{'fraction_non_alphanumeric': 0.04727921498661909, 'fraction_numerical': 0.0231935771632471, 'mean_word_length': 5.338983050847458, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Microwave pretreatment on microalgae: Evolution of gas and char in chemical looping gasification

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 SiO2:Chlorella, and it would be higher after microwave pretreatment. CO, CO2, and CH4 were mainly produced in the pyrolysis and gasification stages. After adding Fe2O3, C―O, C═O, and C═C compounds decreased by 3.75%, 20.86%, and 24.72%, respectively. But more CO, CO2, and CH4 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 CO2 decreased by 2.31% in this condition. Therefore, microwave pretreatment was beneficial to CLG reaction.