Beneficial synergetic effect on gas production during co-pyrolysis of sewage sludge and biomass in a vacuum reactor. (May 2015)

• Record Type: Journal Article
• Authors: Zhang, Weijiang; Yuan, Chengyong; Xu, Jiao; Yang, Xiao
• Is Part Of: Bioresource technology. Volume 183(2015)
• Page Start: 255
• Page End: 258
• Publication Date: 2015-05
• Subjects: Co-pyrolysis -- Vacuum reactor -- Sewage sludge -- Biomass -- Synergetic effect; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2015.01.113
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Sewage sludge and biomass were co-pyrolyzed in a vacuum reactor. Remarkable synergetic effect on gas production was observed. Synergetic mechanism during co-pyrolysis was discussed. Abstract: A vacuum fixed bed reactor was used to pyrolyze sewage sludge, biomass (rice husk) and their blend under high temperature (900 °C). Pyrolytic products were kept in the vacuum reactor during the whole pyrolysis process, guaranteeing a long contact time (more than 2 h) for their interactions. Remarkable synergetic effect on gas production was observed. Gas yield of blend fuel was evidently higher than that of both parent fuels. The syngas (CO and H2 ) content and gas lower heating value (LHV) were obviously improved as well. It was highly possible that sewage sludge provided more CO2 and H2 O during co-pyrolysis, promoting intense CO2 -char and H2 O-char gasification, which benefited the increase of gas yield and lower heating value. The beneficial synergetic effect, as a result, made this method a feasible one for gas production.