Experimental comparison of biomass chars with other catalysts for tar reduction
Experimental comparison of biomass chars with other catalysts for tar reduction
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DOI：
10.1016/j.fuel.2008.01.004
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发表时间：
2008-08-01
期刊：
影响因子：
7.4
通讯作者：
Brem, G.
中科院分区：
文献类型：
--
作者：
El-Rub, Z. Abu;Bramer, E. A.;Brem, G.
本文讨论了生物质半焦作为降焦催化剂的潜力。将生物质焦与用于焦油转化的其它已知催化剂进行比较。模型焦油化合物，苯酚和萘，用于测试焦炭和其他催化剂。试验在固定床管式反应器中在大气压下在700-900 ℃的温度范围内进行，并且在空催化剂床中的气体停留时间为0.3秒。将生物质焦与煅烧白云石、橄榄石、流化催化裂化（FCC）催化剂、生物质灰和工业镍催化剂进行了比较。在CO2和水蒸气气氛下，萘和苯酚在这些催化剂上的转化进行。在900 ℃时，苯酚的转化主要是热裂解，而萘的转化主要是催化转化。生物质焦的萘转化率最高的低成本催化剂用于焦油去除。此外，在气化过程中连续产生生物质炭，而其他催化剂经历失活。用一个简单的一级动力学模型来描述萘在生物质半焦中的转化。(C)2008爱思唯尔有限公司保留所有权利。
In this paper the potential of using biomass char as a catalyst for tar reduction is discussed. Biomass char is compared with other known catalysts used for tar conversion. Model tar compounds, phenol and naphthalene, were used to test char and other catalysts. Tests were carried out in a fixed bed tubular reactor at a temperature range of 700-900 degrees C under atmospheric pressure and a gas residence time in the empty catalyst bed of 0.3 s. Biomass chars are compared with calcined dolomite, olivine, used fluid catalytic cracking (FCC) catalyst, biomass ash and commercial nickel catalyst. The conversion of naphthalene and phenol over these catalysts was carried out in the atmosphere of CO2 and steam. At 900 degrees C, the conversion of phenol was dominated by thermal cracking whereas naphthalene conversion was dominated by catalytic conversion. Biomass chars gave the highest naphthalene conversion among the low cost catalysts used for tar removal. Further, biomass char is produced continuously during the gasification process, while the other catalysts undergo deactivation. A simple first order kinetic model is used to describe the naphthalene conversion with biomass char. (C) 2008 Elsevier Ltd. All rights reserved.