A novel inorganic hollow fiber membrane reactor for catalytic dehydrogenation of propane
A novel inorganic hollow fiber membrane reactor for catalytic dehydrogenation of propane
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DOI：
10.1002/aic.11864
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发表时间：
2009-09
期刊：
影响因子：
3.7
通讯作者：
Zhentao Wu;I. Hatim;B. F. Kingsbury;Ejiro Gbenedio;Kang Li
中科院分区：
文献类型：
--
作者：
Zhentao Wu;I. Hatim;B. F. Kingsbury;Ejiro Gbenedio;Kang Li
开发了一种新型无机中空纤维膜反应器(IHFMR)，并将其应用于丙烷催化脱氢制丙烯。通过相转化/烧结法制备的氧化铝中空纤维基板具有独特的不对称结构，其特征是内表面非常多孔，指状空洞从内表面延伸到∼纤维横截面的80%，其余20%由更致密的海绵状外层组成。与其他现有的Pd/Ag复合膜不同的是，Pd/Ag复合膜的制备是通过在非对称衬底的外表面直接涂覆Pd/Ag层来实现的，而γ-Al_2O_3中间层通常被用来连接Pd/Ag层和衬底。将亚微米级的铂(0.5wt%)/γ-Al_2O_3催化剂沉积在衬底的指状空隙中，制得了高度致密的多功能磁流变催化剂。在723K的反应初期，丙烷转化率高达42%，并且其时空产率是固定床反应器的60倍，显示了其用于脱氢反应的优势。©2009美国化学工程师学会杂志，2009
A novel inorganic hollow fiber membrane reactor (iHFMR) has been developed and applied to the catalytic dehydrogenation of propane to propene. Alumina hollow fiber substrates, prepared by a phase inversion/sintering method, possess a unique asymmetric structure that can be characterized by a very porous inner surface from which finger-like voids extend across ∼80% of the fiber cross-section with the remaining 20% consisting of a denser sponge-like outer layer. In contrast to other existing Pd/Ag composite membranes, where an intermediate γ-Al2O3 layer is often used to bridge the Pd/Ag layer and the substrate, the Pd/Ag composite membrane prepared in this study was achieved by coating the Pd/Ag layer directly onto the outer surface of the asymmetric substrate. After depositing submicron-sized Pt (0.5 wt %)/γ-alumina catalysts in the finger-like voids of the substrates, a highly compact multifunctional iHFMR was developed. Propane conversion as high as 42% was achieved at the initial stage of the reaction at 723 K. In addition, the space-time yields of the iHFMR were ∼60 times higher than that of a fixed bed reactor, demonstrating advantages of using iHFMR for dehydrogenation reactions. © 2009 American Institute of Chemical Engineers AIChE J, 2009