Date of Award
Master of Chemical Engineering (MChE)
Chemical and Petroleum Engineering
Dr. Abdulrahman Alraeesi
Dr. Muhammad Zafar Iqbal
A membrane reactor is a promising device to produce pure hydrogen and enrich CO2 from syngas. A simulation study of a double tubular catalytic membrane reactor for the water-gas shift reaction (WGS) under steady-state operation is presented in this work. The membrane consists of a dense Pd layer (selective to H2) deposited on a porous glass cylinder support. The reaction side was filled with a commercial iron-chromium oxide catalyst, designed as Girdler G-3. The mass of the catalyst was 12.1 g and the height of the catalyst bed was 8 cm. The WGS model was carried out with and without the membrane at a temperature of 673 K, pressure of 2 atm, argon flow rate of 400 cm min-1, and steam-to-carbon (S/C) ratio of 1. The membrane reactor could achieve a CO conversion efficiency of up to 93.7 %, whereas a maximum value of only 77.5 % was attained without using a membrane under the same operating conditions. The WGS membrane was tested under different operation conditions. In order to find the optimum operation conditions, the response surface method was used at a temperature of 673 K and sweep gas (argon) flow rate of 3200 cm3/min in the Minitab software package. It was found that a nearly complete CO conversion could be achieved under the following condition: S/C ratio = 4, total retentate pressure = 12 atm, and membrane thickness = 5 μm. Under these conditions, the S/C ratio obtained satisfactory and a nearly complete conversion of CO was achieved. The developed model results were verified with available experimental results in the literature. It was found that the model results are in good agreement with the experimental results.
Mourad, Aya Abdel-Hamid smail, "Modelling and Simulation of Hydrogen Production via Membrane Reactor" (2017). Chemical and Petroleum Engineering Theses. 6.