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张润通,研讨会,2014年3月5日上午9点


发布日期: 2017/2/7 14:47:47

报告题目:

Measurement of Effective Diffusivity: Chromatographic Method (Pellets & Monoliths)


研究领域及研究概况:

Experimental measurements were performed to determine the effective diffusivity of a binary pair of non-reacting gases (He in N2, and N2 in He) in spherical γ-alumina pellets (1 mm diameter), and in γ-alumina washcoated monoliths (washcoat thickness 20 to 60 µm, on 400 cpsi (cells per square inch) cordierite support). The method used is based on the chromatographic technique, where a gas flows through a tube, which is packed with the sample to be tested. A pulse of tracer gas is injected (e.g. using sample loops: 0.1, 0.25, 0.5 ml) and by using an on-line mass spectrometer the response in the outlet of the packed bed is monitored over time. The obtained tortuosity factor are used in a SPSC model built in CFD package – COMSOL multi-physics 4.3a to back calculate effective diffusivity. Beside, numerical method i.e. convolution theorem is applied to evaluate effective diffusivity from the response of a column without extra-column effects.

个人简历:

巴斯大学,化学工程博士, 2009-2013

论文题目:Measurement of Effective diffusivity: Chromatographic method (Pellets and Monoliths)

导师:Stan T Kolaczkowski教授



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