Huiwen Zhang
Hohai University
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Publication
Featured researches published by Huiwen Zhang.
Bioresource Technology | 2016
Miao Gong; Wei Zhu; Yujie Fan; Huiwen Zhang; Ying Su
The supercritical water gasification of ten different types of dewatered sewage sludges was investigated to understand the relationship between sludge properties and gasification products. Experiments were performed in a high-pressure autoclave at 400°C for 60 min. Results showed that gasification of sewage sludge in supercritical water consists mainly of a gasification reaction, a carbonization reaction and a persistent organic pollutants synthesis reaction. Changes in the reactant C/H/O composition have significant effects on the key gasification products. Total gas production increased with increasing C/H2O of the reactant. The char/coke content increased with increasing C/H ratio of the reactant. A decrease in the C/O ratio of the reactant led to a reduction in polycyclic aromatic hydrocarbon formation. This means that we can adjust the reactant C/H/O composition by adding carbon-, hydrogen-, and oxygen-containing substances such as coal, algae and H2O2 to optimize hydrogen production and to inhibit an undesired by-product formation.
Environmental Technology | 2014
Huiwen Zhang; Wei Zhu; Zhirong Xu; Miao Gong
Cyanobacterial collected from eutrophic freshwater lakes constituted intractable waste with a rich algae biomass content. Supercritical water gasification (SCWG) was proposed to treat the cyanobacterial and to produce hydrogen for energy. The H 2 yield reached 2.92 mol/kg at reaction conditions of 500 °C, 30 min and 22 MPa; this yield accounted for 26% of the total gaseous products. Abundant ammonia and dissolved reactive phosphorous were concentrated in the liquid product, which could be recovered and used as a liquid fertilizer. Solid residue, which accounted only for about 1% of the wet weight, was mainly composed of coke and ash. The efficiency of H 2 production was better than that from other biomass, because of the abundant organic matter in cyanobacterial. Thus, cyanobacterial are an ideal biomass feedstock for H 2 production from SCWG.
Applied Energy | 2013
Z.R. Xu; Weihua Zhu; M. Li; Huiwen Zhang; Miao Gong
Renewable Energy | 2014
Miao Gong; Weihua Zhu; Z.R. Xu; Huiwen Zhang; H.P. Yang
International Journal of Hydrogen Energy | 2013
Z.R. Xu; Weihua Zhu; Miao Gong; Huiwen Zhang
International Journal of Hydrogen Energy | 2014
Miao Gong; Weihua Zhu; Huiwen Zhang; Q. Ma; Ying Su; Yujie Fan
Archive | 2012
Wei Zhu; Zhirong Xu; Lei Li; Huiwen Zhang
Journal of Supercritical Fluids | 2016
Miao Gong; Wei Zhu; Huiwen Zhang; Ying Su; Yujie Fan
International Journal of Hydrogen Energy | 2016
Yujie Fan; Weihua Zhu; Miao Gong; Ying Su; Huiwen Zhang; J.N. Zeng
Archive | 2012
Wei Zhu; Zhirong Xu; Miao Gong; Huiwen Zhang