Low-Pressure Hydrogenation of CO2 to CH3OH Using Ni-In-Al/SiO2 Catalyst Synthesized via a Phyllosilicate Precursor
Low-Pressure Hydrogenation of CO2 to CH3OH Using Ni-In-Al/SiO2 Catalyst Synthesized via a Phyllosilicate Precursor
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DOI：
10.1021/acscatal.7b00848
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发表时间：
2017-08
期刊：
影响因子：
12.9
通讯作者：
A. Richard;M. Fan
中科院分区：
文献类型：
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作者：
A. Richard;M. Fan
这项研究的总体目标是将日益受到关注的二氧化碳和可再生氢气转化为需求量很大的甲醇（CH3OH），从而为预防气候变化和可持续经济发展创造双赢的局面。这种定向二氧化碳利用技术成功的关键是通过层状硅酸盐前驱体开发低压甲醇合成催化剂（NiaInbAl/SiO2；a = 0–8.3，b = 0–9.1），从而形成平均直径为2.5–3.5 nm的分散良好的金属颗粒。采用ICP-OES、N2 物理吸附、XRD、SEM、TEM、TGA、H2 TPR、DRIFTS 和 XPS 等多种方法对催化剂进行了表征。在环境压力下不同评价温度下比较了NiaInbAl/SiO2催化剂和常规催化剂的性能。结果发现，Ni/In比为0.4-0.7的催化剂表现出最高的活性。金属负载量为 15% 的 Ni3.5In5.3Al/SiO2 (NIA-0.7) 是测试的 NiaInbAl 中最好的...
The overall objective of this research is to convert the increasingly concerning CO2 and renewable H2 to highly demanded methanol (CH3OH), which creates a win–win scenario for simultaneous climate change prevention and sustainable economic development. The key to the success of this targeted CO2 utilization technology is the development of low-pressure methanol synthesis catalysts (NiaInbAl/SiO2; a = 0–8.3, b = 0–9.1) by means of a phyllosilicate precursor, allowing for formation of well-dispersed metallic particles with an average diameter of 2.5–3.5 nm. The catalysts were characterized with various methods including ICP-OES, N2 physisorption, XRD, SEM, TEM, TGA, H2 TPR, DRIFTS, and XPS. The performances of the NiaInbAl/SiO2 catalysts and conventional catalyst were compared under various evaluation temperatures at ambient pressure. It was found that catalysts with Ni/In ratios of 0.4–0.7 showed the highest activity. Ni3.5In5.3Al/SiO2 (NIA-0.7) with 15% metal loading was the best among the tested NiaInbAl...