Comparative Studies of Silica-Encapsulated Iron, Cobalt, and Ruthenium Nanocatalysts for Fischer-Tropsch Synthesis in Silicon-Microchannel Microreactors

被引：22
作者：
Mehta, Shirish [1 ]
Deshmane, Vishwanath [2 ,3 ]
Zhao, Shihuai [1 ,5 ]
Kuila, Debasish [1 ,2 ,4 ]
机构：
[1] Louisiana Tech Univ, Inst Micromfg, Ruston, LA 71272 USA
[2] N Carolina Agr & Tech State Univ, Dept Chem, Greensboro, NC 27411 USA
[3] N Carolina Agr & Tech State Univ, Dept Chem Biol & Bioengn, Greensboro, NC 27411 USA
[4] Louisiana Tech Univ, Chem Program, Ruston, LA 71272 USA
[5] Tianjin Polytech Univ, Sch Environm & Chem Engn, Tianjin 300387, Peoples R China
来源：
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2014年 / 53卷 / 42期
基金：
美国国家科学基金会;
关键词：
SYNGAS CONVERSION; HIGHER ALKANES; CATALYSTS; REACTOR; CO; DEACTIVATION; PERSPECTIVE; SELECTIVITY; CHEMISTRY; HYDROGEN;
D O I：
10.1021/ie502193e
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
FischerTropsch (FT) synthesis in Si-microchannel microreactors, containing 116 channels (50 mu m x 100 mu m x 1.3 cm), was carried out using SiO2-encapsulated Fe, Co, and Ru catalysts. The microchannels were uniformly coated with catalyst via a modified closed channel infiltration (mCCI) procedure. The mCCI method helps to load the catalyst without blockage of channels with no issues related to anodic bonding. The catalysts were characterized by scanning electron microscopy, optical microscopy, energy-dispersive X-ray spectroscopy, and BrunaerEmmettTeller analysis. The metal type, temperature, and H-2/CO mole ratio showed a significant effect on FT synthesis. The highest FT reactivity of 0.1746 mol of CO g(1) h(1) was observed for Ru/SiO2, and the highest CO conversion of 90% was obtained with Co/SiO2 at 250 degrees C. The highest selectivity to propane (44%) and butane (8%) was observed for Co/SiO2 and Ru/SiO2, respectively, at 250 degrees C and 3:1 H-2/CO. The deactivation rates of the catalysts in the microreactor for FT synthesis followed the order Ru/SiO2 > Fe/SiO2 > Co/SiO2.
引用
收藏
页码：16245 / 16253
页数：9
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