摘要
采用等体积浸渍法制备了CuHY分子筛吸附剂,运用XRD表征了吸附剂的晶体结构,Py-FT-IR技术表征了吸附剂的表面酸性能,利用固定床穿透曲线技术、WK-2D微库仑仪评价了改性分子筛的吸附脱硫性能。结果表明,当铜负载量为4%时,其吸附脱硫能力较佳,随着分子筛吸附剂的表面B酸量和表面L酸量比值的减小,其吸附脱硫性能越强。而当铜负载量较大时,因其表面出现氧化铜,而使其表面基本不存在B酸,吸附脱硫能力大大减弱。
The CuHY zeolites adsorbents with different Cu loadings were prepared via impregnation method.The crystal structure of the adsorbent was characterized by XRD,and the surface acidity was measured by Py-FT-IR technique.The adsorption desulfurization performance was evaluated using fixed bed method with a WK-2D micro coulometer analyzer.The results show that the adsorbents have the best adsorption desulfurization ability when the copper loading is 4%.The adsorption desulfurization performance becomes better with the decrease of the ratio of B acid amount and L acid amount.However,the adsorption desulfurization ability reduces severely,when copper loading is too large which results the surface copper oxide species,even though there is no B acidic sites existing on the surface of the adsorbent.
出处
《石油化工高等学校学报》
CAS
2014年第3期11-15,共5页
Journal of Petrochemical Universities
基金
国家自然科学基金项目(21076100)
辽宁省高校创新团队项目(2007T110)
辽宁省高端人才队伍建设项目资助
关键词
Y型分子筛
吸附脱硫
等体积浸渍
表面酸性
Y zeolite
Adsorption desulfurization
Impregnation method
Surface acidity
