Solar-driven biochar gasification in a particle-flow reactor

被引：97

作者：

Melchior, Tom ^{[1
]}

Perkins, Christopher ^{[2
]}

Lichty, Paul ^{[2
]}

Weimer, Alan W. ^{[2
]}

Steinfeld, Aldo ^{[1
,3
]}

机构：

[1] ETH, Dept Mech & Proc Engn, CH-8092 Zurich, Switzerland

[2] Univ Colorado, Dept Chem & Biol Engn, Ctr Engn, Boulder, CO 80309 USA

[3] Paul Scherrer Inst, Solar Technol Lab, CH-5232 Villigen, Switzerland

来源：

CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION | 2009年 / 48卷 / 08期

关键词：

Solar; Energy; Cavity; Reactor; Receiver; Hydrogen; Syngas; Biomass; Biochar; Gasification; Heat transfer; STEAM-GASIFICATION; CARBONACEOUS MATERIALS; HYDROGEN-PRODUCTION; CAVITY-RECEIVER; BED REACTOR; BIOMASS; TEMPERATURE; RADIATION; PYROLYSIS; ENERGY;

D O I：

10.1016/j.cep.2009.05.006

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The steam-gasification of biochar with concentrated solar radiation is experimentally investigated using a 3 kW solar reactor prototype consisting of a cylindrical cavity-receiver containing an opaque tubular absorber. Particles of beech charcoal are used as the biomass feedstock in a continuous steam-particle flow through the tubular absorber. A reactor model that couples radiative, convective, and conductive heat transfer to the chemical kinetics is formulated and validated by comparing numerically computed and experimentally measured temperatures and carbon conversions. The simulation model is further applied to examine the thermal performance of 100 kW and 1 MW scaled-up solar reactor containing multiple tubular absorbers, yielding a theoretical maximum solar-to-chemical energy conversion efficiency of 39% and 50%, respectively. Major sources of irreversibility are associated with re-radiation losses through the cavity's aperture. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1279 / 1287

页数：9

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