二甲醚蒸气重整催化制氢工艺.pdfVIP

学兔兔 化 工 进 展 2009年第28卷第7期 CHEMICAL INDUSTRY AND ENGINEERING PROGRESS ·1169· 二甲醚蒸气重整催化制氢工艺 张晓芳1，李 平 ，熊刚华 ，周兴贵 ，王晓蕾 ，任克威 ( 华东理工大学化学工程国家重点联合实验室，上海 200237； 同济大学新能源汽车工程中心，上海 201804) 摘 要：考察了HZSM一5型分子筛在不同温度下对二甲醚水解的活性与稳定性，分析了分子筛硅铝比的影响。还 将HZSM一5—50(硅铝比为5O)与自制Cu—Zn—A1(摩尔比为3：5：2)催化剂进行物理混合制成复合催化剂，研究 了两者质量配比对复合催化剂上二甲醚蒸气重整制氢过程中转化率与氢选择性的影响，并考察了不同原料气体空 速下复合催化剂的性能。结果表明，复合催化剂质量比Cu—Zn—A1：HZSM一5—50为1：1、温度为275℃、气体空 速为18000 mL／(gcat．h)的反应条件下性能比较稳定，当空速接近4000 mL／(gcat．h)时，H2收率可获极值，达到 54％左右。 关键词：二甲醚；蒸汽重整；氢；水解；HZSM一5型分子筛；Cu—Zn—A1催化剂 中图分类号：O 643 文献标识码：A 文章编号：1000—6613(2009)07—1169—06 Catalytic steam reforming of dimethyl ether for hydrogen production ZHANG Xiaofang 1 LIPing 1 XIONG Ganghua ，ZHOUXinggui 1，WANGXiaolei 2 RENKewei ( State Key Laboratory of Chemical Engineering，East China University of Science and Technology，Shanghai 200237， China； Clean Energy Automotive Engineering Center，Ton~i University，Shanghai 201804，China) Abstract：The activity and stability of hy~lrolysis of dimethyl ether over HZSM一5 molecular sieve at different temperatures under a space velocity as high as 1 8000 mL／gcat·h were investigated．The effect of Si／AI ratio on the properties of HZSM-5 during hydrolysis was studied．The results showed that HZSM一5 exhibited high activity for the hydrolysis of dimethyl ether but easily lost its activity due to coke formation at low Si／A1 ratios or at high temperatures．For the process of steam reforming of dimethyl ether，a composite catalyst consisting of HZSM一5—50(Si／A1 ratio is 50)and self-synthesized Cu-Zn—A1(mole ratio is 3：5：2)catalyst was prepared simply by mechanical mixing．The dimethyl ether conve