{"title":"超临界CO2条件下醋酸丙酯在活性炭上的吸附平衡","authors":"Eisuke Matsumoto, Mahmoud Magdy Azim, Shigeki Takishima, Ikuo Ushiki","doi":"10.1080/00219592.2023.2256366","DOIUrl":null,"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":0.6000,"publicationDate":"2023-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"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\":null,\"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\":0.6000,\"publicationDate\":\"2023-09-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Chemical Engineering of Japan\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1080/00219592.2023.2256366\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Chemical Engineering of Japan","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1080/00219592.2023.2256366","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Adsorption Equilibria of Propyl Acetate on Activated Carbon Under Supercritical CO2 Conditions
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.
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The Journal of Chemical Engineering of Japan (JCEJ) is a monthly publication in English of the Society of Chemical Engineers, Japan. The first issue appeared in 1968. JCEJ publishes timely original research in the broad field of chemical engineering ranging from fundamental principles to practical applications. JCEJ is an international research journal and invites your contributions and subscriptions.
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