{"title":"La2O3修饰Cu-ZrO2/γ-Al2O3杂化催化剂对合成气直接合成二甲醚的催化性能增强","authors":"Zhuo Li , Jianqing Li , Cheng Yang , Jinhu Wu","doi":"10.1016/S1003-9953(11)60377-0","DOIUrl":null,"url":null,"abstract":"<div><p>A series of hybrid catalysts were made by physically mixing Cu-ZrO<sub>2</sub> and γ-Al<sub>2</sub>O<sub>3</sub>, for former it was modified with different loadings of La<sub>2</sub>O<sub>3</sub> prepared by co-precipitation method. The catalysts were characterized by BET, XRD, N<sub>2</sub>O-adsorption, EXAFS, H<sub>2</sub>-TPR, NH<sub>3</sub>-TPD techniques and evaluated in the synthesis of dimethyl ether from syngas. The results show that La<sub>2</sub>O<sub>3</sub> promoted catalysts displayed a significantly better catalytic performance compared with Cu-ZrO<sub>2</sub>/γ-Al<sub>2</sub>O<sub>3</sub> catalyst in CO conversion and DME selectivity, and the optimum catalytic activity was obtained when the content of La<sub>2</sub>O<sub>3</sub> was 12 wt%. The characterizations reveal that high copper dispersion, facile reducibility of copper particles and appropriate amount of acidic sites are responsible for the superior catalytic performance.</p></div>","PeriodicalId":56116,"journal":{"name":"Journal of Natural Gas Chemistry","volume":"21 3","pages":"Pages 360-365"},"PeriodicalIF":0.0000,"publicationDate":"2012-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1003-9953(11)60377-0","citationCount":"13","resultStr":"{\"title\":\"Enhanced catalytic performance for direct synthesis of dimethyl ether from syngas over a La2O3 modified Cu-ZrO2/γ-Al2O3 hybrid catalyst\",\"authors\":\"Zhuo Li , Jianqing Li , Cheng Yang , Jinhu Wu\",\"doi\":\"10.1016/S1003-9953(11)60377-0\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>A series of hybrid catalysts were made by physically mixing Cu-ZrO<sub>2</sub> and γ-Al<sub>2</sub>O<sub>3</sub>, for former it was modified with different loadings of La<sub>2</sub>O<sub>3</sub> prepared by co-precipitation method. The catalysts were characterized by BET, XRD, N<sub>2</sub>O-adsorption, EXAFS, H<sub>2</sub>-TPR, NH<sub>3</sub>-TPD techniques and evaluated in the synthesis of dimethyl ether from syngas. The results show that La<sub>2</sub>O<sub>3</sub> promoted catalysts displayed a significantly better catalytic performance compared with Cu-ZrO<sub>2</sub>/γ-Al<sub>2</sub>O<sub>3</sub> catalyst in CO conversion and DME selectivity, and the optimum catalytic activity was obtained when the content of La<sub>2</sub>O<sub>3</sub> was 12 wt%. The characterizations reveal that high copper dispersion, facile reducibility of copper particles and appropriate amount of acidic sites are responsible for the superior catalytic performance.</p></div>\",\"PeriodicalId\":56116,\"journal\":{\"name\":\"Journal of Natural Gas Chemistry\",\"volume\":\"21 3\",\"pages\":\"Pages 360-365\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2012-05-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/S1003-9953(11)60377-0\",\"citationCount\":\"13\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Natural Gas Chemistry\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1003995311603770\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Natural Gas Chemistry","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1003995311603770","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Enhanced catalytic performance for direct synthesis of dimethyl ether from syngas over a La2O3 modified Cu-ZrO2/γ-Al2O3 hybrid catalyst
A series of hybrid catalysts were made by physically mixing Cu-ZrO2 and γ-Al2O3, for former it was modified with different loadings of La2O3 prepared by co-precipitation method. The catalysts were characterized by BET, XRD, N2O-adsorption, EXAFS, H2-TPR, NH3-TPD techniques and evaluated in the synthesis of dimethyl ether from syngas. The results show that La2O3 promoted catalysts displayed a significantly better catalytic performance compared with Cu-ZrO2/γ-Al2O3 catalyst in CO conversion and DME selectivity, and the optimum catalytic activity was obtained when the content of La2O3 was 12 wt%. The characterizations reveal that high copper dispersion, facile reducibility of copper particles and appropriate amount of acidic sites are responsible for the superior catalytic performance.