燃料化学学报2012，Vol.40Issue(6)：660-665,6.
含氧/蒸汽气氛中煤高温分解产物分布及反应性
Product distribution and reactivity of coal pyrolysis at high temperature and in atmospheres containing O2/steam
摘要
Abstract
The product distribution and reactivity of coal pyrolysis at temperatures up to 850 ℃ and in atmospheres containing O2 and steam were studied. The effects of reaction temperature, equivalent air ratio (ER) and the mass ratio of steam to coal (S/C) were examined. The gas yield increased with the increases of the temperature, ER and S/C, whereas the yields of char and tar correspondingly decreased. When O2 was present in the atmosphere, the CO2 and CO productions obviously increased, while that of H2 decreased. The simultaneous presence of O2 and steam in the atmosphere improved the specific surface area and reactivity of the resultant char. However, the gasification reactivity of char produced at 900 ℃ in N2 and/or in an atmosphere with an ER 0. 22 at 850 ℃ was low because of occurrence of carbon graphitization. The inclusion of O2 and steam into the atmosphere had a great effect on the tar properties. Compared with pyrolysis in pure N2, the tar produced in O2 and steam contained fewer single-ring aromatics and phenolic, ketonic and aliphatic hydrocarbons, which made the tar more reactive for cracking and reforming.关键词
高温热解/水蒸气热解/部分氧化热解/产物分布/半焦气化Key words
high temperature pyrolysis/ steam pyrolysis/ partial oxidation pyrolysis/ product distribution/ char reactivity分类
化学化工引用本文复制引用
吴仕生,曾玺,任明威,汪印,徐绍平,许光文..含氧/蒸汽气氛中煤高温分解产物分布及反应性[J].燃料化学学报,2012,40(6):660-665,6.基金项目
国家自然科学基金(21006110) （21006110）
国家科技支撑项目(2009BAC641305,2010BAC66B01) （2009BAC641305,2010BAC66B01）
国家重点基础研究发展规划(973计划,2011CB201304) （973计划,2011CB201304）
国家高技术研究发展计划(863计划,2009AA02Z209). （863计划,2009AA02Z209）
