摘要
采用浸渍法制备了0.03gCeO_2/g(γ-Al_2O_3)脱硫剂,X-射线衍射(XRD)表明CeO_2在γ-Al_2O_3载体表面的分布状态是亚单层分布。采用热重分析方法研究了0.03gCeO_2-g(γ- Al_2O_3)脱硫反应的本征动力学,随着SO_2浓度和温度的增加,CeO_2转化率也会增加,得到动力学方程为R=1.14×10^(-4)·exp(-1508.39/T)·C_(SO_2)mg/mgs。动力学参数活化能是12540.78 J/mol,对SO_2的反应级数是1级,指前因子是1.14×10^(-4)mg(mg·s)^(-1)。0.03gCeO_2/g(γ- Al_2O_3)脱硫剂是可再生的,硫化时间过长会降低脱硫剂的可再生性。
In this paper 0.03gCeO2/g（γ-Al2O3） adsorbent was prepared by impregnation and characterized by X- ray diffraction which showed that the dispersion of CuO supported on γ-Al2O3 was submonolayer. Thermogravimetric technique was used to study the intrinsic sulfation kinetics of CeOE/g-Al2O3 sorbent. With increasing SO2 concentration and temperature, conversion would increase. Intrinsic kinetics equation was R = 1. 1394E （ - 4 ） oexp （ - 1508.39/T） mg/mg · s. Activation of CeO2 supported on γ-Al2O3 lowered much compared with that of pure CeO2. Activation energy, reaction order with respect to SO2, and pre - exponential were 12540. 78J/mol, first order, and 1. 1394Exp （ - 4） mg （mgos） - 1 respectively. 0. 03 gCeO2/g （ γ-Al2O3 ） desulfurizer could be regenerated, but long time would reduce its regeneration performance.
出处
《洁净煤技术》
CAS
北大核心
2007年第3期74-77,共4页
Clean Coal Technology
基金
国家自然科学基金课题(90210003)
北京市自然科学基金课题(2012010)
