Co-gasification of coal/biomass blends in 50 kWe circulating fluidized bed gasifier

被引：34
|
作者：
Mallick, Debarshi [1 ]
Mahanta, Pinakeswar [1 ,3 ]
Moholkar, Vijayanand S. [2 ,3 ]
机构：
[1] Indian Inst Technol Guwahati, Dept Mech Engn, Gauhati 781039, Assam, India
[2] Indian Inst Technol Guwahati, Dept Chem Engn, Gauhati 781039, Assam, India
[3] Indian Inst Technol Guwahati, Ctr Energy, Gauhati 781039, Assam, India
来源：
JOURNAL OF THE ENERGY INSTITUTE | 2020年 / 93卷 / 01期
关键词：
Coal; Biomass; Co-gasification; Syngas; Synergy; BIOMASS STEAM GASIFICATION; SUB-BITUMINOUS COAL; PALM KERNEL SHELL; WOOD PELLETS; AIR; REACTIVITY; CATALYSTS; LIGNITE; CHAR; ELIMINATION;
D O I：
10.1016/j.joei.2019.04.005
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：
This paper reports gasification of coal/biomass blends in a pilot scale (50 kWe) air-blown circulating fluidized bed gasifier. Yardsticks for gasification performance are net yield, LHV and composition and tar content of producer gas, cold gas efficiency (CGE) and carbon conversion efficiency (CCE). Net LHV decreased with increasing equivalence ratio (ER) whereas CCE and CGE increased. Max gas yield (1.91 Nm(3)/kg) and least tar yield (5.61 g/kg of dry fuel) was obtained for coal biomass composition of 60:40 wt % at 800 degrees C. Catalytic effect of alkali and alkaline earth metals in biomass enhanced char and tar conversion for coal/biomass blend of 60:40 wt% at ER = 0.29, with CGE and CCE of 44% and 84%, respectively. Gasification of 60:40 wt% coal/biomass blend with dolomite (10 wt%, in-bed) gave higher gas yield (2.11 Nm(3)/kg) and H-2 content (12.63 vol%) of producer gas with reduced tar content (4.3 g/kg dry fuel). (C) 2019 Energy Institute. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：99 / 111
页数：13
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