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Process Simulation and Energy Analysis of Chemical Looping Combustion and Chemical Looping with Oxygen Uncoupling for Sawdust Biomass
Author(s) -
Kevat Mayur D.,
Banerjee Tamal
Publication year - 2018
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.201700795
Subject(s) - chemical looping combustion , sawdust , solid fuel , combustion , biomass (ecology) , chemistry , coal , oxygen , pellets , waste management , pulp and paper industry , chemical engineering , process engineering , materials science , organic chemistry , oceanography , engineering , geology , composite material
The integral part of chemical looping combustion (CLC) and chemical looping with oxygen uncoupling (CLOU) for solid fuels such as biomass consists of an interconnected fluidized air and fuel reactor. The heat recovery/loss in both reactors needs to be analyzed to commercialize these novel fuels based on CLC and CLOU processes. Here, complete process level modelling of CLC and CLOU process is attempted and explored using the ASPEN simulator with sawdust as the biomass. Initially, a benchmarking study of CLC is performed to validate the CO 2 , CO, and CH 4 concentration in the fuel reactor and O 2 and CO 2 concentrations in the air reactor using 81.1 % Fe 2 O 3 (oxygen carrier) as the reactive component. Thereafter energy analysis is carried out with sawdust biomass using the catalyst combination of 60 % Fe 2 O 3 −Al 2 O 3 and 40 % CuO−ZrO 2 for CLC and CLOU, respectively. In biomass, for CLOU a 51 % conversion is realized in the fuel reactor and 48 % is realized in the air reactor. The energy analysis gave a difference in energy output between CLC and CLOU of 43 Watts i.e., 201 Watts in CLOU and 158 Watts in CLC.