Open AccessHighly stable Ni/ ZnO‐Al 2 O 3 adsorbent promoted by TiO 2 for reactive adsorption desulfurization
Author(s) -
Liu Bowen,
Bai Peng,
Wang Yang,
Dong Zhun,
Wu Pingping,
Mintova Svetlana,
Yan Zifeng
Publication year - 2021
Publication title -
ecomat
Language(s) - English
Resource type - Journals
ISSN - 2567-3173
DOI - 10.1002/eom2.12114
Subject(s) - adsorption , flue gas desulfurization , spinel , sulfur , chemical engineering , hydrothermal circulation , phase (matter) , materials science , hydrothermal synthesis , inorganic chemistry , inert , dibenzothiophene , chemistry , organic chemistry , metallurgy , engineering
The reactive adsorption desulfurization is an important and efficient technology for the ultra‐deep desulfurization of gasoline. The performance of an adsorbent is vital for the efficiency of the reactive adsorption desulfurization process. The formation of inert spinels is commonly recognized for the deactivation of adsorbents. In this work, TiO 2 was incorporated in the Ni/ZnO‐Al 2 O 3 adsorbent to inhibit the formation of the spinel phase. The TiO 2 formed a stable protection layer on the surface of Al 2 O 3 , which prevented the interaction between Al 2 O 3 and ZnO, inhibiting the formation of the ZnAl 2 O 4 spinel phase. The introduction of TiO 2 significantly improved the stability of the adsorbents during cyclic hydrothermal treatments, while the sulfur capacity slightly dropped. Characterization results revealed that TiO 2 was homogeneously dispersed on the surface of Al 2 O 3 support and the incorporation of TiO 2 could maintain a certain amount of Lewis acid sites in the adsorbents, which are favorable for the adsorption of organo‐sulfur compounds.