Measurements and distinguishment of mass transfer processes influid catalytic cracking catalyst particles by uptake and frequencyresponse methods
Measurements and distinguishment of mass transfer processes influid catalytic cracking catalyst particles by uptake and frequencyresponse methods
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吸收法和频率响应法测量和区分催化裂化催化剂颗粒内的传质过程
DOI：
10.1016/j.cattod.2014.06.007
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发表时间：
2015
期刊：
影响因子：
5.3
通讯作者：
Song Lijuan
中科院分区：
文献类型：
--
作者：
Qin Yucai;Gao Xionghou;Zhang Suhong;Zheng Lange;Li Qiang;Mo Zhousheng;Duan Linhai;Zhang Xiaotong;Song Lijuan
本研究采用智能重量分析仪（伊加）的吸收法和频率响应（FR）技术测量和区分了REUSY沸石和流化催化裂化（FCC）催化剂颗粒中的传质过程。结果表明，FCC催化剂颗粒中的扩散时间常数小于REUSY分子筛中的扩散时间常数，FCC催化剂颗粒中的传质过程的限制步骤是在大孔尺度上的扩散过程或/和分子筛-基体界面上的传质过程，而不是在微孔中的晶内扩散过程.
The mass transfer processes in REUSY zeolites and fluid catalytic cracking (FCC) catalyst particles have been measured and distinguished in this study by uptake method with an intelligent gravimetric analyser (IGA) and by the frequency response (FR) technique. The results indicate that the diffusion time constants in the FCC catalyst particles are smaller than those in the REUSY zeolites, and the limiting steps for the overall mass transfer processes in the FCC catalyst particles are the diffusion process in the length scale of macropore of the matrix or/and the mass transfer at the zeolite–matrix interface rather than the intracrystalline diffusion one in the micropores of the zeolite crystals.