Tuning hydrodearomatization performance of interstitial NixW alloy catalyst by controlling the doping of a small amount of tungsten
Tuning hydrodearomatization performance of interstitial NixW alloy catalyst by controlling the doping of a small amount of tungsten
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通过控制少量钨的掺杂调节间隙型NixW合金催化剂的加氢脱芳性能
DOI：
10.1016/j.cattod.2020.04.011
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发表时间：
2020-05
期刊：
影响因子：
5.3
通讯作者：
Wei Li
中科院分区：
文献类型：
--
作者：
Qingxin Guan;Guoxia Yun;Wei Li
加氢是去除多环芳烃（PAHs）的有效方法。不幸的是，传统的加氢催化剂在低反应温度下对于加氢脱芳构化(HDA)反应的活性不足。在本文中，我们提出了一种通过控制钨的掺杂来调节间隙 NixW 合金催化剂的 HDA 性能的策略。表征结果表明，在600℃氢气中还原双金属氧化物可以合成间隙型NixW合金催化剂。作为对比，氧化钨在不添加镍的情况下只能还原为WO2。结果发现，在 600°C 下获得的间隙 NixW-600 合金催化剂比在 350°C 下获得的催化剂表现出更好的 HDA 活性。有趣的是，NixW-600 催化剂在低反应温度下具有优异的 HDA 活性。特别是，Ni7W/MCM-600催化剂在140℃和WHSV=4h−1时表现出优异的萘烷选择性（100%），但Ni/MCM和Pt/MCM催化剂在此条件下没有萘转化率。最后，我们发现NixW/MCM催化剂的HDA活性与催化剂的组成、Ni/W摩尔比和还原温度密切相关。该策略为构建高性能加氢催化剂开辟了一条便捷的途径，并提供了前瞻性的设计指南。
Hydrogenation is an effective way to remove polycyclic aromatic hydrocarbons (PAHs). Unfortunately, traditional hydrogenation catalysts have insufficient activities for hydrodearomatization (HDA) reaction at low reaction temperatures. In this paper, we proposed a strategy to tune the HDA performance of interstitial NixW alloy catalysts by controlling the doping of tungsten. The characterization results show that the interstitial NixW alloy catalyst could be synthesized by reducing the bimetal oxide in hydrogen at 600 °C. As a comparison, tungsten oxide can only be reduced to WO2without the addition of nickel. It was found that the interstitial NixW-600 alloy catalysts obtained at 600 °C showed better HDA activities than those catalysts obtained at 350 °C. Interestingly, the NixW-600 catalysts had excellent HDA activities at low reaction temperature. Especially, Ni7W/MCM-600 catalyst displayed the excellent selectivity of decalin (100%) at 140 °C and WHSV = 4 h−1, but Ni/MCM and Pt/MCM catalysts had no naphthalene conversion under this condition. Finally, we found that HDA activities of the NixW/MCM catalysts are extremely related to the composition of catalysts, the molar ratio of Ni/W, and reduction temperature. This strategy opens a convenient route and provides a prospective design guideline for constructing high-performance hydrogenation catalysts.
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影响因子：
2.8
作者：
K. B. Tayeb;C. Lamonier;C. Lancelot;M. Fournier;Audrey Bonduelle-Skrzypczak;F. Bertoncini
通讯作者：
K. B. Tayeb;C. Lamonier;C. Lancelot;M. Fournier;Audrey Bonduelle-Skrzypczak;F. Bertoncini
DOI：
10.1016/j.apcatb.2018.07.012
发表时间：
2018-12
期刊：
Applied Catalysis B: Environmental
影响因子：
--
作者：
Eleana Kordouli;B. Pawelec;C. Kordulis;A. Lycourghiotis;J. Fierro
通讯作者：
Eleana Kordouli;B. Pawelec;C. Kordulis;A. Lycourghiotis;J. Fierro
影响因子：
8.4
作者：
Shozi, Mzamo L.;Dasireddy, Venkata D. B. C.;Friedrich, Holger B.
通讯作者：
Friedrich, Holger B.
影响因子：
7.3
作者：
M. Astier;M. Lacroix;S. Teichner
通讯作者：
M. Astier;M. Lacroix;S. Teichner
影响因子：
6.7
作者：
Sung-Hoon Hong;S. Ahn;J. Choi;Jin Yeong Kim;Hoy-Jin Kim;Hyoung‐Juhn Kim;J. Jang;Haekyoung Kim;Soo‐Kil Kim
通讯作者：
Sung-Hoon Hong;S. Ahn;J. Choi;Jin Yeong Kim;Hoy-Jin Kim;Hyoung‐Juhn Kim;J. Jang;Haekyoung Kim;Soo‐Kil Kim