 10.33 kg CO2e per kg of product (AE7 +fuel) (cradle-to-grave) using economic allocation. Thus, biogenic CCU is critical for the sustainable co-production of high-value surfactants and fuel.
{"title":"Novel comprehensive life cycle assessment (LCA) of sustainable flue gas carbon capture and utilization (CCU) for surfactant and fuel via Fischer-Tropsch synthesis","authors":"Jhuma Sadhukhan , Oliver J. Fisher , Benjamin Cummings , Jin Xuan","doi":"10.1016/j.jcou.2024.103013","DOIUrl":"10.1016/j.jcou.2024.103013","url":null,"abstract":"<div><div>This novel study presents an effective comprehensive life cycle assessment (LCA) of a novel sustainable carbon dioxide capture and utilization (CCU) system to co-produce alcohol ethoxylate (AE7), a valuable surfactant (a high-value chemical component of liquid detergents), and low-medium distillate range liquid fuel. Conventionally, AE7 is produced by reacting fatty alcohols with ethylene oxide from mostly fossil and marginally bio-based resources. This research develops novel AE7 production using carbon sources from flue gas of paper and steel industries, addressing a critical gap in the literature. The core process is Fischer-Tropsch (FT) synthesis using syngas formed by the reverse-water-gas-shift reaction, where recycled CO<sub>2</sub> reacts with H<sub>2</sub>. FT produces C11-C13 alkanes and a light-to-medium fuel co-product. The alkanes are converted into C12-C14 fatty alcohols through dehydrogenation, hydroformylation, and hydrogenation. Fatty alcohols react with ethylene oxide to form AE7. The yields (w/w) of AE7 and the fuel co-products are 3.7 % and 3.4 % for paper industry flue gas, and 8.0 % and 9.5 % for steel industry flue gas, respectively. Renewable (wind) electricity meets the hydrogen demand and electricity needs for the reactions, a total of 13.4 and 33.3 kWh/kg flue gas, respectively. The life cycle impact assessment includes global warming potential (GWP) and other impacts using ReCiPe, Impact+ , and Product Environmental Footprint methods. Baseline scenarios show GWP ranging from 2.2 to 3.6 kg CO<sub>2</sub>e/kg surfactant for conventional cradle-to-gate AE production systems. The new systems have GWP ranging 0.4–1.3 kg CO<sub>2</sub>e/kg flue gas (cradle-to-gate) using mass allocation. Meanwhile, the paper industry’s flue gas system has biogenic CO<sub>2</sub>, while the steel industry’s CO<sub>2</sub> is fossil-based. Considering the GWP reductions due to biogenic CO<sub>2</sub> contents, their overall GWP is 2.56 kg CO<sub>2</sub>e and 10.33 kg CO<sub>2</sub>e per kg of product (AE7 +fuel) (cradle-to-grave) using economic allocation. Thus, biogenic CCU is critical for the sustainable co-production of high-value surfactants and fuel.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"92 ","pages":"Article 103013"},"PeriodicalIF":7.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.jcou.2025.103019
Gian Müller , Felix Kullmann , Jochen Linssen , Detlef Stolten
In this review, the techno-economic data for various emerging Power-to-X (PtX) technologies is summarized and discussed, with recommendations for appropriate values presented. These recommendations can serve as a reference in, e.g., energy system modeling, in which such data is desperately needed in order to define these novel processes and assess their impact on the energy system of the future. To this end, over 300 publications concerning PtX processes for gases (methane and syngas), fuels (methanol and synfuels) and chemicals (ethylene and formic acid) were evaluated in a structured literature search with respect to their financial key performance indicators (KPIs) such as capital expenditures (CAPEX) and operational expenditures (OPEX); process-specific KPIs such as efficiency, lifetime, and operating conditions; and their technology readiness levels (TRLs). The review finds that for all of the investigated technologies, significant cost reductions can be anticipated until 2050 due to scaling and learning effects. The magnitude of the cost reduction differs with each technology and is often connected to its degree of technological maturity. The prevalent technological immaturity of most processes also means that they are not yet cost-competitive with conventional fossil production technologies. Furthermore, data availability varies strongly between the assessed technologies and can influence the quality of the projections.
{"title":"The costs of future energy technologies: A comprehensive review of power-to-X processes","authors":"Gian Müller , Felix Kullmann , Jochen Linssen , Detlef Stolten","doi":"10.1016/j.jcou.2025.103019","DOIUrl":"10.1016/j.jcou.2025.103019","url":null,"abstract":"<div><div>In this review, the techno-economic data for various emerging Power-to-X (PtX) technologies is summarized and discussed, with recommendations for appropriate values presented. These recommendations can serve as a reference in, e.g., energy system modeling, in which such data is desperately needed in order to define these novel processes and assess their impact on the energy system of the future. To this end, over 300 publications concerning PtX processes for gases (methane and syngas), fuels (methanol and synfuels) and chemicals (ethylene and formic acid) were evaluated in a structured literature search with respect to their financial key performance indicators (KPIs) such as capital expenditures (CAPEX) and operational expenditures (OPEX); process-specific KPIs such as efficiency, lifetime, and operating conditions; and their technology readiness levels (TRLs). The review finds that for all of the investigated technologies, significant cost reductions can be anticipated until 2050 due to scaling and learning effects. The magnitude of the cost reduction differs with each technology and is often connected to its degree of technological maturity. The prevalent technological immaturity of most processes also means that they are not yet cost-competitive with conventional fossil production technologies. Furthermore, data availability varies strongly between the assessed technologies and can influence the quality of the projections.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"92 ","pages":"Article 103019"},"PeriodicalIF":7.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.jcou.2025.103022
Kairi Yamamoto, Ikuo Ushiki
Ibuprofen and ketoprofen were impregnated onto SBA-15 type mesoporous silica using the supercritical fluid deposition (SCFD) method with supercritical carbon dioxide (CO2) as the solvent at temperatures ranging from 313 K to 343 K and a pressure of 15 MPa. The prepared samples were evaluated using electron microscopy, nitrogen adsorption measurements, infrared spectroscopy, and thermogravimetric analysis. The impregnation of the drugs into the mesoporous silica pores was confirmed by nitrogen adsorption experiments. The amount of drug impregnation was found to depend on both the drug species and the type of mesoporous silica. It was suggested that the solubility in supercritical CO2 played a dominant role for the drug species. There was virtually no effect of temperature on the amount of drug impregnation, which may be attributed to the interplay between the solubility of supercritical CO2 and the adsorption equilibrium of the drug on mesoporous silica under supercritical CO2 conditions.
{"title":"Impregnation of non-steroidal anti-inflammatory drugs (ibuprofen and ketoprofen) onto mesoporous silica SBA-15 using supercritical CO2","authors":"Kairi Yamamoto, Ikuo Ushiki","doi":"10.1016/j.jcou.2025.103022","DOIUrl":"10.1016/j.jcou.2025.103022","url":null,"abstract":"<div><div>Ibuprofen and ketoprofen were impregnated onto SBA-15 type mesoporous silica using the supercritical fluid deposition (SCFD) method with supercritical carbon dioxide (CO<sub>2</sub>) as the solvent at temperatures ranging from 313 K to 343 K and a pressure of 15 MPa. The prepared samples were evaluated using electron microscopy, nitrogen adsorption measurements, infrared spectroscopy, and thermogravimetric analysis. The impregnation of the drugs into the mesoporous silica pores was confirmed by nitrogen adsorption experiments. The amount of drug impregnation was found to depend on both the drug species and the type of mesoporous silica. It was suggested that the solubility in supercritical CO<sub>2</sub> played a dominant role for the drug species. There was virtually no effect of temperature on the amount of drug impregnation, which may be attributed to the interplay between the solubility of supercritical CO<sub>2</sub> and the adsorption equilibrium of the drug on mesoporous silica under supercritical CO<sub>2</sub> conditions.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"92 ","pages":"Article 103022"},"PeriodicalIF":7.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.jcou.2025.103021
Farag M.A. Altalbawy , Nadhir N.A. Jafar , Dharmesh Sur , Anupam Yadav , Subbulakshmi Ganesan , Aman Shankhyan , M. Ravi Kumar , Girish Chandra Sharma , Iskandar Shernazarov , Sarah Qutayba Badraldin , Uday Abdul-Reda Hussein , Khursheed Muzammil , Hossein Mahabadi Asl
The current study aims at modeling the solubility of anti-cancer agents in supercritical carbon dioxide (SC-CO2). An extensive databank, including 893 measured samples for 33 anti-cancer agents were collected from the literature, covering extensive ranges of operating conditions. Eight density-based empirical models were firstly employed to correlate the collected data. After adjusting their constant coefficients, four of them provided satisfactory estimations, with total average absolute relative errors (AAREs) below 10 %. A novel six-parameter empirical correlation was also proposed, with input factors optimized based on the Pearson coefficient analysis. This correlation produced satisfactory results for the analyzed drugs, achieving a total AARE of 7.71 %. Afterward, a generalized and unified model was built using the intelligent method of gaussian process regression (GPR). For the testing data, this model showed excellent results with AARE and R2 values of 2.90 % and 99.87 %, respectively. Furthermore, its estimations for all anti-cancer agents outperformed the empirical correlations significantly. Both empirical and intelligent models accurately described the physical behavior of anti-cancer agents’ solubility in SC-CO2 under various conditions. Subsequently, the most effective factors on the performances of the models were recognized through a sensitivity analysis.
{"title":"Universal data-driven models to estimate the solubility of anti-cancer drugs in supercritical carbon dioxide: Correlation development and machine learning modeling","authors":"Farag M.A. Altalbawy , Nadhir N.A. Jafar , Dharmesh Sur , Anupam Yadav , Subbulakshmi Ganesan , Aman Shankhyan , M. Ravi Kumar , Girish Chandra Sharma , Iskandar Shernazarov , Sarah Qutayba Badraldin , Uday Abdul-Reda Hussein , Khursheed Muzammil , Hossein Mahabadi Asl","doi":"10.1016/j.jcou.2025.103021","DOIUrl":"10.1016/j.jcou.2025.103021","url":null,"abstract":"<div><div>The current study aims at modeling the solubility of anti-cancer agents in supercritical carbon dioxide (SC-CO<sub>2</sub>). An extensive databank, including 893 measured samples for 33 anti-cancer agents were collected from the literature, covering extensive ranges of operating conditions. Eight density-based empirical models were firstly employed to correlate the collected data. After adjusting their constant coefficients, four of them provided satisfactory estimations, with total average absolute relative errors (AAREs) below 10 %. A novel six-parameter empirical correlation was also proposed, with input factors optimized based on the Pearson coefficient analysis. This correlation produced satisfactory results for the analyzed drugs, achieving a total AARE of 7.71 %. Afterward, a generalized and unified model was built using the intelligent method of gaussian process regression (GPR). For the testing data, this model showed excellent results with AARE and R<sup>2</sup> values of 2.90 % and 99.87 %, respectively. Furthermore, its estimations for all anti-cancer agents outperformed the empirical correlations significantly. Both empirical and intelligent models accurately described the physical behavior of anti-cancer agents’ solubility in SC-CO<sub>2</sub> under various conditions. Subsequently, the most effective factors on the performances of the models were recognized through a sensitivity analysis.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"92 ","pages":"Article 103021"},"PeriodicalIF":7.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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