Pub Date : 2023-06-01DOI: 10.1016/j.crcon.2023.01.001
Wenguang Zhao , Feng Wang , Kangyu Zhao , Xianxiang Liu , Xiaoting Zhu , Le Yan , Yuan Yin , Qiong Xu , Dulin Yin
Biomass-derived 2,5-bis(hydroxymethyl)furan (BHMF) has received great attention and interest due to its broad application prospects in polyesters and medicine. Over the past decades, the catalytic systems including thermocatalytic, biocatalytic, electrocatalytic, and photocatalytic hydrogenation of 5-hydroxymethylfurfural (HMF) into BHMF have been developed to a great extent. To understand the present status and challenges of BHMF production, this review systematically evaluates recent findings and developments of HMF hydrogenation through various reaction systems, with an emphasis on catalyst screening, synthesis processes, and reaction mechanism. Furthermore, a few potential research trends are also proposed, in order to provide innovative ideas for further exploration of BHMF synthesis in a simpler, efficient, and economical way.
{"title":"Recent advances in the catalytic production of bio-based diol 2,5-bis(hydroxymethyl)furan","authors":"Wenguang Zhao , Feng Wang , Kangyu Zhao , Xianxiang Liu , Xiaoting Zhu , Le Yan , Yuan Yin , Qiong Xu , Dulin Yin","doi":"10.1016/j.crcon.2023.01.001","DOIUrl":"10.1016/j.crcon.2023.01.001","url":null,"abstract":"<div><p>Biomass-derived 2,5-bis(hydroxymethyl)furan (BHMF) has received great attention and interest due to its broad application prospects in polyesters and medicine. Over the past decades, the catalytic systems including thermocatalytic, biocatalytic, electrocatalytic, and photocatalytic hydrogenation of 5-hydroxymethylfurfural (HMF) into BHMF have been developed to a great extent. To understand the present status and challenges of BHMF production, this review systematically evaluates recent findings and developments of HMF hydrogenation through various reaction systems, with an emphasis on catalyst screening, synthesis processes, and reaction mechanism. Furthermore, a few potential research trends are also proposed, in order to provide innovative ideas for further exploration of BHMF synthesis in a simpler, efficient, and economical way.</p></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"6 2","pages":"Pages 116-131"},"PeriodicalIF":6.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43715478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rice husk-based activated carbon was prepared with the help of zinc chloride using microwave and electrical dual-mode heating. The pore characteristics and chemical properties of rice husk-based activated carbon (RH-AC) were characterized by BET, XRD, Raman spectra, FTIR and pHIEP (pH of isoelectric point). The specific surface area of RH-AC is 1719.32 m2/g with a total pore volume of 1.05 cm3/g. The performance of RH-AC for removing Cr(VI) from aqueous solution was examined considering the variation of the contact time (0–120 min), pH value (2.0–9.0), adsorbent dose (0.5–3.0 g/L), initial concentration (28–145 mg/L) and solvent temperature (15–45 °C). The ideal pH for Cr(VI) removal is between 2.0 and 3.0 with the equilibrium time of 90 min, achieving the maximum adsorption capacity of 56.82 mg/g with the pH of 3.0. Comparable study on the established kinetic models and isotherms to simulate the removal of Cr(VI) by RH-AC was carried out to sort out the inherent mechanism of the absorption. Reasonable agreements could be obtained by the pseudo-second-order kinetic model and Langmuir, Freundlich and Tempkin isothermal models. Results from Body model simulation suggest that external mass transfer was the essential cause for rate-controlling in the adsorption process of Cr(VI).
{"title":"Removal of Cr(VI) from aqueous solution by Rice-husk-based activated carbon prepared by Dual-mode heating method","authors":"Xinchi Zhang, Shiliang Wu, Yuan Liu, Ziwei Wang, Huiyan Zhang, Rui Xiao","doi":"10.1016/j.crcon.2023.01.003","DOIUrl":"10.1016/j.crcon.2023.01.003","url":null,"abstract":"<div><p>Rice husk-based activated carbon was prepared with the help of zinc chloride using microwave and electrical dual-mode heating. The pore characteristics and chemical properties of rice husk-based activated carbon (RH-AC) were characterized by BET, XRD, Raman spectra, FTIR and pH<sub>IEP</sub> (pH of isoelectric point). The specific surface area of RH-AC is 1719.32 m<sup>2</sup>/g with a total pore volume of 1.05 cm<sup>3</sup>/g. The performance of RH-AC for removing Cr(VI) from aqueous solution was examined considering the variation of the contact time (0–120 min), pH value (2.0–9.0), adsorbent dose (0.5–3.0 g/L), initial concentration (28–145 mg/L) and solvent temperature (15–45 °C). The ideal pH for Cr(VI) removal is between 2.0 and 3.0 with the equilibrium time of 90 min, achieving the maximum adsorption capacity of 56.82 mg/g with the pH of 3.0. Comparable study on the established kinetic models and isotherms to simulate the removal of Cr(VI) by RH-AC was carried out to sort out the inherent mechanism of the absorption. Reasonable agreements could be obtained by the pseudo-second-order kinetic model and Langmuir, Freundlich and Tempkin isothermal models. Results from Body model simulation suggest that external mass transfer was the essential cause for rate-controlling in the adsorption process of Cr(VI).</p></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"6 2","pages":"Pages 76-84"},"PeriodicalIF":6.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43865318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-01DOI: 10.1016/j.crcon.2023.02.003
Xiaowei An , Peifen Wang , Xuli Ma , Xiao Du , Xiaogang Hao , Ziyuan Yang , Guoqing Guan
As a new type of green solvent with non-volatility, high thermal stability, high conductivity and various adjustable properties, ionic liquid (IL) has been widely used in the capture and electrochemical reduction of carbon dioxide (CO2). To date, many studies have been made to investigate CO2 capture by using different types of ILs and CO2 electrochemical reduction (CO2ER) with ILs as either electrolyte or other catalytic active components. Some structure–activity relationships between the structure and adsorption or catalytic properties of ILs have been found. Herein, the absorption performances and mechanisms of conventional ILs, amino-functionalized ILs, non-amino functionalized ILs and supported ILs for CO2 capture, as well as the performances and action mechanisms of ILs as the electrolyte, electrolyte additive, and/or electrode modifier in the process of CO2ER are summarized. Many researches indicate that the unique interaction between the anion or cation of IL and CO2 has a significant contribution to promote the absorption and conversion of CO2. However, the ILs used for CO2 capture and electrochemical reduction should be further explored. Especially, a more in-depth investigation of the adsorption and catalytic mechanisms with the help of quantum chemical calculation, molecular simulation, and in situ characterization techniques is necessary. It is expected to design and develop more efficient ILs used for CO2 capture and conversion on a large scale.
{"title":"Application of ionic liquids in CO2 capture and electrochemical reduction: A review","authors":"Xiaowei An , Peifen Wang , Xuli Ma , Xiao Du , Xiaogang Hao , Ziyuan Yang , Guoqing Guan","doi":"10.1016/j.crcon.2023.02.003","DOIUrl":"10.1016/j.crcon.2023.02.003","url":null,"abstract":"<div><p>As a new type of green solvent with non-volatility, high thermal stability, high conductivity and various adjustable properties, ionic liquid (IL) has been widely used in the capture and electrochemical reduction of carbon dioxide (CO<sub>2</sub>). To date, many studies have been made to investigate CO<sub>2</sub> capture by using different types of ILs and CO<sub>2</sub> electrochemical reduction (CO<sub>2</sub>ER) with ILs as either electrolyte or other catalytic active components. Some structure–activity relationships between the structure and adsorption or catalytic properties of ILs have been found. Herein, the absorption performances and mechanisms of conventional ILs, amino-functionalized ILs, non-amino functionalized ILs and supported ILs for CO<sub>2</sub> capture, as well as the performances and action mechanisms of ILs as the electrolyte, electrolyte additive, and/or electrode modifier in the process of CO<sub>2</sub>ER are summarized. Many researches indicate that the unique interaction between the anion or cation of IL and CO<sub>2</sub> has a significant contribution to promote the absorption and conversion of CO<sub>2</sub>. However, the ILs used for CO<sub>2</sub> capture and electrochemical reduction should be further explored. Especially, a more in-depth investigation of the adsorption and catalytic mechanisms with the help of quantum chemical calculation, molecular simulation, and <em>in situ</em> characterization techniques is necessary. It is expected to design and develop more efficient ILs used for CO<sub>2</sub> capture and conversion on a large scale.</p></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"6 2","pages":"Pages 85-97"},"PeriodicalIF":6.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48574776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-01DOI: 10.1016/j.crcon.2023.02.002
Zefeng Ge , Xi Cao , Zhenting Zha , Yuna Ma , Mingxun Zeng , Yuqing Wu , Zenghui Hou , Huiyan Zhang
For a gasification process, the char-CO2 gasification is the controlling step worthwhile to be deeply investigated. The article chosen corn stalk (CS), poplar sawdust (PS) and bagasse residue (BR) as the typical waste species derived from agricultural, forestal and industrial sources. The char-CO2 gasification behavior, reaction kinetics and carbon structure were studied to reveal the intrinsic factors determining the reaction kinetics. Generally, the carbon conversion and maximum conversion rate were influenced by the feedstocks species and char preparation temperatures, as influenced by ash proportion, potassium content in ash and carbon structure of char. The char-CO2 reaction for CS was subject more to the catalytic effect of alkali compositions, while pore structure affected more the gasification reaction for PS char. The isoconversional kinetic analysis indicated that the gasification reaction became stable at carbon conversion of 0.5. Subsequently, sectionalized kinetic parameters were calculated for the initial gasification temperature to the temperature reaching 50% conversion. The result showed that high initial gasification temperature increased the char-CO2 gasification barrier to hardly start the reaction but accelerate the reaction rate. The carbon structure analyses further clarified that the reaction activation energy was highly related to the microcrystalline structure of carbon, while the reaction rate was more determined by carbon pore structure.
{"title":"Establishment of correlation between reaction kinetics and carbon structures in the char gasification process","authors":"Zefeng Ge , Xi Cao , Zhenting Zha , Yuna Ma , Mingxun Zeng , Yuqing Wu , Zenghui Hou , Huiyan Zhang","doi":"10.1016/j.crcon.2023.02.002","DOIUrl":"10.1016/j.crcon.2023.02.002","url":null,"abstract":"<div><p>For a gasification process, the char-CO<sub>2</sub> gasification is the controlling step worthwhile to be deeply investigated. The article chosen corn stalk (CS), poplar sawdust (PS) and bagasse residue (BR) as the typical waste species derived from agricultural, forestal and industrial sources. The char-CO<sub>2</sub> gasification behavior, reaction kinetics and carbon structure were studied to reveal the intrinsic factors determining the reaction kinetics. Generally, the carbon conversion and maximum conversion rate were influenced by the feedstocks species and char preparation temperatures, as influenced by ash proportion, potassium content in ash and carbon structure of char. The char-CO<sub>2</sub> reaction for CS was subject more to the catalytic effect of alkali compositions, while pore structure affected more the gasification reaction for PS char. The isoconversional kinetic analysis indicated that the gasification reaction became stable at carbon conversion of 0.5. Subsequently, sectionalized kinetic parameters were calculated for the initial gasification temperature to the temperature reaching 50% conversion. The result showed that high initial gasification temperature increased the char-CO<sub>2</sub> gasification barrier to hardly start the reaction but accelerate the reaction rate. The carbon structure analyses further clarified that the reaction activation energy was highly related to the microcrystalline structure of carbon, while the reaction rate was more determined by carbon pore structure.</p></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"6 2","pages":"Pages 67-75"},"PeriodicalIF":6.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44050238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-01DOI: 10.1016/j.crcon.2022.12.005
Longqing Gao , Xiumin Li , Chao Tang , Tianshuo Xie , Zhengkun Xie , Haimei Li , Guoqing Guan , Jie Liu , Keyong Tang
Soybean can serve as an efficient carbon and nitrogen source for in-situ fabrication of efficient composite electrocatalysts with conductive nitrogen-doped carbon (N-C) material. In this study, the iron-doped cobalt nitride/phosphide (Fe-Co3N/CoP) nanosheet was composited with a conductive N-C material by using soybean as C and N source, as well as NH3 as additional nitrogen source. During the nitridation process of Fe-Co3N, N-C bond was formed as a newly generated Co(Fe)-N-C active sites. Therefore, it fabricates a good microscopic contact interface between the catalyst and carbon material for charge transfer. Besides, the introduction of Fe-CoP by partially phosphating Fe-Co3N further improved the OER activity due to the high catalytic activity of Co sites with high valence state. As a result, the obtained electrocatalyst exhibited overpotentials as low as 285 and 390 mV for supporting 10 and 100 mA/cm−2 current densities. This work indicates that the design of materials with good interfaces could be an effective approach for the preparation of electrocatalysts for water electrolysis.
{"title":"Interface engineering of Fe-Co3N/CoP composite with N-doped C by using soybean: Fabrication of efficient electrocatalysts for oxygen evolution reaction","authors":"Longqing Gao , Xiumin Li , Chao Tang , Tianshuo Xie , Zhengkun Xie , Haimei Li , Guoqing Guan , Jie Liu , Keyong Tang","doi":"10.1016/j.crcon.2022.12.005","DOIUrl":"https://doi.org/10.1016/j.crcon.2022.12.005","url":null,"abstract":"<div><p>Soybean can serve as an efficient carbon and nitrogen source for <em>in-situ</em> fabrication of efficient composite electrocatalysts with conductive nitrogen-doped carbon (N-C) material. In this study, the iron-doped cobalt nitride/phosphide (Fe-Co<sub>3</sub>N/CoP) nanosheet was composited with a conductive N-C material by using soybean as C and N source, as well as NH<sub>3</sub> as additional nitrogen source. During the nitridation process of Fe-Co<sub>3</sub>N, N-C bond was formed as a newly generated Co(Fe)-N-C active sites. Therefore, it fabricates a good microscopic contact interface between the catalyst and carbon material for charge transfer. Besides, the introduction of Fe-CoP by partially phosphating Fe-Co<sub>3</sub>N further improved the OER activity due to the high catalytic activity of Co sites with high valence state. As a result, the obtained electrocatalyst exhibited overpotentials as low as 285 and 390 mV for supporting 10 and 100 mA/cm<sup>−2</sup> current densities. This work indicates that the design of materials with good interfaces could be an effective approach for the preparation of electrocatalysts for water electrolysis.</p></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"6 2","pages":"Pages 98-105"},"PeriodicalIF":6.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49705038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The suitability of the abundant agro-industrial residues wheat straw (WS; control), barley and oats straw (BOS) and rice husk (RH), supplemented with various sources of oils (sunflower, corn oil), nitrogen (peptone, yeast extract) and calcium salts (CaSO4·2H2O, CaCl2), as novel substrates in solid-state fermentation of selected Pleurotus ostreatus and P. eryngii mushrooms was investigated. The possible effect of different additives on mycelial growth rate, biomass production and endoglucanase, laccase and lipase biosynthesis were evaluated. Moreover, their impact on essential cultivation aspects (earliness, total mushroom yield, biological efficiency) and carposome quality parameters (weight, morphological characteristics) was assessed. Both fungi showed their highest growth rates on BOS substrates and the most positive implementation was CaSO4·2H2O 6 % w/w (Kr = 9.58 mm/ day; P. ostreatus, Kr = 9.42 mm/ day; P. eryngii), while different additives led to enhancement of biomass production. Pleurotus species demonstrated minimal levels of endoglucanase activity, with values ranging from 0.01 to 0.42 U/g of dry weight, regardless of the substrate and the stage of colonization. On the contrary, the maximum values of laccase activity were observed at 50 % of colonization on BOS and RH, while supplementation with nitrogen and calcium sources positively affected its biosynthesis. P. ostreatus and P. eryngii cultivated on BOS supplemented with peptone at 2 and 5 % w/w, synthesized significant laccase amounts, i.e., 12,165.78 and 8,624.55 U/g d.w., respectively. Satisfactory amounts of lipase were produced, especially in substrates supplemented with sunflower 2 % w/w, in quantities up to 1.42 U/g d.w., whereas the highest lipase activity was achieved by P. eryngii on WS supplemented with corn oil at 2 % w/w, with a value of 4.25 U/g d.w. being recorded. Regarding fermentation of Pleurotus species in polypropylene bags, WS and BOS supported faster colonization and shorter earliness period than RH substrates, whereas supplementation did not seem to affect these culture parameters. Furthermore, oils supplementation had a positive effect on BE of both species, with values up to 100 % for P. ostreatus and 80 % for P. eryngii on WS and BOS, whereas on RH the lowest BE values were detected. Morphological characteristics were not significantly affected by the additives. Results indicate the positive impact that certain additives have on mushroom productivity and production of enzymes with great financial and environmental importance.
{"title":"Carposome productivity of Pleurotus ostreatus and Pleurotus eryngii growing on agro-industrial residues enriched with nitrogen, calcium salts and oils","authors":"Marianna Dedousi , Eirini-Maria Melanouri , Panagiota Diamantopoulou","doi":"10.1016/j.crcon.2023.02.001","DOIUrl":"10.1016/j.crcon.2023.02.001","url":null,"abstract":"<div><p>The suitability of the abundant agro-industrial residues wheat straw (WS; control), barley and oats straw (BOS) and rice husk (RH), supplemented with various sources of oils (sunflower, corn oil), nitrogen (peptone, yeast extract) and calcium salts (CaSO<sub>4</sub>·2H<sub>2</sub>O, CaCl<sub>2</sub>), as novel substrates in solid-state fermentation of selected <em>Pleurotus ostreatus</em> and <em>P. eryngii</em> mushrooms was investigated. The possible effect of different additives on mycelial growth rate, biomass production and endoglucanase, laccase and lipase biosynthesis were evaluated. Moreover, their impact on essential cultivation aspects (earliness, total mushroom yield, biological efficiency) and carposome quality parameters (weight, morphological characteristics) was assessed. Both fungi showed their highest growth rates on BOS substrates and the most positive implementation was CaSO<sub>4</sub>·2H<sub>2</sub>O 6 % w/w (Kr = 9.58 mm/ day; <em>P. ostreatus</em>, Kr = 9.42 mm/ day; <em>P. eryngii</em>), while different additives led to enhancement of biomass production. <em>Pleurotus</em> species demonstrated minimal levels of endoglucanase activity, with values ranging from 0.01 to 0.42 U/g of dry weight, regardless of the substrate and the stage of colonization. On the contrary, the maximum values of laccase activity were observed at 50 % of colonization on BOS and RH, while supplementation with nitrogen and calcium sources positively affected its biosynthesis. <em>P. ostreatus</em> and <em>P. eryngii</em> cultivated on BOS supplemented with peptone at 2 and 5 % w/w, synthesized significant laccase amounts, i.e., 12,165.78 and 8,624.55 U/g d.w., respectively. Satisfactory amounts of lipase were produced, especially in substrates supplemented with sunflower 2 % w/w, in quantities up to 1.42 U/g d.w., whereas the highest lipase activity was achieved by <em>P. eryngii</em> on WS supplemented with corn oil at 2 % w/w, with a value of 4.25 U/g d.w. being recorded. Regarding fermentation of <em>Pleurotus</em> species in polypropylene bags, WS and BOS supported faster colonization and shorter earliness period than RH substrates, whereas supplementation did not seem to affect these culture parameters. Furthermore, oils supplementation had a positive effect on BE of both species, with values up to 100 % for <em>P. ostreatus</em> and 80 % for <em>P. eryngii</em> on WS and BOS, whereas on RH the lowest BE values were detected. Morphological characteristics were not significantly affected by the additives. Results indicate the positive impact that certain additives have on mushroom productivity and production of enzymes with great financial and environmental importance.</p></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"6 2","pages":"Pages 150-165"},"PeriodicalIF":6.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43942706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Waste pulp (WP) is a typical byproduct of paper industry, and Chemical-looping gasification (CLG) as a recently developed technology is highly suited to dispose high-volatile wastes like WP. In order to make a high-efficiency oxygen carrier (OC) for CLG of WP, the Ni-containing electroplating sludge (NES) was used as the matrix and NiO modification was performed to enhance the hydrogen production in CLG. These resulted in a potentially high-efficiency OC denoted as NNES. Testing CLG of WP was in a fixed-bed reactor at 850 °C by adopting NNES as the OC, injecting 2.4 mL/g(WP) water, and keeping a mass ratio of 1.0 between OC to WP. It produced 1.73 Nm3/kg syngas that has an LHV of 11.9 MJ/Nm3 and a H2/CO ratio of 3.63. In 10 redox cycles, the syngas yield did not have obvious decrease, but a certain reduction in the activity of NNES was observed. Characterization of the spent NNES revealed that it is the Ni agglomeration and inert silicate generation which reduced the activity of NNES.
{"title":"Waste pulp chemical-looping gasification using Ni-modified electroplating sludge as an oxygen carrier","authors":"Genyang Tang , Jing Gu , Guoqiang Wei , Haoran Yuan , Yong Chen","doi":"10.1016/j.crcon.2022.12.002","DOIUrl":"10.1016/j.crcon.2022.12.002","url":null,"abstract":"<div><p>Waste pulp (WP) is a typical byproduct of paper industry, and Chemical-looping gasification (CLG) as a recently developed technology is highly suited to dispose high-volatile wastes like WP. In order to make a high-efficiency oxygen carrier (OC) for CLG of WP, the Ni-containing electroplating sludge (NES) was used as the matrix and NiO modification was performed to enhance the hydrogen production in CLG. These resulted in a potentially high-efficiency OC denoted as NNES. Testing CLG of WP was in a fixed-bed reactor at 850 °C by adopting NNES as the OC, injecting 2.4 mL/g(WP) water, and keeping a mass ratio of 1.0 between OC to WP. It produced 1.73 Nm<sup>3</sup>/kg syngas that has an LHV of 11.9 MJ/Nm<sup>3</sup> and a H<sub>2</sub>/CO ratio of 3.63. In 10 redox cycles, the syngas yield did not have obvious decrease, but a certain reduction in the activity of NNES was observed. Characterization of the spent NNES revealed that it is the Ni agglomeration and inert silicate generation which reduced the activity of NNES.</p></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"6 2","pages":"Pages 106-115"},"PeriodicalIF":6.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47615604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-18DOI: 10.1016/j.crcon.2023.05.004
Ahmad Nuruddin , Adhitya Gandaryus Saputro , Arifin Luthfi Maulana , Febdian Rusydi , Fiki Taufik Akbar , Hadi Teguh Yudistira , Hermawan Kresno Dipojono
We study the carbon dioxide reduction reaction (CO2RR) activity and selectivity of Fe single-atom catalyst (Fe-SAC) and Fe dual-atom catalyst (Fe-DAC) active sites at the interior of graphene and the edges of graphitic nanopore by using a combination of DFT calculations and microkinetic simulations. The trend of limiting potentials for CO2RR to produce CO can be described by using either the adsorption energy of COOH, CO, or their combination. CO2RR process with reasonable reaction rates can be achieved only on the active site configurations with weak tendencies toward CO poisoning. The efficiency of CO2RR on a catalyst depends on its ability to suppress the parasitic hydrogen evolution reaction (HER), which is directly related to the behavior of H adsorption on the catalyst’s active site. We find that the edges of the graphitic nanopore can act as potential adsorption sites for an H atom, and in some cases, the edge site can bind the H atom much stronger than the main Fe site. The linear scaling between CO and H adsorptions is broken if this condition is met. This condition also allows some edge active site configurations to have their CO2RR limiting potential lower than the HER process favoring CO production over H2 production.
{"title":"Selectivity of CO2 reduction reaction to CO on the graphitic edge active sites of Fe-single-atom and dual-atom catalysts: A combined DFT and microkinetic modeling","authors":"Ahmad Nuruddin , Adhitya Gandaryus Saputro , Arifin Luthfi Maulana , Febdian Rusydi , Fiki Taufik Akbar , Hadi Teguh Yudistira , Hermawan Kresno Dipojono","doi":"10.1016/j.crcon.2023.05.004","DOIUrl":"10.1016/j.crcon.2023.05.004","url":null,"abstract":"<div><p>We study the carbon dioxide reduction reaction (CO<sub>2</sub>RR) activity and selectivity of Fe single-atom catalyst (Fe-SAC) and Fe dual-atom catalyst (Fe-DAC) active sites at the interior of graphene and the edges of graphitic nanopore by using a combination of DFT calculations and microkinetic simulations. The trend of limiting potentials for CO<sub>2</sub>RR to produce CO can be described by using either the adsorption energy of COOH, CO, or their combination. CO<sub>2</sub>RR process with reasonable reaction rates can be achieved only on the active site configurations with weak tendencies toward CO poisoning. The efficiency of CO<sub>2</sub>RR on a catalyst depends on its ability to suppress the parasitic hydrogen evolution reaction (HER), which is directly related to the behavior of H adsorption on the catalyst’s active site. We find that the edges of the graphitic nanopore can act as potential adsorption sites for an H atom, and in some cases, the edge site can bind the H atom much stronger than the main Fe site. The linear scaling between CO and H adsorptions is broken if this condition is met. This condition also allows some edge active site configurations to have their CO<sub>2</sub>RR limiting potential lower than the HER process favoring CO production over H<sub>2</sub> production.</p></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"7 1","pages":"Article 100185"},"PeriodicalIF":6.0,"publicationDate":"2023-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2588913323000406/pdfft?md5=7171ae94111023454fd4eb90abe637a1&pid=1-s2.0-S2588913323000406-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49247946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-16DOI: 10.1016/j.crcon.2023.05.003
Xiao Fan , Kaiying Wang , Xiaoqing He , Shiguang Li , Miao Yu , Xinhua Liang
A series of palladium-modified (Pd-modified) CuO-ZnO-Al2O3 (CZA) catalysts with various Pd loadings (0.3 wt% to 2.4 wt%) were prepared using the wetness impregnation method, on two CZA supports with different structures that are CZA-aged precursor composed of a mixture of zincian-malachite and hydrotalcite-like phases (CZA-zH), and CuO-ZnO-Al2O3 metal oxide nanoparticles (CZA-MO). Enhancement on catalytic activity can be observed on both Pd-modified CZA catalysts in a temperature range of 180–240 °C for methanol synthesis via CO2 hydrogenation. Pd/CZA-zH catalysts exhibited a more efficient and stable production of methanol at a relatively low reaction temperature of 180 °C for 100 hrs of reaction. The improvement of activity is mainly ascribed to a higher surface area and abundant oxygen-containing functional groups (e.g., –OH) of CZA-zH support, which is beneficial for better adsorption and distribution of Pd promoter. Hydrogen temperature programmed reduction and X-ray photoelectron spectroscopy results demonstrated a better interaction between Pd and Cu on Pd/CZA-zH catalysts via enhanced reducibility of CuO, and peak shift of Cu to a lower binding energy. The difference in the efficient utilization of hydrogen spillover effect of Pd promoter over two CZA supports resulted in the different performances for methanol synthesis under mild reaction conditions.
{"title":"Pd-modified CuO-ZnO-Al2O3 catalysts via mixed-phases-containing precursor for methanol synthesis from CO2 hydrogenation under mild conditions","authors":"Xiao Fan , Kaiying Wang , Xiaoqing He , Shiguang Li , Miao Yu , Xinhua Liang","doi":"10.1016/j.crcon.2023.05.003","DOIUrl":"10.1016/j.crcon.2023.05.003","url":null,"abstract":"<div><p>A series of palladium-modified (Pd-modified) CuO-ZnO-Al<sub>2</sub>O<sub>3</sub> (CZA) catalysts with various Pd loadings (0.3 wt% to 2.4 wt%) were prepared using the wetness impregnation method, on two CZA supports with different structures that are CZA-aged precursor composed of a mixture of zincian-malachite and hydrotalcite-like phases (CZA-zH), and CuO-ZnO-Al<sub>2</sub>O<sub>3</sub> metal oxide nanoparticles (CZA-MO). Enhancement on catalytic activity can be observed on both Pd-modified CZA catalysts in a temperature range of 180–240 °C for methanol synthesis via CO<sub>2</sub> hydrogenation. Pd/CZA-zH catalysts exhibited a more efficient and stable production of methanol at a relatively low reaction temperature of 180 °C for 100 hrs of reaction. The improvement of activity is mainly ascribed to a higher surface area and abundant oxygen-containing functional groups (e.g., –OH) of CZA-zH support, which is beneficial for better adsorption and distribution of Pd promoter. Hydrogen temperature programmed reduction and X-ray photoelectron spectroscopy results demonstrated a better interaction between Pd and Cu on Pd/CZA-zH catalysts via enhanced reducibility of CuO, and peak shift of Cu to a lower binding energy. The difference in the efficient utilization of hydrogen spillover effect of Pd promoter over two CZA supports resulted in the different performances for methanol synthesis under mild reaction conditions.</p></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"7 1","pages":"Article 100184"},"PeriodicalIF":6.0,"publicationDate":"2023-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S258891332300039X/pdfft?md5=5b83c1dacc8aa0d0615f24fbc27cf82c&pid=1-s2.0-S258891332300039X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44150189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-16DOI: 10.1016/j.crcon.2023.05.002
Edy Hartulistiyoso , Obie Farobie , Latifa A Anis , Novi Syaftika , Asep Bayu , Apip Amrullah , Navid R. Moheimani , Surachai Karnjanakom , Yukihiko Matsumura
This study investigates the simultaneous production of hydrochar and bioactive compounds from Ulva lactuca via a hydrothermal process. The experiment was carried out using a batch reaction vessel at different reaction temperatures of 180–220 °C and various holding times of 30–90 min. As expected, both temperature and time vigorously influenced hydrochar and bioactive compound production. The maximum hydrochar yield was at 32.4 wt%. The higher heating value (HHV) of hydrochar was observed in the range of 17.68–21.07 MJ kg−1, near the energy content of low-rank coals. The hydrochars exhibited contact angles higher than 90° (i.e., 94-108°) for a longer time, confirming their hydrophobic surfaces. The scanning electron microscope analysis (SEM) showed that the hydrothermal process enables cracks in the spherical shape of raw U. lactuca into small and porous particles. Besides producing hydrochar, the hydrothermal process of U. lactuca also gives promising antioxidants and phenolics as bioactive compounds. The highest total phenolic content and antioxidant activity could be achieved in hydrolysate at 200 °C and 30 min with the value of 1.20 ± 0.12 mg/g and 71.6 ± 1.3%, respectively.
{"title":"Co-production of hydrochar and bioactive compounds from Ulva lactuca via a hydrothermal process","authors":"Edy Hartulistiyoso , Obie Farobie , Latifa A Anis , Novi Syaftika , Asep Bayu , Apip Amrullah , Navid R. Moheimani , Surachai Karnjanakom , Yukihiko Matsumura","doi":"10.1016/j.crcon.2023.05.002","DOIUrl":"10.1016/j.crcon.2023.05.002","url":null,"abstract":"<div><p>This study investigates the simultaneous production of hydrochar and bioactive compounds from <em>Ulva lactuca</em> via a hydrothermal process. The experiment was carried out using a batch reaction vessel at different reaction temperatures of 180–220 °C and various holding times of 30–90 min. As expected, both temperature and time vigorously influenced hydrochar and bioactive compound production. The maximum hydrochar yield was at 32.4 wt%. The higher heating value (HHV) of hydrochar was observed in the range of 17.68–21.07 MJ kg<sup>−1</sup>, near the energy content of low-rank coals. The hydrochars exhibited contact angles higher than 90° (i.e., 94-108°) for a longer time, confirming their hydrophobic surfaces. The scanning electron microscope analysis (SEM) showed that the hydrothermal process enables cracks in the spherical shape of raw <em>U. lactuca</em> into small and porous particles. Besides producing hydrochar, the hydrothermal process of <em>U. lactuca</em> also gives promising antioxidants and phenolics as bioactive compounds. The highest total phenolic content and antioxidant activity could be achieved in hydrolysate at 200 °C and 30 min with the value of 1.20 ± 0.12 mg/g and 71.6 ± 1.3%, respectively.</p></div>","PeriodicalId":52958,"journal":{"name":"Carbon Resources Conversion","volume":"7 1","pages":"Article 100183"},"PeriodicalIF":6.0,"publicationDate":"2023-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2588913323000388/pdfft?md5=e9817f3fb6cb0d9a84de8f6aa4070802&pid=1-s2.0-S2588913323000388-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48667463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}