The formation conditions of yttria-stabilized zirconia (YSZ) thin films using the aerosol deposition (AD) method were investigated for developing a metal-supported solid oxide fuel cell (SOFC) equipped with the YSZ electrolyte. Using the AD method under mild conditions with a carrier gas flow rate of 4 L/min, a dense YSZ thin film can be formed at room temperature on both a stainless steel plate as the support and an anode layer heat treated at 1050 °C of the SOFC. Further, a metal-supported SOFC equipped with the aerosol-deposited YSZ electrolyte can be fabricated at a heat-treatment temperature of 1050 °C or less throughout the production process. An open-circuit voltage of 1.05 V and a power density of ca. 0.17 W/cm2 at 0.8 V were confirmed in the obtained metal-supported SOFC operated at 750 °C.
{"title":"Formation of Dense Yttria-Stabilized Zirconia Thin Film by Aerosol Deposition Method for Metal-Supported Solid Oxide Fuel Cell Applications","authors":"Kyohei Manabe, Mitsuaki Echigo, Yuji Tsuda, Kazuyuki Minami, Jun Akedo, Hisao Ohnishi","doi":"10.1080/00219592.2023.2261771","DOIUrl":"https://doi.org/10.1080/00219592.2023.2261771","url":null,"abstract":"The formation conditions of yttria-stabilized zirconia (YSZ) thin films using the aerosol deposition (AD) method were investigated for developing a metal-supported solid oxide fuel cell (SOFC) equipped with the YSZ electrolyte. Using the AD method under mild conditions with a carrier gas flow rate of 4 L/min, a dense YSZ thin film can be formed at room temperature on both a stainless steel plate as the support and an anode layer heat treated at 1050 °C of the SOFC. Further, a metal-supported SOFC equipped with the aerosol-deposited YSZ electrolyte can be fabricated at a heat-treatment temperature of 1050 °C or less throughout the production process. An open-circuit voltage of 1.05 V and a power density of ca. 0.17 W/cm2 at 0.8 V were confirmed in the obtained metal-supported SOFC operated at 750 °C.","PeriodicalId":15331,"journal":{"name":"Journal of Chemical Engineering of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135388634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The regeneration of spent activated carbon used to adsorb alkyl acetates, which are the main volatile organic compounds (VOCs) used in the printing industry, is important because of numerous economic and environmental factors. Regeneration by supercritical CO2 (scCO2) avoids the high temperatures associated with the commonly used thermal regeneration method, which may damage the activated carbon. However, previous studies cover only a limited range of operating conditions, and more extensive research is required for better understanding the scCO2 process. In this study, the adsorption equilibria of propyl acetate on activated carbon in scCO2 were investigated using the fixed-bed adsorption method at 313 K–353 K and 10 MPa–20 MPa. Our results agree with previous reports of other VOCs on the effect of temperature and pressure on adsorption equilibria. Furthermore, the Dubinin–Astakhov (DA) equation is used to correlate the measured data with an average relative deviation of 5.6%. Evidently, the adsorbed amounts of propyl acetate are higher than those of ethyl acetate but lower than those of butyl acetate, which can be attributed to their different volatilities in scCO2 and different affinities for the used adsorbent.
{"title":"Adsorption Equilibria of Propyl Acetate on Activated Carbon Under Supercritical CO<sub>2</sub> Conditions","authors":"Eisuke Matsumoto, Mahmoud Magdy Azim, Shigeki Takishima, Ikuo Ushiki","doi":"10.1080/00219592.2023.2256366","DOIUrl":"https://doi.org/10.1080/00219592.2023.2256366","url":null,"abstract":"The regeneration of spent activated carbon used to adsorb alkyl acetates, which are the main volatile organic compounds (VOCs) used in the printing industry, is important because of numerous economic and environmental factors. Regeneration by supercritical CO2 (scCO2) avoids the high temperatures associated with the commonly used thermal regeneration method, which may damage the activated carbon. However, previous studies cover only a limited range of operating conditions, and more extensive research is required for better understanding the scCO2 process. In this study, the adsorption equilibria of propyl acetate on activated carbon in scCO2 were investigated using the fixed-bed adsorption method at 313 K–353 K and 10 MPa–20 MPa. Our results agree with previous reports of other VOCs on the effect of temperature and pressure on adsorption equilibria. Furthermore, the Dubinin–Astakhov (DA) equation is used to correlate the measured data with an average relative deviation of 5.6%. Evidently, the adsorbed amounts of propyl acetate are higher than those of ethyl acetate but lower than those of butyl acetate, which can be attributed to their different volatilities in scCO2 and different affinities for the used adsorbent.","PeriodicalId":15331,"journal":{"name":"Journal of Chemical Engineering of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134911210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ammonia methanation is a reaction that synthesizes methane directly from carbon dioxide and ammonia. The Sabatier reaction, which synthesizes methane by hydrogenating carbon dioxide, requires a cooling facility in the reactor due to its large heat value. On the other hand, hydrogen is supposed to be transported as a hydrogen energy carrier such as ammonia, and energy must be injected to produce hydrogen from them. The ammonia methanation reaction, in which these two reactions proceed simultaneously, has a low heat of reaction and can be constructed using an adiabatic reactor. In this study, the ammonia methanation reaction with a hybrid catalyst that combines an ammonia decomposition catalyst and a Sabatier reaction catalyst as powders was investigated. Precipitated iron catalyst modified with alumina and potassium showed good activity for ammonia decomposition. Ammonia methanation reaction was carried out using a hybrid catalyst combining modified precipitated iron catalyst and Ni/CeO2 catalyst, but almost no methane was obtained. This is presumed to be due to the formation of CeFeO3, which is a composite oxide, the shrinkage of the pores of CeO2, and the alteration of Ni. Therefore, in order to reduce the number of contact points between the precipitated iron catalyst and the Ni/CeO2 catalyst, they were formed into particles and mixed to conduct the ammonia methanation reaction. However, although methane was produced, a sufficient yield was not obtained. Ni/Al2O3 catalyst also showed good activity for ammonia decomposition reaction. A hybrid catalyst consisting of Ni/Al2O3 and Ni/CeO2 catalysts was used for the ammonia methanation reaction, and a high methane yield of over 60% was obtained.
{"title":"Ammonia Methanation of Carbon Dioxide with a Hybrid Catalyst","authors":"Hitoshi Saima, Reiji Sunamoto, Hiroki Miyaoka, Takayuki Ichikawa","doi":"10.1080/00219592.2023.2248176","DOIUrl":"https://doi.org/10.1080/00219592.2023.2248176","url":null,"abstract":"Ammonia methanation is a reaction that synthesizes methane directly from carbon dioxide and ammonia. The Sabatier reaction, which synthesizes methane by hydrogenating carbon dioxide, requires a cooling facility in the reactor due to its large heat value. On the other hand, hydrogen is supposed to be transported as a hydrogen energy carrier such as ammonia, and energy must be injected to produce hydrogen from them. The ammonia methanation reaction, in which these two reactions proceed simultaneously, has a low heat of reaction and can be constructed using an adiabatic reactor. In this study, the ammonia methanation reaction with a hybrid catalyst that combines an ammonia decomposition catalyst and a Sabatier reaction catalyst as powders was investigated. Precipitated iron catalyst modified with alumina and potassium showed good activity for ammonia decomposition. Ammonia methanation reaction was carried out using a hybrid catalyst combining modified precipitated iron catalyst and Ni/CeO2 catalyst, but almost no methane was obtained. This is presumed to be due to the formation of CeFeO3, which is a composite oxide, the shrinkage of the pores of CeO2, and the alteration of Ni. Therefore, in order to reduce the number of contact points between the precipitated iron catalyst and the Ni/CeO2 catalyst, they were formed into particles and mixed to conduct the ammonia methanation reaction. However, although methane was produced, a sufficient yield was not obtained. Ni/Al2O3 catalyst also showed good activity for ammonia decomposition reaction. A hybrid catalyst consisting of Ni/Al2O3 and Ni/CeO2 catalysts was used for the ammonia methanation reaction, and a high methane yield of over 60% was obtained.","PeriodicalId":15331,"journal":{"name":"Journal of Chemical Engineering of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134911211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-13DOI: 10.1080/00219592.2023.2256377
Shinsuke Nagamine, Mika Akagi, Kyuya Nakagawa, Takashi Kobayashi
Meat substitutes production using plant-derived materials is attracting attentions as a solution for sustainable protein supply. We have previously reported the fabrication of soy protein-based fibers by combination of wet spinning and ionic cross-linking of alginate. In this study, we focused on the calcium ion concentration in the coagulant solution and alginate concentration in the spinning solution, which are determinant factors for in the gelation of alginate. The fiber diameter was reduced by increasing calcium ion concentration, probably due to the dehydration from fiber induced by osmotic pressure difference with coagulant solution and the suppression of swelling of fiber by the rapid gelation. The hardness of fibers evaluated by texture analysis increased as the concentrations of alginate and calcium ion increased, while the springiness increased with increasing calcium ion concentration but decreased with alginate concentration. The controlling the structure and texture of fibers by the compositions of spinning and coagulant solutions would improve their applicability to meat substitutes.
{"title":"Effect of Coagulant Concentration on Soy Protein-Based Fiber for Meat Substitute by Wet Spinning Combined with Ionic Cross-Linking of Alginate","authors":"Shinsuke Nagamine, Mika Akagi, Kyuya Nakagawa, Takashi Kobayashi","doi":"10.1080/00219592.2023.2256377","DOIUrl":"https://doi.org/10.1080/00219592.2023.2256377","url":null,"abstract":"Meat substitutes production using plant-derived materials is attracting attentions as a solution for sustainable protein supply. We have previously reported the fabrication of soy protein-based fibers by combination of wet spinning and ionic cross-linking of alginate. In this study, we focused on the calcium ion concentration in the coagulant solution and alginate concentration in the spinning solution, which are determinant factors for in the gelation of alginate. The fiber diameter was reduced by increasing calcium ion concentration, probably due to the dehydration from fiber induced by osmotic pressure difference with coagulant solution and the suppression of swelling of fiber by the rapid gelation. The hardness of fibers evaluated by texture analysis increased as the concentrations of alginate and calcium ion increased, while the springiness increased with increasing calcium ion concentration but decreased with alginate concentration. The controlling the structure and texture of fibers by the compositions of spinning and coagulant solutions would improve their applicability to meat substitutes.","PeriodicalId":15331,"journal":{"name":"Journal of Chemical Engineering of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135734912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-31DOI: 10.1080/00219592.2023.2251529
Motomu Sakai, Yuta Nomura, M. Matsukata
{"title":"Strategy of Development on Zeolite Membrane for Forward Osmosis Operation; Effects of Structural Parameter of Support Layer and Si/Al Ratio of ZSM-5 Layer on Water Flux","authors":"Motomu Sakai, Yuta Nomura, M. Matsukata","doi":"10.1080/00219592.2023.2251529","DOIUrl":"https://doi.org/10.1080/00219592.2023.2251529","url":null,"abstract":"","PeriodicalId":15331,"journal":{"name":"Journal of Chemical Engineering of Japan","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48621510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-30DOI: 10.1080/00219592.2023.2247031
Yoshiya Matsukawa, Risa Shinohara, Arata Kanno, Y. Saito, Y. Matsushita, H. Aoki
{"title":"Modification of Detailed Kinetic Mechanism for Aromatic Hydrocarbon Formation during C3–C4 Hydrocarbon Pyrolysis","authors":"Yoshiya Matsukawa, Risa Shinohara, Arata Kanno, Y. Saito, Y. Matsushita, H. Aoki","doi":"10.1080/00219592.2023.2247031","DOIUrl":"https://doi.org/10.1080/00219592.2023.2247031","url":null,"abstract":"","PeriodicalId":15331,"journal":{"name":"Journal of Chemical Engineering of Japan","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48265591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-29DOI: 10.1080/00219592.2023.2247783
Young‐Sang Cho
{"title":"Modeling of Porous Catalytic Pellets with Various Morphologies Suspended in Batch Reactor and CSTR from Analytical Solutions of Reaction-Diffusion Equations","authors":"Young‐Sang Cho","doi":"10.1080/00219592.2023.2247783","DOIUrl":"https://doi.org/10.1080/00219592.2023.2247783","url":null,"abstract":"","PeriodicalId":15331,"journal":{"name":"Journal of Chemical Engineering of Japan","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42235019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-22DOI: 10.1080/00219592.2023.2238770
Yuta Nakatsuchi, A. Hamasaki, Haruka Kido, T. Iwato
{"title":"Novel Identification Method of Seawater Contamination into Steam-Water Circuit Including Carbon Dioxide of Power Plants Based on pH, Specific Conductivity, and Cation Conductivity","authors":"Yuta Nakatsuchi, A. Hamasaki, Haruka Kido, T. Iwato","doi":"10.1080/00219592.2023.2238770","DOIUrl":"https://doi.org/10.1080/00219592.2023.2238770","url":null,"abstract":"","PeriodicalId":15331,"journal":{"name":"Journal of Chemical Engineering of Japan","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44105245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-18DOI: 10.1080/00219592.2023.2247046
Li-yong Wang, Y. Okano, I. Horiguchi, Jiangao Zhang
{"title":"Bayesian Optimization for Favourable Suspension Culture of Orbitally Shaken Bioreactors with a Hollow Cylinder Wall","authors":"Li-yong Wang, Y. Okano, I. Horiguchi, Jiangao Zhang","doi":"10.1080/00219592.2023.2247046","DOIUrl":"https://doi.org/10.1080/00219592.2023.2247046","url":null,"abstract":"","PeriodicalId":15331,"journal":{"name":"Journal of Chemical Engineering of Japan","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45403677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-10DOI: 10.1080/00219592.2023.2239287
K. Onoe, Y. Uemura, A. Takeshita
{"title":"Persistent Free Radicals (PFRs) Formed in Pyrolyzed Synthetic CHO-Type Polymers: Novel Raw Material for PFR and Better Understanding for Its Formation","authors":"K. Onoe, Y. Uemura, A. Takeshita","doi":"10.1080/00219592.2023.2239287","DOIUrl":"https://doi.org/10.1080/00219592.2023.2239287","url":null,"abstract":"","PeriodicalId":15331,"journal":{"name":"Journal of Chemical Engineering of Japan","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44326969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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