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Thermodynamics of Hydrogen Production Based on Coal Gasification Integrated with a Dual Chemical Looping Process
Author(s) -
Zhu Lin,
Li Luling,
Zhang Zheng,
Chen Hu,
Zhang Le,
Wang Feng
Publication year - 2016
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201400609
Subject(s) - chemical looping combustion , hydrogen production , hydrogen , coal gasification , process engineering , coal , chemistry , environmental science , thermodynamics , waste management , engineering , oxygen , physics , organic chemistry
The performance of an innovative hydrogen production technology, which is based on a coal gasification system integrated with a dual chemical looping process, namely, chemical looping air separation (CLAS) and calcium looping CO 2 absorption (CaL), is evaluated. CLAS offers an advantage over other mature technologies in that it can reduce capital costs considerably. CaL is an efficient method for hydrogen production and CO 2 capturing. The proposed technologies are studied by Aspen Plus based on the Gibbs free energy minimization principle. The key factors in terms of reduction temperature, gasification pressure, temperature of water‐gas shift reaction, and water consumption, which proved to have a significant impact on the performance of the whole hydrogen generation process, are discussed.