Removal of Heteroaromatic Sulfur Compounds by a Non-noble Metal Fe Single-atom Adsorbent  

作　　者：LüYanjun Wen Jie Gong Qinmei Zhang Lianhong Li Airong Arshid Mahmood Ali Zhang Hui 

机构地区：[1]College of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu 610500

出　　处：《China Petroleum Processing & Petrochemical Technology》2022年第2期46-57,共12页中国炼油与石油化工（英文版）

摘　　要：Sulfur-containing compounds(SCCs)must be removed from fuels before use.In this study,a novel non-noble metal Fe single-atom adsorbent(SA-Fe/CN)was synthesized using a core-shell strategy and applied for the adsorptive removal of benzothiophene(BT)and dibenzothiophene(DBT).The adsorption isotherms,thermodynamics,kinetics,and adsorption-regeneration cycles of DBT and BT on SA-Fe/CN were studied.SA-Fe/CN exhibited a significant capacity to adsorb DBT,and the isothermal equilibrium was well described by the Langmuir isotherm.The Gibbs free energy values were negative(ΔG^(0)<0),indicating that the adsorption of DBT and BT was favored and spontaneous.The adsorption process conformed to the pseudo-second-order kinetic model with high R^(2) values(0.9994,0.9987).The adsorption capacity of SA-Fe/CN for DBT and BT reached 163.21 mg/g and 90.35 mg/g,respectively,due to the highly active sites of the single atom and electrostatic interaction with the sulfide.Therefore,SA-Fe/CN may be a promising adsorbent for SCC removal.

关 键 词：single-atom adsorbent adsorptive desulfurization thermodynamics and kinetics heteroaromatic sulfur compounds 

分 类 号：TE624.55[石油与天然气工程—油气加工工程] TQ424[化学工程]