title: A new approach for hydrogen generation from sewage sludge.
abstract: A new process to produce hydrogen efficiently from sewage sludge (SWS) was developed with co-grinding operation of the dried SWS with calcium and nickel hydroxides (Ca(OH)2 and Ni(OH)2) and subsequent heating of the ground mixture at relatively low temperature below 600°C. A set of analytical methods were used to characterize the ground samples before heating and the gaseous and solid products after heating. Thermo-mass spectroscopic (TG-MS) analysis showed hydrogen occurrence around 450°C. Hydrogen yield over 70g per kg SWS with concentration of 93.6% was obtained with the hydroxide additions of Ca to C from SWS at 1:1 and Ni to C at 1:6, respectively. X-ray diffraction (XRD) analysis of the solid residues after heating confirmed the existences of calcium carbonate and nickel metal. Based on the obtained results, possible reaction pathway was proposed.
authors.affiliation: School of Resources and Environment Engineering, Wuhan University of Technology, Wuhan 430070, China. Electronic address: zhangqw@whut.edu.cn.
authors.forename: Qiwu
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan.
authors.forename: Junya
authors.initials: J
authors.lastname: Kano
mesh_terms: D002126:Calcium Hydroxide / Q000737:chemistry; D006859:Hydrogen / Q000378:metabolism*; D006878:Hydroxides / Q000737:chemistry; D009532:Nickel / Q000737:chemistry; D012722:Sewage / Q000737:chemistry*
chemical_list: D006878:Hydroxides; D012722:Sewage; C037473:nickel hydroxide; D009532:Nickel; D006859:Hydrogen; D002126:Calcium Hydroxide
keywords: Catalyst; Hydrogen; Mechanochemical; Nickel hydroxide; Sewage sludge