文献类型：期刊文献

中文题名：固体酸催化剂对二甲醚水蒸气重整制氢过程的影响

英文题名：Influence of Solid Acid Catalysts on Steam Reforming of Dimethyl Ether for Hydrogen Production

作者：王晓蕾[1,2];任克威[2,3];潘相敏[2,4];林瑞[2,4];马建新[2,4]

机构：[1]同济大学环境科学与工程学院,上海200092;[2]同济大学新能源汽车工程中心,上海201804;[3]华东理工大学资源与环境工程学院,上海200237;[4]同济大学汽车学院,上海201804

年份：2009

卷号：30

期号：4

起止页码：297

中文期刊名：催化学报

外文期刊名：CHINESE JOURNAL OF CATALYSIS

收录：CSTPCD;;Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000267277100006)】；北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：同济大学-壳牌公司国际合作项目(20071193)

语种：中文

中文关键词：固体酸催化剂;氧化铜;氧化锌;氧化铝;二甲醚水解;二甲醚水蒸气重整;制氢

外文关键词：solid acid catalyst;copper oxide;zinc oxide;alumina;dimethyl ether hydrolysis;dimethyl ether steam reforming;hydrogen production

摘要：将HZSM-5(n(SiO2)/n(Al2O3)=25,38,50和93.5),HM,Hβ,HY和γ-Al2O3等多种固体酸催化剂用于二甲醚(DME)水解,并将其分别同自制的CuO/ZnO/Al2O3催化剂进行机械混合,制备双功能催化剂并用于DME水蒸气重整制氢反应.结合NH3程序升温脱附表征手段,考察了固体酸催化剂酸性位的强度、酸量及种类对DME水解和重整反应的影响;结合热重-差热扫描量热分析表征手段,研究了HZSM-5(93.5)和γ-Al2O3在DME水解过程中的稳定性.在此基础上,进一步研究了固体酸催化剂对DME重整制氢反应中DME转化率、H2摩尔产率以及含碳气体产物选择性的影响.结果表明,固体酸催化剂的酸性位的强度和酸量对DME重整制氢过程具有显著的影响,强酸度和高酸量无益于DME水蒸气重整制氢;以HZSM-5为固体酸的双功能催化剂具有较好的低温活性,而以γ-Al2O3为固体酸的双功能催化剂在高温下具有较高的H2产率.
Dimethyl ether（DME） hydrolysis was carried out over different solid acid catalysts including HZSM-5（n（SiO2）/n（Al2O3） = 25,38,50 and 93.5）,HM,Hβ,HY,and γ-Al2O3.CuO/ZnO/Al2O3 that was prepared by the co-precipitation method and mechanically mixed with these solid acids was used for DME steam reforming（DME SR）.By NH3 temperature-programmed desorption,the influences of acid strength,acid amount,and acid site type on DME hydrolysis and DME SR were studied.The stability of the selected solid acids during DME hydrolysis was investigated by thermal gravity-differential scanning calorimetry.Furthermore,the effects of different solid acids on DME conversion,H2 production rate,and selectivity for carbonaceous products were also discussed.The results showed that the acid strength and acid amount of solid acid played a significant role on DME SR.The solid acid catalysts with high acid strength and large acid amount were not suitable for H2 production.The bi-functional catalyst composed of HZSM-5 and CuO/ZnO/Al2O3 had higher catalytic activity at low temperatures,while the bi-functional catalyst composed of γ-Al2O3 and CuO/ZnO/Al2O3 showed higher H2 production rate at high tempera-tures.