The preparation of a Cu-based sorbent supported by cost-effective AlOOH is proposed. A Cu-based sorbent for thiophene removal from coke oven gas was synthesized via coprecipitation, and the effect of AlOOH addition on the dispersion of activated Cu species and desulfurization properties was investigated. At an AlOOH content of 25%, smaller and more highly dispersed Cu grains, along with ZnO crystalline phases, were present on the surface of the Cu-based sorbent. The enhanced Cu-ZnO interaction contributed to the superior desulfurization performance (Qb-thiophene = 30.43 mg/g). The incorporation of an appropriate amount of AlOOH into the binary system during synthesis produces a highly active sorbent with superior Cu dispersion and smaller Cu grains, thereby fulfilling the requirements of industrial applications at a lower production cost.
Xiaoxia Zhang,Yongjin Wang,Junjie Liao,Jiancheng Wang,Liping Chang,Weiren Bao
Coke oven gas (COG) is a hydrogen-rich byproduct whose efficient utilization requires deep removal of organic sulfur compounds such as thiophene . While Cu-based sorbents exhibit excellent desulfurization performance, the influence of precursor structural characteristics on their activity remains poorly understood. In this study, the relationship between precursor assembly and desulfurization performance of unpromoted Cu/ZnO/Al 2 O 3 sorbents was systematically elucidated. Three synthesis routes were explored to tailor precursor structures, revealing that aurichalcite-derived precursors enable superior Cu dispersion, stronger Cu-Zn interaction, and enhanced reducibility of active sites. The optimized sorbent prepared via urea hydrolysis achieved an exceptional breakthrough sulfur capacity of 29.91 mg/g—nearly twice that of hydrotalcite-derived counterparts—without the use of additional promoters. Mechanistic analysis further demonstrates that the precursor structure governs the formation of highly reducible Cu species and promotes thiophene activation through improved hydrogenation pathways. These findings provide new insights into the design of high-performance Cu-based sorbents.
危险品化学品经营许可证（带存储）