Hydrogen has been gaining popularity as a new clean energy carrier, and bulk hydrogen production is achieved through the steam methane reforming (SMR) reaction. Since hydrogen produced via the SMR reaction contains large amounts of impurities such as unreacted reactants and byproducts, additional purification steps are needed to produce high-purity hydrogen. By applying the sorption-enhanced reaction (SER), in which catalytic reaction and CO2 byproduct removal are carried out simultaneously in a single reactor, high-purity hydrogen can be directly produced. Additionally, the thermodynamic limitation of conventional SMR reaction is circumvented, and the SMR reaction process becomes simplified. To improve the performance of the SER, a multisection packing concept was recently proposed. In this study, the multisection packing concept is experimentally demonstrated by applying it to a sorption-enhanced SMR (SE-SMR) reaction. The experimental results show that the SE-SMR reaction is significantly influenced by the reaction temperature, owing to the conflicting dependence of the reaction rate and the CO2 sorption uptake on the reaction temperature. Additionally, it is confirmed that more high-purity hydrogen (<10 ppm of CO) can be produced by applying the multisection packing concept to the SE-SMR reactions operated at sufficiently high temperatures where the SMR reaction is not limited by rate.
Bibliographical noteFunding Information:
This research was supported by the Energy Efficiency and Resources R&D Program ( 2011201020004A ) and the Human Resources Development Program ( 20134010200600 ) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant, funded by the Korean government's Ministry of Trade, Industry & Energy. The authors also acknowledge the Korea Research Council of Fundamental Science and Technology (KRCF) for the additional support received from the National Agenda Program (NAP).
© 2015 Elsevier B.V.
Copyright 2015 Elsevier B.V., All rights reserved.
- CO sorption
- High-purity hydrogen
- Multisection packing
- Sorption-enhanced reaction
- Steam methane reforming reaction
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering