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Microwave pretreatment on microalgae: Evolution of gas and char in chemical looping gasification
Author(s) -
Hu Zhifeng,
Jiang Enchen,
Ma Xiaoqian
Publication year - 2019
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.4337
Subject(s) - char , chemistry , pyrolysis , microwave , syngas , nuclear chemistry , hydrogen , oxygen , chemical engineering , microwave chemistry , fourier transform infrared spectroscopy , chemical looping combustion , microwave irradiation , organic chemistry , catalysis , physics , quantum mechanics , engineering
Summary Chemical looping gasification (CLG) of Chlorella vulgaris was investigated by TGA and FTIR technology. The release characteristic and evolution behavior of gaseous products and bio‐char in different conditions were analyzed to evaluate the effects of CLG and microwave pretreatment. The results indicated that the gas production of CLG was higher than that of SiO 2 :Chlorella, and it would be higher after microwave pretreatment. CO, CO 2 , and CH 4 were mainly produced in the pyrolysis and gasification stages. After adding Fe 2 O 3 , C―O, C═O, and C═C compounds decreased by 3.75%, 20.86%, and 24.72%, respectively. But more CO, CO 2 , and CH 4 were produced. Microwave pretreatment was helpful for reducing the degrees of hydrogen‐rich, aliphatic structure, aromatization, and oxygen‐rich in char. Moreover, microwave pretreatment promoted the reduction of C―O, C═O, and C═C compounds. However, CO increased by 55.63%, and CO 2 decreased by 2.31% in this condition. Therefore, microwave pretreatment was beneficial to CLG reaction.