ZrO2-促进了Cu-Co,Cu-Fe和Co-Fe催化剂,用于更高的酒精合成
Yuzhen Ge1, Tangsheng Zou1, Antonio J Martín1
1Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland.
这项研究引入了二氧化 (ZrO2) 作为高酒精 (HA) 合成催化剂的促进剂. 优化的催化剂显著提高了HA的生产力和稳定性,而非合成气.
科学领域:
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 从合成气中直接合成更高的酒精 (HA) 是至关重要的,但具有挑战性.
- 经过修改的费舍尔-托普施合成 (m-FTS) 催化剂通常缺乏足够的活性位点用于工业应用.
研究的目的:
- 研究高度分散的金属氧化物 (Co-Cu,Cu-Fe,Co-Fe) 作为m-FTS催化剂的影响.
- 为了证明二氧化 (ZrO2) 作为HA合成的一般促进剂的有效性.
主要方法:
- 合成和表征基于Co-Cu,Cu-Fe和Co-Fe的m-FTS催化剂,具有不同的ZrO2负载.
- 在相关条件下,评估了从合成气中直接合成更高酒精的催化剂性能.
- 使用先进的表征技术分析了催化剂结构和特性.
主要成果:
- 观察到ZrO2组成和HA生产力之间的火山般的关系,在5-10mol%ZrO2.2%的最佳性能.
- 优化的Cu1Co4@ZrO2-5催化剂与其无ZrO2对应物相比,HA生产率增加了2.5倍.
- Co1Fe4@ZrO2-10催化剂实现了高生产率 (345 mgHA h-1 gcat-1),并表现出超过300小时的稳定性能.
- 加入ZrO2导致无形,有缺陷的结构,增强H2和CO激活和稳定活性相.
结论:
- 二氧化 (ZrO2) 是一种有效的通用促进剂,用于增强使用m-FTS催化剂从合成气中提升酒精合成的效果.
- 优化的ZrO2促进催化剂为工业相关性提供了更好的活性,选择性和长期稳定性.
- 该研究提供了对催化剂设计的见解,以有效地生产更高的酒精.
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