Steam gasification of coal cokes by internally circulating fluidized-bed reactor by concentrated Xe-light radiation for solar syngas production. (1st January 2015)

• Record Type: Journal Article
• Authors: Gokon, Nobuyuki; Izawa, Takuya; Kodama, Tatsuya
• Is Part Of: Energy. Volume 79:(2015)
• Page Start: 264
• Page End: 272
• Publication Date: 2015-01-01
• Subjects: Solar reactor -- Fluidized bed -- Coal cokes -- Steam gasification -- Solar fuel -- Beam-down optics; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2014.11.012
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: A laboratory-scale prototype windowed reactor using a fluidized bed of coal coke particles was tested for thermochemical gasification using concentrated Xe light radiation as an energy source. The fluidized-bed reactor, designed to be combined with a solar reflective tower or beam-down optics, is evaluated for steam gasification of coal coke according to gasification performance: CO, H2, and CO2 production rates; carbon conversion; light-to-chemical efficiency. Internal circulation of coal coke particles inside the reactor increases gasification performance, which is further enhanced by higher steam partial pressure of the inlet gas. Highlights: A reactor prototype was designed for solar steam gasification by beam-down optics. Particle circulation homogenizes temperature distribution across all bed layers. The reactor design of internal circulation improved gasification performances.