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Reactive Adsorption Desulfurization of Olefin-Containing Feedstocks over Ni/ZnO–Al2O3 Adsorbents: Effects of ZnO–Al2O3 Support Composition
Petroleum Chemistry ( IF 1.4 ) Pub Date : 2022-06-01 , DOI: 10.1134/s0965544122050036
A. A. Botin, A. V. Mozhaev, Yu. A. Khamzin, R. E. Boldushevskii, P. A. Nikulshin

Abstract

Several adsorption-catalytic systems have been synthesized, which are different by the composition and method of the support preparation. The composition and physicochemical characteristics of the synthesized composites were studied using nitrogen porosimetry, inductively coupled plasma atomic emission spectroscopy, X-ray diffraction, and transmission electron microscopy. The desulfurization depth and the hydrodesulfurization selectivity concerning the hydrogenation reaction (HDS/HYD selective factor) were evaluated in the reactive adsorption of model FCC gasoline containing thiophene (2630 ppm) and hexene-1 (20 wt %) on a fixed-bed flow unit. It has been established that a desulfurization depth of >99% at the chemisorption stage is achieved at a temperature of 400°C, a pressure of 0.5 MPa, and a WHSV of 5.2 h–1 on a Ni/ZnO@Al2O3 adsorption-catalytic system synthesized by coprecipitation and subsequent incipient wetness impregnation. For Ni/(ZnO)Al2O3 adsorption-catalytic systems, it was shown that an increase in the Ni particles’ average size leads to an increase in HDS/HYD selectivity at the chemisorption stage.



中文翻译:

Ni/ZnO–Al2O3 吸附剂对含烯烃原料的反应吸附脱硫:ZnO–Al2O3 载体成分的影响

摘要

已经合成了几种吸附催化体系,它们因载体制备的组成和方法而异。使用氮孔隙率测定法、电感耦合等离子体原子发射光谱法、X 射线衍射和透射电子显微镜研究了合成复合材料的组成和物理化学特性。在固定床流动装置对含有噻吩 (2630 ppm) 和 1-己烯 (20 wt%) 的 FCC 模型汽油进行反应吸附时,评估了与加氢反应有关的脱硫深度和加氢脱硫选择性(HDS/HYD 选择因子) . 已经确定,在 400°C 的温度、0.5 MPa 的压力和 5.2 h –1的 WHSV 条件下,化学吸附阶段的脱硫深度 > 99%在通过共沉淀和随后的初湿浸渍合成的 Ni/ZnO@Al 2 O 3吸附催化系统上。对于 Ni/(ZnO)Al 2 O 3吸附催化体系,表明 Ni 颗粒平均尺寸的增加导致化学吸附阶段 HDS/HYD 选择性的增加。

更新日期:2022-06-01
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