dc.contributor.authorHe, Chao
dc.contributor.authorWang, Ke
dc.contributor.authorGiannis, Apostolos
dc.contributor.authorYang, Yanhui
dc.contributor.authorWang, Jing-Yuan
dc.identifier.citationHe, C., Wang, K., Giannis, A., Yang, Y., & Wang, J. Y. (2015). Products evolution during hydrothermal conversion of dewatered sewage sludge in sub- and near-critical water: Effects of reaction conditions and calcium oxide additive. International Journal of Hydrogen Energy, 40(17), 5776-5787.en_US
dc.description.abstractIn the present study, hydrothermal conversion (HTC) of dewatered sewage sludge (DSS) under sub- and near-critical water has been performed to investigate effects of reaction temperature and pressure, moisture content of DSS, and calcium oxide (CaO) additive on evolution profile and characteristics of gas, solid, and liquid products. Although energy recovery rate decreased with increasing temperature and pressure, significant decarboxylation and dehydration reactions led to hydrochars with best fuel quality at 320 °C. High moisture content favored decarboxylation reaction but reduced H2 and CH4 yields. Compared to that in the absence of additive, H2 yield increased almost 6-fold at 380 °C and Ca/C molar ratio of 0.2, resulting in 58% H2 and 26% CH4 in final fuel gas. The results suggested that mineralization of heteroatomic compounds and dissolution of metals or mineral elements occurred during HTC. Under higher temperature and pressure, heavy metals or mineral elements were prone to be immobilized whereas dehalogenation became more distinct. CaO additive not only facilitated hydrolysis and deamination of organic compounds but also accelerated further fixation of inorganic elements and anions.en_US
dc.relation.ispartofseriesInternational Journal of Hydrogen Energyen_US
dc.rights© 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd.en_US
dc.subjectSubcritical wateren_US
dc.subjectHydrogen productionen_US
dc.subjectHeavy metalsen_US
dc.titleProducts evolution during hydrothermal conversion of dewatered sewage sludge in sub- and near-critical water: Effects of reaction conditions and calcium oxide additiveen_US
dc.typeJournal Article
dc.contributor.researchNanyang Environment and Water Research Instituteen_US
dc.contributor.researchResidues and Resource Reclamation Centreen_US
dc.contributor.schoolSchool of Civil and Environmental Engineeringen_US

Files in this item


There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record