Subsection controlling strategy for improving sorption-enhanced reaction processes

• Type: Article in International Scientific Journal
• Date: 2004

Authors

Guahua Xiu (Author) FEUP; Ping Li (Author) Other; Alírio Rodrigues (Author) FEUP

Journal

Title: Chemical Engineering Research and Design

Vol. 82 No. 2

Pages: 192-202

ISSN: 0263-8762

Publisher: Institute of Chemical Engineers

Indexing

COMPENDEX

Scientific classification

CORDIS: Technological sciences > Engineering > Chemical engineering

Other information

DOI: 10.1205/026387604772992765

Abstract (EN): The subsection-controlling strategy was applied to the design of the adsorptive reactor to improve the sorption-enhanced steam–methane reforming (SMR), by using subsection-packing ratio of adsorbent and catalyst, and subsection-controlling wall temperature. In the case of the subsection-controlling wall temperature, there is a lower operating temperature zone at the outlet of the adsorptive reactor, where the remaining CO and CO2 concentrations in gas stream can be decreased further by the principle of temperature-induced equilibrium shift. The feasibility and effectiveness of the subsection-controlling strategy for improving the sorption-enhanced steam–methane reforming process is analysed by numerical simulation based on literature data. At low operating pressure, in the range 222–445.7 kPa, combined with subsection-controlling strategy [higher temperature, 450–490°C, for subsections I (inlet zone of the adsorptive reactor) and II (middle zone of the adsorptive reactor) and lower temperature, 400–450°C, for subsection III (outlet zone of the adsorptive reactor); lower packing ratio of adsorbent and catalyst for subsections I and III and higher ratio for subsection II] a product gas with hydrogen purity above 85% and traces of CO2 (less than 300 ppm) and CO (less than 30 ppm) can be continuously produced with higher hydrogen productivity by a four-step one-bed (a 6 m long adsorptive reactor) pressure swing sorption-enhanced steam–methane reforming cyclic process, and may be directly used in fuel cell applications.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11