{"title":"糠醛气相加氢制糠醇过程中 Cu/SiO2 催化剂的失活机理","authors":"Dong-dong YU , Xin-rui YU , Ya-jing ZHANG , Kang-jun WANG","doi":"10.1016/S1872-5813(23)60362-7","DOIUrl":null,"url":null,"abstract":"<div><p>The Cu/SiO<sub>2</sub> catalysts were prepared by co-precipitation and tested for hydrogenation of furfural to furfuryl alcohol in a fixed bed reactor. The deactivation mechanism of the catalysts was investigated by characterization of H<sub>2</sub>-TPR, ICP-OES, XPS, TG, Raman and TEM. Under the conditions of atmospheric pressure, reaction temperature of 140 °C, mass space velocity of 2.4 h<sup>–1</sup> and the molar ratio of hydrogen to furfural of 9.7, the furfural conversion was higher than 97% in the first 5 h. However, the conversion of furfural decreased rapidly from 96% to 32% after 21 h of reaction, indicating that Cu/SiO<sub>2</sub> catalyst was rapidly deactivated. The factors for the deactivation of Cu/SiO<sub>2</sub> catalyst were the agglomeration and sintering of the active component copper. Moreover, the carbon deposition on the catalyst surface resulted in the covered active site Cu<sup>0</sup>.</p></div>","PeriodicalId":15956,"journal":{"name":"燃料化学学报","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Deactivation mechanism of Cu/SiO2 catalyst in gas phase hydrogenation of furfural to furfuryl alcohol\",\"authors\":\"Dong-dong YU , Xin-rui YU , Ya-jing ZHANG , Kang-jun WANG\",\"doi\":\"10.1016/S1872-5813(23)60362-7\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The Cu/SiO<sub>2</sub> catalysts were prepared by co-precipitation and tested for hydrogenation of furfural to furfuryl alcohol in a fixed bed reactor. The deactivation mechanism of the catalysts was investigated by characterization of H<sub>2</sub>-TPR, ICP-OES, XPS, TG, Raman and TEM. Under the conditions of atmospheric pressure, reaction temperature of 140 °C, mass space velocity of 2.4 h<sup>–1</sup> and the molar ratio of hydrogen to furfural of 9.7, the furfural conversion was higher than 97% in the first 5 h. However, the conversion of furfural decreased rapidly from 96% to 32% after 21 h of reaction, indicating that Cu/SiO<sub>2</sub> catalyst was rapidly deactivated. The factors for the deactivation of Cu/SiO<sub>2</sub> catalyst were the agglomeration and sintering of the active component copper. Moreover, the carbon deposition on the catalyst surface resulted in the covered active site Cu<sup>0</sup>.</p></div>\",\"PeriodicalId\":15956,\"journal\":{\"name\":\"燃料化学学报\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2023-12-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"燃料化学学报\",\"FirstCategoryId\":\"1087\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1872581323603627\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"Energy\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"燃料化学学报","FirstCategoryId":"1087","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1872581323603627","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Energy","Score":null,"Total":0}
引用次数: 0
摘要
通过共沉淀法制备了 Cu/SiO2 催化剂，并在固定床反应器中进行了糠醛加氢制糠醇的测试。通过 H2-TPR、ICP-OES、XPS、TG、拉曼和 TEM 表征研究了催化剂的失活机理。在常压、反应温度为 140 ℃、质量空间速度为 2.4 h-1、氢气与糠醛摩尔比为 9.7 的条件下，前 5 h 的糠醛转化率高于 97%，但反应 21 h 后，糠醛转化率从 96%迅速下降到 32%，表明 Cu/SiO2 催化剂迅速失活。导致 Cu/SiO2 催化剂失活的因素是活性成分铜的团聚和烧结。此外，催化剂表面的碳沉积导致活性位点 Cu0 被覆盖。
Deactivation mechanism of Cu/SiO2 catalyst in gas phase hydrogenation of furfural to furfuryl alcohol
The Cu/SiO2 catalysts were prepared by co-precipitation and tested for hydrogenation of furfural to furfuryl alcohol in a fixed bed reactor. The deactivation mechanism of the catalysts was investigated by characterization of H2-TPR, ICP-OES, XPS, TG, Raman and TEM. Under the conditions of atmospheric pressure, reaction temperature of 140 °C, mass space velocity of 2.4 h–1 and the molar ratio of hydrogen to furfural of 9.7, the furfural conversion was higher than 97% in the first 5 h. However, the conversion of furfural decreased rapidly from 96% to 32% after 21 h of reaction, indicating that Cu/SiO2 catalyst was rapidly deactivated. The factors for the deactivation of Cu/SiO2 catalyst were the agglomeration and sintering of the active component copper. Moreover, the carbon deposition on the catalyst surface resulted in the covered active site Cu0.
期刊介绍：
Journal of Fuel Chemistry and Technology (Ranliao Huaxue Xuebao) is a Chinese Academy of Sciences(CAS) journal started in 1956, sponsored by the Chinese Chemical Society and the Institute of Coal Chemistry, Chinese Academy of Sciences(CAS). The journal is published bimonthly by Science Press in China and widely distributed in about 20 countries. Journal of Fuel Chemistry and Technology publishes reports of both basic and applied research in the chemistry and chemical engineering of many energy sources, including that involved in the nature, processing and utilization of coal, petroleum, oil shale, natural gas, biomass and synfuels, as well as related subjects of increasing interest such as C1 chemistry, pollutions control and new catalytic materials. Types of publications include original research articles, short communications, research notes and reviews. Both domestic and international contributors are welcome. Manuscripts written in Chinese or English will be accepted. Additional English titles, abstracts and key words should be included in Chinese manuscripts. All manuscripts are subject to critical review by the editorial committee, which is composed of about 10 foreign and 50 Chinese experts in fuel science. Journal of Fuel Chemistry and Technology has been a source of primary research work in fuel chemistry as a Chinese core scientific periodical.
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