Catalytic deoxygenation co-pyrolysis of bamboo wastes and microalgae with biochar catalyst. (15th August 2018)

• Record Type: Journal Article
• Authors: Chen, Wei; Li, Kaixu; Xia, Mingwei; Yang, Haiping; Chen, Yingquan; Chen, Xu; Che, Qingfeng; Chen, Hanping
• Is Part Of: Energy. Volume 157(2018)
• Page Start: 472
• Page End: 482
• Publication Date: 2018-08-15
• Subjects: Catalytic co-pyrolysis -- Deoxygenation -- Biochar catalyst -- Bamboo wastes -- Microalgae -- Bio-oil; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2018.05.149
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: Catalytic deoxygenation co-pyrolysis of bamboo wastes and microalgae with biochar catalyst was investigated in a fixed bed reactor to explore the deoxygenation effect and possible deoxygenation mechanism of biochar catalyst (resulted from bamboo wastes pyrolysis). Results showed that oil fraction yields from co-pyrolysis of bamboo wastes and microalgae decreased largely with biochar addition, but still maintained at 35–37 wt.%, while gas yields were enhanced greatly. As catalytic co-pyrolysis promoted the decomposition of long-chain fatty acids and O-species, and the formation of aromatics and phenols, therefore most oxygen in bio-oil vapor transformed to CO, CO2 and H2 O, and only 7–9 wt.% oxygen retained in oil fraction. It indicated that biochar catalytic co-pyrolysis could not only efficiently remove oxygen (over 90 wt.%), but also keep oil fraction yields. Moreover, the active O-containing groups and specific surface area of biochar catalyst decreased largely after catalytic co-pyrolysis. The possible reaction pathways of catalytic co-pyrolysis with biochar catalyst were proposed. Highlights: Study catalytic deoxygenation co-pyrolysis of bamboo and microalgae with biochar. Oil fraction yield reached 35 wt.% with only 7 wt.% oxygen retained. Introducing biochar catalyst increased aromatics and phenols content greatly. O remove degree was >90 wt.% in the form of CO, CO2 and H2 O. Biochar with active O-containing groups had excellent deoxygenation effect.