Keown Daniel M, Favas George, Hayashi Jun-ichiro, Li Chun-Zhu
Department of Chemical Engineering, Monash University, P.O. Box 36, Monash, Vict. 3800, Australia.
Bioresour Technol. 2005 Sep;96(14):1570-7. doi: 10.1016/j.biortech.2004.12.014. Epub 2005 Feb 22.
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 (approximately 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.
甘蔗渣和甘蔗废料在一种新型石英流化床/固定床反应器中进行热解。对热解炭中钠、钾、镁和钙的定量分析表明，热解温度、加热速率、化合价和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。以缓慢加热速率（约10 K min⁻¹）进行热解，这些生物质样品中AAEM物种的挥发量最小（通常<20%）。快速加热速率（>1000 K s⁻¹），促进了挥发性物质与当前反应器配置下的炭之间的相互作用，在900℃热解过程中，甘蔗渣中约80%的钠、钾、镁和钙发生了挥发。对于甘蔗废料中的一价钠和钾，也观察到了类似的行为，但甘蔗废料中镁和钙的挥发始终受到限制。甘蔗渣和甘蔗废料中氯含量的差异不足以完全解释镁和钙挥发的差异。
