Study on co-pyrolysis and products of Chlorella vulgaris and rice straw catalyzed by activated carbon/HZSM-5 additives

• Published in: Bioresource technology 2022-09, Vol.360, p.127594-127594, Article 127594
• Main Authors: Chen, Chunxiang, Wei, Dening, Zhao, Jian, Huang, Xiaodong, Fan, Dianzhan, Qi, Qianhao, Bi, Yingxing, Liao, Liping
• Format: Article
• Language: English
• Subjects: Activated carbon; Bio-oil; Compound additives; HZSM-5; Microwave-assisted catalytic co-pyrolysis
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2022.127594

[Display omitted] •Synergistic effect of activated carbon (AC) and HZSM-5 was investigated.•AC promoted co-pyrolysis characteristics and achieved the optimal at 30% addition.•HZSM-5 facilitated the production of biochar while AC facilitated the yield of biogas.•20% A7H3 (AC/HZSM-5 = 7:3) obtained the maximum bio-oil production and the hydrocarbon. The weight loss characteristics, product distribution and bio-oil composition of co-pyrolysis of rice straw (RS) and Chlorella vulgaris (CV) were investigated by microwave oven. Then, the catalytic effect of activated carbon (AC) and HZSM-5 on these characteristics were studied. Results showed that AC strongly improved co-pyrolysis weight loss characteristics and obtained maximum average weight loss rate (Ra) at 30% addition with 0.01639 wt.%/s. While HZSM-5 promoted the characteristics as addition was lower than 10%. In the case of compound additives, 20% A7H3 obtained the maximum Ra (0.01413 wt.%/s). Furthermore, both single AC and HZSM-5 showed negative effect on bio-oil production, while 20% A7H3 (AC/HZSM-5 = 7:3) achieved the maximum production (24%). For bio-oil composition, 30% A10H0 showed strong selectivity for phenol and N-heterocycle and 10% A0H10 showed strong aromatization capacity, and the addition of 20% A7H3 increased the hydrocarbons content from 20.79% to 31.63% compared with the blank group.