Gasification of different biomasses in a dual-bed gasifier system combined with novel catalysts with high energy efficiency
Gasification of different biomasses in a dual-bed gasifier system combined with novel catalysts with high energy efficiency
复制标题
DOI：
10.1016/j.apcata.2004.02.028
复制
发表时间：
2004-07-30
影响因子：
5.5
通讯作者：
Tomishige, K
中科院分区：
文献类型：
--
作者：
Asadullah, M;Miyazawa, T;Tomishige, K
利用双床气化炉结合新型催化剂，将黄麻棒、甘蔗渣、稻草和雪松木材锯末等各种生物质气化生成合成气。在823~923K温度范围内，生物质进料150 mg/min，ER=0.25，催化剂3g，气化条件下，碳转化率和CO、H-2、CH4等有用气体的产率取决于生物质的性质。从有益气体的生成率来看，生物量的大小顺序为：雪松、黄麻棒、蔗渣、稻草。由于稻草灰分较高(22.6%)，在单床气化炉中气化比较困难，但在双床反应器系统中气化是可能的。与单床气化炉相比，采用Rh/CeO2/SiO_2催化剂的双床气化炉具有更高的煤气转化率和CO+H-2+CH4的产率。对于雪松木材气化，尽管在催化剂表面生成了少量焦炭，但即使在823K下也没有焦油生成，而对于其他生物质，特别是稻草，即使在高温(923K)下也会在催化剂表面生成大量焦炭和焦油。(C)2004爱思唯尔B.V.保留所有权利。
Syngas has been produced from the gasification of various biomasses such as jute stick, bagasse, rice straw, and saw dust of cedar wood using a dual-bed gasifier combined with a novel catalyst. The gasification conditions were 150 mg/min of biomass feeding, ER = 0.25, catalyst (3 g) at temperature range of 823-923 K. The carbon conversion to gas and yield of useful gases such as CO, H-2, and CH4 were dependent on the properties of biomass. In terms of the formation rate of useful gases, the biomass quality was in the order of cedar wood > jute stick > bagasse > rice straw. Although the rice straw gasification is comparatively difficult in a single-bed gasifier due to its high ash content (22.6%), it becomes possible in a dual-bed reactor system. The dual-bed gasifier using Rh/CeO2/SiO2 catalyst that has been developed gave higher conversion to gas and higher yield of CO + H-2 + CH4 than did the single-bed gasifier. In the case of cedar wood gasification, although a small amount of coke was formed on the catalyst surface, the tar was not formed at all even at 823 K. However, in the case of other biomass, especially for rice straw, a significant amount of coke on the catalyst surface and tar was formed even at the high temperature (923 K). (C) 2004 Elsevier B.V. All rights reserved.