Hydrogen production by non-catalytic partial oxidation of coal in supercritical water: The study on reaction kinetics. (13th April 2017)

• Record Type: Journal Article
• Authors: Ge, Zhiwei; Guo, Liejin; Jin, Hui
• Is Part Of: International journal of hydrogen energy. Volume 42:Number 15(2017)
• Page Start: 9660
• Page End: 9666
• Publication Date: 2017-04-13
• Subjects: Supercritical water -- Coal -- Hydrogen production -- Reaction kinetics -- Partial oxidation; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2017.02.018
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Supercritical water gasification (SCWG) has attracted great attention for efficient and clean coal conversion recently. A novel kinetic model of non-catalytic partial oxidation of coal in supercritical water (SCW) that describes formation and consumption of gas products (H2, CO, CH4 and CO2 ) is reported in this paper. The model comprises 7 reactions, and the reaction rate constants are obtained by fitting the experimental data. Activation energy analysis indicates that steam reforming of fixed carbon (FC) is the rate-determining step for the complete gasification of coal. Once CH4 is produced by pyrolysis of coal, steam reforming of CH4 will be the rate-determining step for directional hydrogen production. Highlights: A kinetic model for non-catalytic partial oxidation of coal in SCW is developed. Steam reforming of fixed carbon is the rate-determining step for coal gasification. CH4 is the rate-determining step for directional hydrogen production. The SCWG process of coal in reactor could be simulated by using the kinetic model.