Iron Aerogel and Xerogel Catalysts for Fischer−Tropsch Synthesis of Diesel Fuel
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- 作者：Sumit Bali ; Frank E. Huggins ; Gerald P. Huffman ; Richard D. Ernst ; Ronald J. Pugmire ; Edward M. Eyring
- 刊名：Energy & Fuels
- 出版年：2009
- 出版时间：January 22, 2009
- 年：2009
- 卷：23
- 期：1
- 页码：14-18
- 全文大小：164K
- 年卷期：v.23,no.1(January 22, 2009)
- ISSN：1520-5029
文摘
Iron aerogels, potassium-doped iron aerogels, and potassium-doped iron xerogels have been synthesized and characterized and their catalytic activity in the Fischer−Tropsch (F-T) reaction has been studied. Iron aerogels and xerogels were synthesized by polycondensation of an ethanolic solution of iron(III) chloride hexahydrate with propylene oxide which acts as a proton scavenger for the initiation of hydrolysis and polycondensation. Potassium was incorporated in the iron aerogel and iron xerogel by adding aqueous K2CO3 to the ethanolic solutions of the Fe(III) precursor prior to addition of propylene oxide. Fischer−Tropsch activities of the catalysts were tested in a fixed bed reactor at a pressure of 100 psi with a H2:CO ratio of 2:1. Iron aerogels were found to be active for F-T synthesis, and their F-T activities increased on addition of a K containing promoter. Mssbauer spectroscopic data are consistent with an open, nonrigid iron(III) aerogel structure progressing to an iron carbide/metallic iron catalyst via agglomeration as the F-T synthesis proceeds in the course of a 35 h fixed bed reaction test.