Effect of temperature and dolomite on tar formation during gasification of torrefied biomass in a pressurized fluidized bed

被引：0

作者：

Berrueco, C. ^{[1
]}

Montané, D. ^{[1
,2
]}

Matas Güell, B. ^{[3
]}

del Alamo, G. ^{[3
]}

机构：

[1] Bioenergy and Biofuels Area, Catalonia Institute for Energy Research, IREC, C/Marcellí Domingo, 2, Tarragona 43007, Spain

[2] Departament d'Enginyeria Química, Universitat Rovira i Virgili, Av. Països Catalans, 26, Tarragona 43007, Spain

[3] Department of Thermal Energy, SINTEF Energy Research, NO-7465 Trondheim, Norway

来源：

Energy | 2014年 / 66卷

关键词：

Dolomite - Feedstocks - Chemical reactors - Cracks - Supersaturation - Tar - Fluidized beds - Gasification - Temperature - Fluid catalytic cracking - Fluidized bed furnaces;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

This work investigates the effect of temperature and bed material on the yields and composition of gas and tar produced from gasification of two types of biomass feedstock previously torrefied at 275°C. Special attention was devoted to the evolution of tar composition under the different experimental conditions. Experiments were conducted in a fluidized bed reactor using two different types of bed material (sand and dolomite) under a constant pressure of 0.5MPa and at two temperature levels (750 and 850°C). Tar destruction reactions promoted by the catalyst (dolomite) enhanced the production of some of the gas components (H2, CO2, CO and CH4) whereas C2 hydrocarbons decreased, this effect being slightly more relevant at 850°C. Comparable trends were observed with increasing temperature, which had a positive effect on cracking reactions and tar destruction. For both feedstocks, the increase in temperature resulted in (i) higher gas yields, and (ii) enhanced char gasification rate. On the other hand the evolution of tar yield and composition revealed a possible competition between two tar reaction pathways during gasification, (i) tar polymerization, and (ii) de-alkylation, dehydration and cracking of tars, depending on the experimental conditions and feedstock used. © 2013 Elsevier Ltd.

引用

页码：849 / 859