Synthesis and Characterization of Co/C and Fe/C Nanocatalysts for Fischer鈥揟ropsch Synthesis: A Comparative Study Using a Fixed-Bed Reactor
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- 作者：James Aluha ; Philip Boahene ; Ajay Dalai ; Yongfeng Hu ; Kossi Bere ; Nadi Braidy ; Nicolas Abatzoglou
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2015
- 出版时间：November 4, 2015
- 年：2015
- 卷：54
- 期：43
- 页码：10661-10674
- 全文大小：1012K
- ISSN：1520-5045
文摘
Production of Fischer鈥揟ropsch catalysts is challenging because it involves controlling and optimizing multiple parameters in numerous technical steps. Here, we present C-supported nanometric Fe and Co catalysts synthesized by plasma spraying, a method that contracts catalyst production into a single step, in contrast to traditional multistep catalyst production by precipitation or impregnation. The catalysts were reduced in situ and then tested for Fischer鈥揟ropsch synthesis in a gas鈥搒olid fixed-bed reactor at 230 掳C and 30-bar pressure for 24 h. The performance of plasma-synthesized catalysts was superior at a gas hourly space velocity of 6,000 mL路gk">catk">鈥?路h鈥?, with Fe/C catalysts showing about 30% CO conversion per pass while Co/C catalysts yielded about 20% CO conversion. Identical C-supported Co and Fe catalysts prepared by impregnation or precipitation gave CO conversions of about 7% under similar reaction conditions.