Pub Date : 2025-02-01DOI: 10.1016/j.jcou.2025.103020
Karine Arrhenius , Sandra Hultmark , Iris de Krom , Luuk Meijer , Emma Henderson , Janneke van Wijk
The capture, use and storage of biogenic CO2 from the biogas sector contributes to environmental benefits by reducing the overall greenhouse gas emissions. In several plants, CO2 separated in the biogas upgrading process is captured and processed. Depending on the composition, some level of purification is needed before the biogenic CO2 can be used, for example, in the food industry. In this article, we first present novel or adapted analytical methods which are both cost-effective and reliable to assess the purity of CO2 streams. These methods concern not only species that are currently regulated in different standards but also allows for an extensive overview of the overall gas composition. The methods are then applied to samples of CO2 stream collected from different biogas plants located in Sweden. Results from this campaign are presented together with some conclusions regarding the need to further purify the stream so the CO2 even fulfill the most stringent requirements such as those set by the food industry. The need for purification concerns only a few species: water, methane, oxygen, nitrogen (for all samples), and hydrogen sulfide (in two cases). VOCs found specifically when the plants digest food wastes may also require a purification step, however, only some of these compounds are currently regulated.
{"title":"Quality of biogenic carbon dioxide stream from biogas plants including analytical method development","authors":"Karine Arrhenius , Sandra Hultmark , Iris de Krom , Luuk Meijer , Emma Henderson , Janneke van Wijk","doi":"10.1016/j.jcou.2025.103020","DOIUrl":"10.1016/j.jcou.2025.103020","url":null,"abstract":"<div><div>The capture, use and storage of biogenic CO<sub>2</sub> from the biogas sector contributes to environmental benefits by reducing the overall greenhouse gas emissions. In several plants, CO<sub>2</sub> separated in the biogas upgrading process is captured and processed. Depending on the composition, some level of purification is needed before the biogenic CO<sub>2</sub> can be used, for example, in the food industry. In this article, we first present novel or adapted analytical methods which are both cost-effective and reliable to assess the purity of CO<sub>2</sub> streams. These methods concern not only species that are currently regulated in different standards but also allows for an extensive overview of the overall gas composition. The methods are then applied to samples of CO<sub>2</sub> stream collected from different biogas plants located in Sweden. Results from this campaign are presented together with some conclusions regarding the need to further purify the stream so the CO<sub>2</sub> even fulfill the most stringent requirements such as those set by the food industry. The need for purification concerns only a few species: water, methane, oxygen, nitrogen (for all samples), and hydrogen sulfide (in two cases). VOCs found specifically when the plants digest food wastes may also require a purification step, however, only some of these compounds are currently regulated.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"92 ","pages":"Article 103020"},"PeriodicalIF":7.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182715","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.2025.103026
Wenye Zha , Ying Chen , Hu Wang , Weifeng Chen , Yi-Zhu Lei , Ya-Li Wan , Shenglai Zhong
Ionic polymers functionalized with hydrogen bond donors (HBDs) exhibit immense potential in the green chemical fixation of carbon dioxide (CO2); however, achieving high catalytic activity remains a significant challenge. In this study, we synthesized oxalamide-based ionic polymers and their composites with carbon nanotubes using a straightforward ball-milling method. The incorporation of oxalamide notably enhanced the catalytic activity of the ionic polymers by activating the C-O bond of the epoxide via HBD interaction. Furthermore, compositing with carbon nanotubes enhanced the catalytic performance of the composite materials via improving the accessibility of active sites. As a result, the optimized composite catalyst, P(PyOA-BBr3)@CNT-3, demonstrated exceptional catalytic efficiency in the cycloaddition reaction between CO2 and epichlorohydrin, achieving an outstanding initial turnover frequency (TOF) of 1360 h−1 and a 68 % yield of epichlorohydrin carbonate at 140 °C. This makes our solid organocatalyst one of the most efficient metal-free solid catalytic systems reported to date. Moreover, P(PyOA-BBr3)@CNT-3 exhibited good substrate compatibility and could be easily recycled and used for at least six cycles. This study not only introduces an efficient HBD for designing bifunctional catalysts, but also presents a feasible and environmentally friendly approach for constructing highly active ionic polymer-based composite catalysts for CO2 fixation.
{"title":"Oxalamide-derived ionic polymer/carbon nanotube composites: Highly active heterogeneous catalyst for promoting cycloaddition of carbon dioxide to epoxides","authors":"Wenye Zha , Ying Chen , Hu Wang , Weifeng Chen , Yi-Zhu Lei , Ya-Li Wan , Shenglai Zhong","doi":"10.1016/j.jcou.2025.103026","DOIUrl":"10.1016/j.jcou.2025.103026","url":null,"abstract":"<div><div>Ionic polymers functionalized with hydrogen bond donors (HBDs) exhibit immense potential in the green chemical fixation of carbon dioxide (CO<sub>2</sub>); however, achieving high catalytic activity remains a significant challenge. In this study, we synthesized oxalamide-based ionic polymers and their composites with carbon nanotubes using a straightforward ball-milling method. The incorporation of oxalamide notably enhanced the catalytic activity of the ionic polymers by activating the C-O bond of the epoxide via HBD interaction. Furthermore, compositing with carbon nanotubes enhanced the catalytic performance of the composite materials via improving the accessibility of active sites. As a result, the optimized composite catalyst, P(PyOA-BBr<sub>3</sub>)@CNT-3, demonstrated exceptional catalytic efficiency in the cycloaddition reaction between CO<sub>2</sub> and epichlorohydrin, achieving an outstanding initial turnover frequency (TOF) of 1360 h<sup>−1</sup> and a 68 % yield of epichlorohydrin carbonate at 140 °C. This makes our solid organocatalyst one of the most efficient metal-free solid catalytic systems reported to date. Moreover, P(PyOA-BBr<sub>3</sub>)@CNT-3 exhibited good substrate compatibility and could be easily recycled and used for at least six cycles. This study not only introduces an efficient HBD for designing bifunctional catalysts, but also presents a feasible and environmentally friendly approach for constructing highly active ionic polymer-based composite catalysts for CO<sub>2</sub> fixation.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"92 ","pages":"Article 103026"},"PeriodicalIF":7.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182655","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.2025.103017
Omer Salim, Keerti Vardhan Sharma, Mohammad Piri
This study investigates the adsorption behavior of supercritical carbon dioxide (scCO2) in nanoporous materials, with a particular focus on the effects of temperature and pore size. Using a novel gravimetric method, we examined three samples of mesoporous silica MCM-41 with varying pore diameters of 60, 80, and 100 Å. The pore size distributions for these samples were confirmed by nitrogen sorption analysis, revealing significant uniformity. The adsorption and desorption isotherms of scCO2 were measured experimentally across a temperature range of 304.15–373.15 K (Kelvin). The results showed that the adsorption capacity was increased at lower temperatures, underscoring the inverse relationship between scCO2 density and temperature. A comparison between mesoporous materials and bulk spaces highlighted the superior CO2 storage capacity of the former, owing to their larger surface area and pore volume. Furthermore, the thermodynamic behavior of scCO2 inferred from the adsorption isotherms demonstrated the formation of a denser phase similar to the liquid at conditions above critical temperature and well above critical pressure. The findings from this study significantly improve the current understanding of the phase behavior of scCO2 in confined spaces and offer valuable insights for CO2 storage.
{"title":"Storage of supercritical carbon dioxide in nanoporous media","authors":"Omer Salim, Keerti Vardhan Sharma, Mohammad Piri","doi":"10.1016/j.jcou.2025.103017","DOIUrl":"10.1016/j.jcou.2025.103017","url":null,"abstract":"<div><div>This study investigates the adsorption behavior of supercritical carbon dioxide (scCO<sub>2</sub>) in nanoporous materials, with a particular focus on the effects of temperature and pore size. Using a novel gravimetric method, we examined three samples of mesoporous silica MCM-41 with varying pore diameters of 60, 80, and 100 Å. The pore size distributions for these samples were confirmed by nitrogen sorption analysis, revealing significant uniformity. The adsorption and desorption isotherms of scCO<sub>2</sub> were measured experimentally across a temperature range of 304.15–373.15 K (Kelvin). The results showed that the adsorption capacity was increased at lower temperatures, underscoring the inverse relationship between scCO<sub>2</sub> density and temperature. A comparison between mesoporous materials and bulk spaces highlighted the superior CO<sub>2</sub> storage capacity of the former, owing to their larger surface area and pore volume. Furthermore, the thermodynamic behavior of scCO<sub>2</sub> inferred from the adsorption isotherms demonstrated the formation of a denser phase similar to the liquid at conditions above critical temperature and well above critical pressure. The findings from this study significantly improve the current understanding of the phase behavior of scCO<sub>2</sub> in confined spaces and offer valuable insights for CO<sub>2</sub> storage.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"92 ","pages":"Article 103017"},"PeriodicalIF":7.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182718","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.2025.103030
Guangyu Sun , Fujun Sheng , Qingyi Li , Chuanxian Li , Fei Yang , Bo Yao , Yansong Zhao
With the technology of enhanced oil recovery by supercritical CO2 flooding (scCO2-EOR) popularized and applied, the water-in-oil (W/O) emulsion can be easily formed in the surface gathering pipeline when the produced crude oil and water flows through the pump and throttle valve. The formation of emulsion increases the resistance and cost of pipeline transportation tremendously. Considering the detrimental effect of emulsion formation, we focus on the effect of CO2 treatment on rheological properties and stability of emulsion within the pipeline. It is hoped to provide some guidance for the increase in the efficiency of pipeline transportation and emulsion treatment. In this work, a device was developed to simulate the scCO2 treatment conditions in the reservoir. The variations in gelation process, pour point, yield stress, viscosity-temperature property and coalescence stability of emulsion were studied experimentally under treatment conditions (without any treatment, treated by 80 ℃, 5 MPa, treated by 80 ℃, 15 MPa, treated by 80 ℃, 25 MPa). The effect of scCO2 treatment on gelation property of emulsion was reported for the first time. The results show that the storage modulus and gelation temperature are increased obviously after the scCO2 treatment, which is owing to the influence of scCO2 treatment on wax crystals morphology and gelation structure of system. As for the pour point, yield stress, and viscosity/apparent viscosity, they are all enlarged greatly after scCO2 treatment, due to the scCO2 extraction effect. Finally, the sizes of emulsion droplets gradually decrease with the treatment pressure, leading to the improvement of emulsion stability.
{"title":"Rheological properties and coalescence stability of degassed crude oil emulsion: Influence of supercritical CO2 treatment","authors":"Guangyu Sun , Fujun Sheng , Qingyi Li , Chuanxian Li , Fei Yang , Bo Yao , Yansong Zhao","doi":"10.1016/j.jcou.2025.103030","DOIUrl":"10.1016/j.jcou.2025.103030","url":null,"abstract":"<div><div>With the technology of enhanced oil recovery by supercritical CO<sub>2</sub> flooding (scCO<sub>2</sub>-EOR) popularized and applied, the water-in-oil (W/O) emulsion can be easily formed in the surface gathering pipeline when the produced crude oil and water flows through the pump and throttle valve. The formation of emulsion increases the resistance and cost of pipeline transportation tremendously. Considering the detrimental effect of emulsion formation, we focus on the effect of CO<sub>2</sub> treatment on rheological properties and stability of emulsion within the pipeline. It is hoped to provide some guidance for the increase in the efficiency of pipeline transportation and emulsion treatment. In this work, a device was developed to simulate the scCO<sub>2</sub> treatment conditions in the reservoir. The variations in gelation process, pour point, yield stress, viscosity-temperature property and coalescence stability of emulsion were studied experimentally under treatment conditions (without any treatment, treated by 80 ℃, 5 MPa, treated by 80 ℃, 15 MPa, treated by 80 ℃, 25 MPa). The effect of scCO<sub>2</sub> treatment on gelation property of emulsion was reported for the first time. The results show that the storage modulus and gelation temperature are increased obviously after the scCO<sub>2</sub> treatment, which is owing to the influence of scCO<sub>2</sub> treatment on wax crystals morphology and gelation structure of system. As for the pour point, yield stress, and viscosity/apparent viscosity, they are all enlarged greatly after scCO<sub>2</sub> treatment, due to the scCO<sub>2</sub> extraction effect. Finally, the sizes of emulsion droplets gradually decrease with the treatment pressure, leading to the improvement of emulsion stability.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"92 ","pages":"Article 103030"},"PeriodicalIF":7.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182610","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.2025.103032
María Escamilla, Alfonso Caballero, Gerardo Colón
Co-Cu/SBA-15 systems have been studied for the reverse water gas shift (rWGS) reaction within mild temperature range of 250–650 ºC. CuOx and CoOx species at different weight ratios were deposited from wet impregnation method over SBA-15 support. We have stated that pre-reduction treatment before reaction leads to the complete Co and Cu reduction for Co-Cu/SBA systems. A low copper content on Co/SBA system leads to similar CO2 conversion than monometallic Co-catalyst. However, competitive Sabatier side reaction appears almost suppressed. So, upon Cu incorporation a significant improvement on CO yield has been attained with respect to Co/SBA catalyst. Thus, a good compromise is attained at 450 ºC using Co5Cu5/SBA catalyst for which a stable CO2 conversion of 22 % and 97 % CO selectivity has been obtained under lowest H2:CO2 ratio.
{"title":"Improved CO selectivity during CO2 hydrogenation by bimetallic copper-cobalt supported SBA-15","authors":"María Escamilla, Alfonso Caballero, Gerardo Colón","doi":"10.1016/j.jcou.2025.103032","DOIUrl":"10.1016/j.jcou.2025.103032","url":null,"abstract":"<div><div>Co-Cu/SBA-15 systems have been studied for the reverse water gas shift (rWGS) reaction within mild temperature range of 250–650 ºC. CuOx and CoOx species at different weight ratios were deposited from wet impregnation method over SBA-15 support. We have stated that pre-reduction treatment before reaction leads to the complete Co and Cu reduction for Co-Cu/SBA systems. A low copper content on Co/SBA system leads to similar CO<sub>2</sub> conversion than monometallic Co-catalyst. However, competitive Sabatier side reaction appears almost suppressed. So, upon Cu incorporation a significant improvement on CO yield has been attained with respect to Co/SBA catalyst. Thus, a good compromise is attained at 450 ºC using Co5Cu5/SBA catalyst for which a stable CO<sub>2</sub> conversion of 22 % and 97 % CO selectivity has been obtained under lowest H<sub>2</sub>:CO<sub>2</sub> ratio.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"92 ","pages":"Article 103032"},"PeriodicalIF":7.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181267","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.2025.103029
Helga K. Ruiz , José M. Gómez-Salazar , Lourdes Calvo , Albertina Cabañas
The global demand for single-use personal protective equipment (PPE) is rapidly increasing. Most PPE items are composed of plastics, which often end up in landfills or oceans, causing significant environmental harm. Additionally, the disposal of PPE is costly, as it is classified as biological waste. In this study, sanitary PPE components were sterilized using supercritical CO2 at 40°C and 10 MPa, with the addition of small amounts of additives (<0.1 %). Specifically, sterilisation was achieved using as additives mixtures of water, H2O2 and acetic anhydride, or peracetic acid. The materials were characterized before and after treatment using FTIR, DSC, and SEM-EDX to assess whether the sterilization process affected the physical and chemical properties of the PPE components. Results showed that masks, gowns, coveralls, caps, and shoe covers were largely unaffected by the treatment, while nitrile gloves and protective glasses exhibited alterations. No traces of the additives were detected in the treated materials, as they were carried away by the CO2 during depressurization. These findings demonstrate that supercritical CO2 sterilization is a viable method for reusing certain PPE components or recycling them as polymeric raw materials, offering an environmentally friendly alternative to incineration. The significant potential of this technology for hospital applications is evident.
{"title":"Characterisation of plastic-based sanitary personal protective equipment following supercritical CO₂ sterilisation: A reuse strategy","authors":"Helga K. Ruiz , José M. Gómez-Salazar , Lourdes Calvo , Albertina Cabañas","doi":"10.1016/j.jcou.2025.103029","DOIUrl":"10.1016/j.jcou.2025.103029","url":null,"abstract":"<div><div>The global demand for single-use personal protective equipment (PPE) is rapidly increasing. Most PPE items are composed of plastics, which often end up in landfills or oceans, causing significant environmental harm. Additionally, the disposal of PPE is costly, as it is classified as biological waste. In this study, sanitary PPE components were sterilized using supercritical CO<sub>2</sub> at 40°C and 10 MPa, with the addition of small amounts of additives (<0.1 %). Specifically, sterilisation was achieved using as additives mixtures of water, H<sub>2</sub>O<sub>2</sub> and acetic anhydride, or peracetic acid. The materials were characterized before and after treatment using FTIR, DSC, and SEM-EDX to assess whether the sterilization process affected the physical and chemical properties of the PPE components. Results showed that masks, gowns, coveralls, caps, and shoe covers were largely unaffected by the treatment, while nitrile gloves and protective glasses exhibited alterations. No traces of the additives were detected in the treated materials, as they were carried away by the CO<sub>2</sub> during depressurization. These findings demonstrate that supercritical CO<sub>2</sub> sterilization is a viable method for reusing certain PPE components or recycling them as polymeric raw materials, offering an environmentally friendly alternative to incineration. The significant potential of this technology for hospital applications is evident.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"92 ","pages":"Article 103029"},"PeriodicalIF":7.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181641","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.2025.103025
Elena García-Rojas, Jesús Tapiador, Pedro Leo, Carmen Martos, Gisela Orcajo
Eight cost-effective MOF@OMM (Ordered Mesoporous Material) novel hybrid materials composed of SBA-15 and Cu-MOF-74 have been developed for CO₂ capture and conversion. Using a systematic synthesis approach, variables such as impregnation solvent, the copper molar concentration in the impregnation solution, and the MOF crystallization time were varied to find the material with the optimum features for CO2 adsorption and transformation via cycloaddition reaction using epoxides. All synthesized materials were tested in CO2 adsorption at 0 and 45°C to assess their CO2 adsorption capacity at up to 8 bar. Remarkably, CO2 adsorption per mmol of copper is higher for the hybrid Cu-MOF-74@SBA-15 materials than for the sole Cu-MOF-74 and SBA-15, revealing a cooperation effect between both structures. Additionally, as heterogeneous catalysts in CO₂ cycloaddition, the hybrids achieved higher epoxide conversion and turnover numbers than Cu-MOF-74 alone when the same catalyst mass was used. This improved performance comparable to pure MOF with less copper content is attributed to the enhanced dispersion and reduced crystal size of the MOF within the SBA-15 support, increasing accessibility to active sites and resulting in superior catalytic activity and CO₂ adsorption efficiency. This study highlights the potential of these hybrids as cost-effective, sustainable candidates for carbon mitigation solutions.
{"title":"Synergistic performance of novel Cu-MOF-74@SBA-15 material in enhanced CO2 adsorption and transformation","authors":"Elena García-Rojas, Jesús Tapiador, Pedro Leo, Carmen Martos, Gisela Orcajo","doi":"10.1016/j.jcou.2025.103025","DOIUrl":"10.1016/j.jcou.2025.103025","url":null,"abstract":"<div><div>Eight cost-effective MOF@OMM (Ordered Mesoporous Material) novel hybrid materials composed of SBA-15 and Cu-MOF-74 have been developed for CO₂ capture and conversion. Using a systematic synthesis approach, variables such as impregnation solvent, the copper molar concentration in the impregnation solution, and the MOF crystallization time were varied to find the material with the optimum features for CO<sub>2</sub> adsorption and transformation via cycloaddition reaction using epoxides. All synthesized materials were tested in CO<sub>2</sub> adsorption at 0 and 45°C to assess their CO<sub>2</sub> adsorption capacity at up to 8 bar. Remarkably, CO<sub>2</sub> adsorption per mmol of copper is higher for the hybrid Cu-MOF-74@SBA-15 materials than for the sole Cu-MOF-74 and SBA-15, revealing a cooperation effect between both structures. Additionally, as heterogeneous catalysts in CO₂ cycloaddition, the hybrids achieved higher epoxide conversion and turnover numbers than Cu-MOF-74 alone when the same catalyst mass was used. This improved performance comparable to pure MOF with less copper content is attributed to the enhanced dispersion and reduced crystal size of the MOF within the SBA-15 support, increasing accessibility to active sites and resulting in superior catalytic activity and CO₂ adsorption efficiency. This study highlights the potential of these hybrids as cost-effective, sustainable candidates for carbon mitigation solutions.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"92 ","pages":"Article 103025"},"PeriodicalIF":7.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182654","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.2025.103018
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}
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