A multifunctional Pd/alumina hollow fibre membrane reactor for propane dehydrogenation
A multifunctional Pd/alumina hollow fibre membrane reactor for propane dehydrogenation
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DOI：
10.1016/j.cattod.2010.04.044
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发表时间：
2010-10
期刊：
影响因子：
5.3
通讯作者：
Ejiro Gbenedio;Zhentao Wu;I. Hatim;B. F. Kingsbury;Kang Li
中科院分区：
文献类型：
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作者：
Ejiro Gbenedio;Zhentao Wu;I. Hatim;B. F. Kingsbury;Kang Li
在成功开发中空纤维膜反应器（HFMR-I）[1]之后，进一步开发了高度紧凑的多功能Pd/氧化铝中空纤维膜反应器（HFMR-II），并将其应用于丙烷催化脱氢制丙烯。开发的HFMR-II由直接涂覆在氧化铝中空纤维基底的外表面上的薄且无缺陷的Pd膜组成，所述氧化铝中空纤维基底具有独特的不对称孔结构，即海绵状外层和指状内层，其中Pt（1 wt.%）/沉积SBA-15催化剂。得益于这种新颖的设计，具有高达1918.4m2/m3的表面积/体积值的官能化氧化铝中空纤维基底具有31.8m2/g的催化剂表面积，这显著高于其中Pt（0.5wt.%）/γ-Al_2O_3催化剂沉积。与传统的固定床反应器（FBR）相比，更大的丙烯选择性和一个数量级更高的时空收率（STY）已实现通过使用HFMR-II丙烷脱氢。虽然HFMR-II中的过程控制步骤被认为是催化反应，但由于焦炭形成导致的催化剂失活，HFMR-II的优点，例如催化剂容易沉积和催化反应的高催化表面积，对于具有较少焦化问题的其它催化反应，例如水煤气变换（WGS）反应和蒸汽重整（SR）等，是有希望的。
Following a successful development of a hollow fibre membrane reactor (HFMR-I) [1], a highly compact multifunctional Pd/alumina hollow fibre membrane reactor (HFMR-II) was further developed and applied to the catalytic dehydrogenation of propane to propene. The developed HFMR-II consists of a thin and defect-free Pd membrane coated directly onto the outer surface of an alumina hollow fibre substrate with a unique asymmetric pore structure, i.e. a sponge-like outer layer and a finger-like inner layer where Pt (1wt.%)/SBA-15 catalyst is deposited. Benefiting from this novel design, the functionalized alumina hollow fibre substrates with a surface area/volume value of up to 1918.4m2/m3possess a catalyst surface area of 31.8m2/g, which is significantly higher than that of the HFMR-I in which Pt (0.5wt.%)/γ-Al2O3catalyst is deposited. In contrast with a conventional fixed bed reactor (FBR), greater propene selectivity and a one order of magnitude higher space-time yield (STY) have been achieved by using the HFMR-II for propane dehydrogenation. Although the process controlling step in the HFMR-II is believed to be the catalytic reaction, as a consequence of catalyst deactivation due to coke-formation, the advantages of HFMR-II, such as easy catalyst deposition and high catalytic surface area for catalytic reactions, are promising for other catalytic reactions with less coking problems, such as the water–gas-shift (WGS) reaction and steam reforming (SR) etc.