Influence of temperature on the products from the flash pyrolysis of biomass
Influence of temperature on the products from the flash pyrolysis of biomass
复制标题
DOI：
10.1016/0016-2361(96)00081-6
复制
发表时间：
1996-07-01
期刊：
影响因子：
7.4
通讯作者：
Williams, PT
中科院分区：
文献类型：
--
作者：
Horne, PA;Williams, PT
将混合木材废料形式的生物质在流化床反应器中在400、450、500和550 ℃下热解。对炭、液体和气体产品进行了分析，以确定其元素组成和热值。特别是，对液体产品进行了详细分析，以确定与工艺条件有关的对环境有害的多环芳烃（PAH）和潜在的高价值含氧芳族化合物的浓度。释放的气体为CO2、CO和C1-C4烃。液体是均匀的，具有低粘度和高度氧化。液体的分子量范围为50-1300 μ。液体的化学分馏表明，只有少量的烃类存在和氧化和极性馏分占主导地位。PAH高达MW 252存在于液体中，一些PAH已被证明是致癌和/或致突变的。液体中PAH的浓度随着热解温度而增加，但即使在550 ° C的最高热解温度下，总浓度也< 120 ppmw。液体中含有大量的酚类化合物，苯酚及其烷基化衍生物的产率在500和550 ℃时最高。一些已鉴定的含氧化合物具有很高的价值。版权所有（C）1996 Elsevier Science Ltd.
Biomass in the form of mixed wood waste was pyrolysed in a fluidized bed reactor at 400, 450, 500 and 550 degrees C. The char, liquid and gas products were analysed to determine their elemental composition and calorific value. In particular, the liquid products were analysed in detail to determine the concentration of environmentally hazardous polycyclic aromatic hydrocarbons (PAH) and potentially high-value oxygenated aromatic compounds in relation to the process conditions. The gases evolved were CO2, CO and C-1-C-4 hydrocarbons. The liquids were homogeneous, of low viscosity and highly oxygenated. The molecular weight range of the liquids was 50-1300 u. Chemical fractionation of the liquids showed that only low quantities of hydrocarbons were present and the oxygenated and polar fractions were dominant. PAH up to MW 252 were present in the liquids; some of the PAH identified have been shown to be carcinogenic and/or mutagenic. The concentration of PAH in the liquids increased with pyrolysis temperature, but even at the maximum pyrolysis temperature of 550 degrees C the total concentration was < 120 ppmw. The liquids contained significant quantities of phenolic compounds and the yield of phenol and its alkylated derivatives was highest at 500 and 550 degrees C. Some of the oxygenated compounds identified are of high value. Copyright (C) 1996 Elsevier Science Ltd.