Microwave catalytic pyrolysis production and characterization of Chlorella vulgaris under different compound additives. (February 2022)

• Record Type: Journal Article
• Authors: Chen, Chunxiang; Zeng, Tianyang; Qi, Qianhao; Qiu, Hongfu; Zhao, Jian; Fan, Dianzhao
• Is Part Of: Journal of the Energy Institute. Volume 100(2022)
• Page Start: 160
• Page End: 169
• Publication Date: 2022-02
• Subjects: Microwave pyrolysis -- Compound additives -- Weight loss characteristics -- Energy consumption -- GC-MS analysis; Power (Mechanics) -- Periodicals; Power resources -- Periodicals; Fuel -- Periodicals; 621.04205
• DOI: 10.1016/j.joei.2021.11.008
• Languages: English
• ISSNs: 1743-9671

Abstract

Abstract: Microwave-assisted catalytic pyrolysis of Chlorella vulgaris was investigated under two compound additives blended of graphite (GP) with Fe2 O3 (Fe/GP) and ZSM-5 (ZM/GP). The effects of pyrolysis properties and products yields were evaluated using 10% of additives with different blending ratios (0:10, 3:7, 5:5, 7:3, and 10:0). The results showed that for the compound additives of Fe/GP, the maximum weight loss rate ( R m ), the total weight loss ( M t ) and bio-oil yield ( Y u ) of Chlorella vulgaris got the maximum value at a Fe2 O3 /GP ratio of 3:7 (sample Fe3GP7). As for ZM/GP, ZM5GP5 showed the strongest promoting effect based on R m, M t and Y u . In terms of energy consumption, the addition of compound additives can significantly reduce the energy consumption. Fe3GP7 and ZM5GP5 had the smallest energy consumption per unit of bio-oil ( W u ). The results of GC-MS analysis indicated that compound additives brought down the ratio of nitrogen-containing compounds and increased aromatic compounds in bio-oil. Moreover, ZM5GP5 showed more benefits compared to Fe3GP7 of this aspect. Highlights: Effects on microwave pyrolysis under Fe2 O3 with graphite and ZSM-5 with graphite were covered. The addition of compound additive reduce energy consumption per unit of bio-oil production. The optimal ratio for Fe2 O3 with graphite is 3:7, while ZSM-5 with graphite is 5:5. ZSM-5 with graphite can effectively reduce the nitrogen content in bio-oil.