Highly Efficient MoS2 Nanocatalysts for Slurry-Phase Hydrogenation of Unconventional Feedstocks into Fuels,Energy & Fuels

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Highly Efficient MoS2 Nanocatalysts for Slurry-Phase Hydrogenation of Unconventional Feedstocks into Fuels
Energy & Fuels ( IF 5.2 ) Pub Date : 2021-01-15 , DOI: 10.1021/acs.energyfuels.0c03996
Anda Zheng _{1,

2} , Donge Wang ₁ , Lin Wang ₁ , Jianqiang Han ₁ , Huaijun Ma ₁ , Zhendong Pan ₁ , Wei Qu ₁ , Congxin Wang ₁ , Zhijian Tian _{1,

3}

Affiliation

Highly active MoS₂ catalysts were developed by tuning the precursors and synthesis solvents to upgrade unconventional feedstocks into light fuels through the slurry-phase hydrogenation reaction. A highly dispersed quasi-single-layer (QSL) MoS₂ nanocatalyst has been synthesized by the solvothermal method with l-cysteine and ethylene glycol as the S precursor and solvent, respectively. The QSL MoS₂ nanocatalyst demonstrates extremely high selectivity to octahydroanthracene of 83.1% and hydrogenation percentage of 54.0% for catalytic anthracene hydrogenation, which are, respectively, 11.4 times and 2.6 times as high as those of bulk MoS₂ catalysts. Moreover, the QSL MoS₂ nanocatalyst exhibits excellent catalytic activities and high catalytic versatility for the slurry-phase hydrogenation of various unconventional feedstocks. The contents of light fractions (gas oil and diesel oil) in the hydrogenation products of coal tar and heavy crude oils from Boscana and Venezuela with the QSL MoS₂ nanocatalyst are as high as 80%, and the conversion of asphaltene hydrogenation can reach much higher than 90%. The excellent catalytic activity of the QSL MoS₂ nanocatalyst may result from its nanostructures including a grain size of 20–30 nm, QSLs of less than 3, and a slab length of 3–7 nm, which benefits to highly expose catalytic active sites and improve its dispersion in the slurry-phase hydrogenation reaction system. This synthesis method can be extended to the design of QSL two-dimensional materials with highly exposed active sites for various catalytic reactions.

中文翻译：

高效MoS ₂纳米催化剂，用于将非常规原料进行淤浆加氢成燃料

通过调节前体和合成溶剂，通过淤浆相加氢反应将非常规原料转化为轻质燃料，开发了高活性的MoS ₂催化剂。通过溶剂热法合成了高度分散的准单层（QSL）MoS ₂纳米催化剂，分别以1-半胱氨酸和乙二醇为S前体和溶剂。QSL MoS ₂纳米催化剂显示出对八氢蒽的选择性极高，催化蒽氢化的选择性为83.1％，氢化百分比为54.0％，分别是本体MoS ₂催化剂的11.4倍和2.6倍。此外，QSL MoS ₂纳米催化剂对于各种非常规原料的淤浆相加氢显示出优异的催化活性和高催化多功能性。QSL MoS ₂纳米催化剂在博斯卡纳和委内瑞拉的煤焦油和重质原油的加氢产物中轻质馏分（瓦斯油和柴油）的含量高达80％，沥青质氢化的转化率可以更高超过90％。QSL MoS ₂的出色催化活性纳米催化剂可能来自其纳米结构，包括粒径20–30 nm，QSL小于3和平板长度3–7 nm，这有利于高度暴露催化活性位并改善其在淤浆相加氢中的分散性反应系统。这种合成方法可以扩展到QSL二维材料的设计，该材料具有用于各种催化反应的高度暴露的活性位。

更新日期：2021-02-04

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