学术
摘 要:
采用甲醇合成催化剂JC207和固体酸脱水剂（HZSM-5分子筛或γ-Al2O3）混合制得合成二甲醚双功能催化剂，并在固定床反应装置中进行了活性评价，考察了固体酸脱水剂的酸性对一步法合成二甲醚的影响．结果表明，脱水在B酸、L酸中心都可以进行，并且可能存在协同作用．在实验范围内，L酸／B酸酸值比为3．270脱水效果最好．固体酸脱水剂的脱水效果还与总酸值有关，在实验范围内，总酸值等于0．521时，脱水效果最好．[著者文摘]
文章出处:
《过程工程学报》-2007年7卷5期 -905-909页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1009-606X（2007）05-0905-05
Effect of Solid Acid as Dehydrant on One-step DME Synthesis
XU Qing-li, LI Ting-chen, ZHANG Su-ping, REN Zheng-wei, YAN Yong-jie （Research Center for Biomass Energy, East China University of Science and Technology, Shanghai 200237, China）
Abstract:
Hybrid catalysts composed of JC207 methanol synthesized catalyst and dehydrant （HZSM-5 zeolite or γ-Al2O3） were prepared for the synthesis of dimethyl ether （DME）. Evaluation of catalytic activity on them was conducted in a fixed-bed reactor in order to investigate the effect of solid acid as dehydrant on one-step DME synthesis. The results show that dehydration occurs at B acid site or L acid site, and synergic function exits possibly between the two types of acids. In the experimental scope, when the ratio of L acidity to B acidity is equal to 3.270, the dehydration effect is the best. Besides the total amount of acidity plays a role in the dehydrated step, in the experimental scope, when the total amount of acidity is equal to 0.521, the dehydration effect is the best.[著者文摘]
Key words:
dehydrant; dimethyl ether; acidity
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