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异丁烯选择氧化制备甲基丙烯醛催化剂
Authors
张海朗
张锁江
+3 more
王茜
田伟
闫瑞一
Publication date
1 January 2008
Publisher
Abstract
采用共沉淀法制备了掺杂 Sb 的 Mo-Bi-Fe-Co-Cs-Ce-K-O 混合氧化物催化剂,并将该催化剂用于异丁烯(IB)选择氧化制备甲基丙烯醛(MAL);采用 X 射线衍射和 BET 法对催化剂进行了表征,并在固定床反应器中考察了 Sb 添加量、气态空速、V(IB):V(空气)对催化剂性能的影响。实验结果表明,掺杂 Sb 的 Mo-Bi-Fe-Co-Cs-Ce-K-O 催化剂的成分为CoMoO_4,Bi_2Mo_3O_(12),FeMoO_4,Bi_2Mo_2O_9;Sb 的掺杂改变了 Bi_2Mo_3O_(12)的晶体结构,进而影响催化剂的性能,抑制了产物 MAL 的过度氧化,提高了 MAL 的收率。当 n(Sb):n(Mo)=0.03时,催化剂的性能最好,此时催化剂的组成为 Mo_(12)Bi_(1.6)Fe_1Co_8Ce_(0.4)·Cs_(0.4)K_(0.2)Sb_(0.36),在该催化剂用量5 mL、反应温度380℃、气态空速4 500 h~(-1)、V(IB):V(空气)=6:94的最优反应条件下,IB 的转化率为95.3%,MAL 的选择性和收率分别为71.7%,68.3%
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Institutional Repository of Institute of Process Engineering, CAS (IPE-IR)
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oai:ir.ipe.ac.cn:122111/3125
Last time updated on 09/11/2016
Institutional Repository of Institute of Process Engineering, CAS (IPE-IR)
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:ir.ipe.ac.cn:122111/34322
Last time updated on 05/12/2019