Abstract
Production of Fischer–Tropsch 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–Tropsch synthesis in a gas–solid fixed-bed reactor at 230 °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·gcat–1·h–1, 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.
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