Hou Zhengjian, Wei Ling, Feng Xinyuan, Qin Neng, Wei Huijie, Xi Yanyan, Lin Xufeng, Wang Chuangye
State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, P. R. China.
College of Science, China University of Petroleum (East China), Qingdao 266580, P. R. China.
ACS Omega. 2020 Mar 16;5(12):6309-6320. doi: 10.1021/acsomega.9b03647. eCollection 2020 Mar 31.
This work seeks for a better understanding on how the gas treatment process affected the structure of metal loaded zeolite Y (MY, M = Ag, Cu) adsorbants and how the structural changes affected the performances of the adsorbents for adsorptive desulfurization. A series of characterization tools including solid-state nuclear magnetic resonance were employed. Compared to the N treatment, the H treatment on the MY adsorbents led to the reduction of the loaded M components to their metallic state and, consequently, brought several structural changes to the zeolitic framework. The structural changes brought by the H treatment can be accounted for the decreased Brönsted acidity over the Lewis acidity of the adsorbents and thus helped in improving their adsorption capacity. This paper provides new insights on how the zeolitic framework changes affected the sulfur adsorption capacity of MY, which is helpful for designing better adsorbents for sulfur removal from oil.
这项工作旨在更好地理解气体处理过程如何影响负载金属的Y型沸石（MY，M = Ag、Cu）吸附剂的结构，以及结构变化如何影响吸附剂的吸附脱硫性能。采用了包括固态核磁共振在内的一系列表征工具。与N处理相比，对MY吸附剂进行H处理导致负载的M组分还原为金属态，从而给沸石骨架带来了一些结构变化。H处理带来的结构变化可以解释为吸附剂的布朗斯台德酸度相对于路易斯酸度降低，从而有助于提高其吸附能力。本文为沸石骨架变化如何影响MY的硫吸附容量提供了新的见解，这有助于设计更好的从油中脱硫的吸附剂。
