Adsorption Equilibrium and Kinetics of Methanol Vapor on Zeolites NaX, KA, and CaA and Activated Alumina
Adsorption Equilibrium and Kinetics of Methanol Vapor on Zeolites NaX, KA, and CaA and Activated Alumina
复制标题
甲醇蒸气在 NaX、KA、CaA 沸石和活性氧化铝上的吸附平衡和动力学
DOI：
10.1021/acs.iecr.8b04076
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发表时间：
2018-10
影响因子：
4.2
通讯作者：
Yuan Mingpu
中科院分区：
文献类型：
--
作者：
Xiao Yonghou;He Gaohong;Yuan Mingpu
甲醇蒸气作为工业流中存在的污染物导致催化剂失活。因此，需要采用吸附技术进行深度去除。甲醇蒸气的等温线和有效扩散系数对于设计纯化过程至关重要。分别使用智能重量分析仪测试了甲醇蒸汽在商用NaX、KA、CaA沸石和活性氧化铝上的平衡吸附。平衡实验在303.2 K和高达19.6 kPa的压力下进行，所得结果与Dubinin-Astakhov (D-A)模型进行拟合。此外，还研究了甲醇蒸气在吸附剂中的扩散情况，并通过拟合Fick扩散模型得到了有效扩散系数。根据对甲醇蒸汽的吸附能力对吸附剂进行比较，沸石从大到小的顺序为NaX>CaA>KA>Al2O3。甲醇蒸汽对NaX、KA、CaA的吸附平衡实验结果...
Methanol vapor as a contaminant presented in industrial streams leads to catalysts deactivation. Therefore, it needs deep removal with adsorption technique. The isotherms and effective diffusion coefficients of methanol vapor are essential to design the purification process. The equilibrium sorption of methanol steam on commercial zeolites NaX, KA, and CaA and activated alumina were tested using an intelligent gravimetric analyzer, respectively. The equilibrium experiments were carried out at 303.2 K and pressures of up to 19.6 kPa, and the results obtained were fitted with the Dubinin–Astakhov (D-A) model. Moreover, the diffusion of methanol vapor in the adsorbents was investigated, and the effective diffusion coefficients were obtained with fitting the Fick diffusion model. The adsorbents are compared on the basis of adsorption capacities for methanol steam, and the descending order of zeolites is NaX > CaA > KA > Al2O3. The sorption equilibrium experimental results of methanol steam on NaX, KA, and CaA...
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