摘要
采用硫酸铈铵(ACS)对双介孔二氧化硅(BMMS)进行了改性,制备了Ce/BMMS吸附脱硫剂,对吸附剂进行了XRD、N2吸附-脱附、FTIR、^29Si-NMR和TEM表征,以模拟柴油中的二苯并噻吩为研究对象在固定床微型反应器上评价了Ce/BMMS的吸附脱硫性能。结果表明,该吸附剂具有明显的双介孔结构,小介孔集中分布于2.63 nm,大介孔集中分布于4.12 nm,ACS在BMMS上均匀分散。Ce/BMMS(10%)的吸附性能优于BMMS、Hβ、SBA-15、Ce/BMMS(5%)和Ce/BMMS(15%),其饱和硫容量可以达到7.99 mg/g,双介孔的存在和表面酸位的存在提高了吸附性能。
Ce/BMMS adsorbent was prepared by modifying bimodal mesoporous silica(BMMS) with ammonium ceric sulfate(ACS). The adsorbent was characterized with XRD, N2 adsorption-desorption, FT-IR,^29Si-NMR and TEM. The adsorption desulfurization performance of Ce/BMMS was evaluated on a fixed-bed micro-reactor with the dibenzothiophene in simulated diesel oil as the research object. The results showed that the adsorbent has the obvious bimodal mesoporous structure. The small mesopores are concentrated at 2.63 nm and the large mesopores are concentrated at 4.12 nm. ACS dispersed uniformly on BMMS. The adsorption performance of Ce/BMMS(10%) is better than anyone of BMMS, Hβ, SBA-15, Ce/BMMS(5%) and Ce/BMMS(15%). The saturated sulfur capacity of Ce/BMMS(10%) can reach 7.99 mg/g. The existence of the bimodal mesopores and the acidic sites enhance the adsorption performance.
作者
韩林凯
高玲玉
杨丽娜
李剑
Han Linkai;Gao Lingyu;Yang Lina;Li jian(Liaoning Shihua University,Fushun 113001,Liaoning,China)
出处
《精细石油化工》
CAS
北大核心
2019年第5期46-50,共5页
Speciality Petrochemicals
基金
辽宁省高等学校优秀人才支持计划资助项目(LJQ2015062)
辽宁省科学技术厅资助项目(20170540585)
辽宁省教育厅项目(L2015296,L2016018)
大学生创新创业训练项目(201710148000019)
关键词
二苯并噻吩
脱硫
吸附剂
双介孔二氧化硅
硫酸铈铵
dibenzothiophene
desulfurization
adsorbent
bimodal mesoporous silica
ammonium ceric sulfate
