Volatilisation of alkali and alkaline earth metallic species during the pyrolysis of biomass: differences between sugar cane bagasse and cane trash
Volatilisation of alkali and alkaline earth metallic species during the pyrolysis of biomass: differences between sugar cane bagasse and cane trash
复制标题
DOI：
10.1016/j.biortech.2004.12.014
复制
发表时间：
2005-09-01
影响因子：
11.4
通讯作者：
Li, CZ
中科院分区：
文献类型：
--
作者：
Keown, DM;Favas, G;Li, CZ
甘蔗渣和甘蔗叶在一种新型的石英流化床/固定床反应器中进行了热解。对炭中钠、钾、镁和钙的定量分析表明，热解温度、加热速率、化合价以及生物质类型是影响这些碱金属和碱土金属（AAEM）物种挥发的重要因素。在缓慢加热速率（约10 K/min）下进行热解，这些生物质样品中AAEM物种的挥发量极少（通常<20%）。快速加热速率（>1000 K/s）促进了挥发物 - 炭的相互作用（在当前反应器配置下），导致在900℃热解时甘蔗渣中约80%的钠、钾、镁和钙挥发。对于甘蔗叶中的一价钠和钾也观察到了类似的行为，但甘蔗叶中镁和钙的挥发总是受到限制。甘蔗渣和甘蔗叶之间氯含量的差异不足以完全解释镁和钙挥发的差异。（c）2005 Elsevier Ltd. 保留所有权利。
Sugar cane bagasse and cane trash were pyrolysed in a novel quartz fluidised-bed/fixed-bed reactor. Quantification of the Na, K, Mg and Ca in chars revealed that pyrolysis temperature, heating rate, valence and biomass type were important factors influencing the volatilisation of these alkali and alkaline earth metallic (AAEM) species. Pyrolysis at a slow heating rate (similar to 10 K min(-1)) led to minimal (often < 20%) volatilisation of AAEM species from these biomass samples. Fast heating rates (> 1000 K s(-1)), encouraging volatile-char interactions with the current reactor configuration, resulted in the volatilisation Of around 80% of Na, K, Mg and Ca from bagasse during pyrolysis at 900 degrees C. Similar behaviour was observed for monovalent Na and K with cane trash, but the volatilisation of Mg and Ca from cane trash was always restricted. The difference in Cl content between bagasse and cane trash was not sufficient to fully explain the difference in the volatilisation of Mg and Ca. (c) 2005 Elsevier Ltd. All rights reserved.