二甲醚水蒸气重整制氢Cu-Zn-Al-Cr/ZSM-5双功能催化剂研究  

PRODUCTION OF HYDROGEN BY STEAM REFORMING OF DIMETHYL ETHER OVER Cu-Zn-Al-Cr /ZSM-5 BIFUNCTIONAL CATALYST

作　　者：李娟[1,2] 胡蓉蓉[1] 闫常峰[1,2] 郭常青[1] 海航 郑晓晓[1,2] 罗伟民[1] 李文博[1] 

机构地区：[1]中国科学院广州能源研究所,广州510640 [2]中国科学院大学,北京100049

出　　处：《太阳能学报》2014年第1期52-57,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(20806082;21276254)

摘　　要：用共沉淀耦合机械混合法制备Cu-Zn-Al-Cr/ZSM-5双功能催化剂,与Cu-Zn-Al/ZSM-5催化剂进行对比研究,并考察其在二甲醚水蒸气重整制氢反应中的催化性能,研究ZSM-5在二甲醚水解反应以及铜基催化剂Cu-Zn-Al-Cr在甲醇水蒸气重整制氢反应中的活性,同时采用热重、X射线衍射、H2程序升温还原等手段对催化剂的焙烧温度、物相结构、还原性能等进行分析。结果表明,Cu-Zn-Al-Cr/ZSM-5双功能催化剂的性能明显优于Cu-Zn-Al/ZSM-5催化剂,同时Cu-Zn-Al-Cr/ZSM-5双功能催化剂在二甲醚水蒸气重整制氢反应中有较好的低温活性和CO选择性,当反应温度为280℃,水醚比为7∶1时,二甲醚转化完全,氢气收率达到85.7%,反应温度低于240℃时,无CO生成;同时催化剂之间的耦合作用使Cu-Zn-Al-Cr/ZSM-5催化剂在较高温度下具有较好的活性和稳定性。The Cu-Zn-Al-Cr/ZSM-5 performances for hydrogen production during dimethyl ether steam reforming （DME SR） were investigated, which was prepared by using the co-precipitation coupling with mechanical mixing method. Meanwhile, the catalytic activity comparison between Cu-Zn-Al-Cr/ZSM-5 and Cu-Zn-AL/ZSM-5 catalyst, the activity of dimethyl ether hydrolysis over the ZSM-5 catalyst and methanol steam reforming over the Cu-Zn-Al-Cr catalyst were also studied. The calcination temperature, structure, and reduction performance of these catalysts were analyzed by thermogravimetry, X-ray diffraction, and H2 temperature-programmed reduction. The results showed that Cu-Zn-Al-Cr/ZSM-5 catalyst performance was remarkably better than Cu-Zn-Al/ZSM-5 catalyst, and the Cu-Zn-Al-Cr/ZSM-5 catalyst has better low-temperature high activity and CO selectivity. DME can be completely converted and the maximum hydrogen yield of around 85.7% could be obtained when the reaction temperature was controlled at 280℃. Besides, there was no CO formation when the temperature was lower than 240℃. Moreover, there were significantly synergistic effect, which made the Cu-Zn-Al-Cr/ZSM-5 catalyst have high activity and stability at high temperature, between Cu-Zn-A1-Cr catalyst and ZSM-5.

关 键 词：Cu—Zn—Al-Cr ZSM-5催化剂 二甲醚 水蒸气重整 制氢 

分 类 号：TQ032.4[化学工程]