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Performance Analysis of a New Integrated Gasification Technology Driven by Biomass for Hydrogen and Electricity Cogeneration with a Dual Chemical Looping Process
Author(s) -
Zhu Lin,
Chen Hu,
Zhang Zheng
Publication year - 2016
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201600011
Subject(s) - exergy , chemical looping combustion , cogeneration , biomass (ecology) , flue gas , exergy efficiency , wood gas generator , chemical energy , process engineering , process integration , waste management , combustion , heat exchanger , environmental science , electricity generation , chemistry , thermodynamics , engineering , coal , mechanical engineering , power (physics) , physics , oceanography , organic chemistry , geology
Abstract A process based on biomass gasification integrated with a dual chemical looping technology, namely, chemical looping air separation and iron‐based chemical looping combustion, is proposed to investigate the performance of hydrogen and electricity cogeneration from a thermodynamic perspective. The effects of four vital ratios, namely, steam to biomass, oxygen to biomass, Fe 2 O 3 to carbon, and flue gas to Mn 2 O 3 , on the thermodynamic performances of this process are investigated. Meanwhile, a T – Q diagram is involved in the validation of the feasibility of heat‐exchange networks in this process. In parallel, the system efficiencies (such as total energy efficiency and exergy efficiency) are evaluated. The exergy destruction of this process is also analyzed. As a result, the total energy and exergy efficiencies are calculated to be 66.23 and 58.10 %, respectively. Most exergy destruction is caused by the gasifier, which accounts for 40.90 % of the total exergy destruction.