CAJ | 학술논문

研究了固定床上生物质热解过程中碱及碱土金属的迁徙规律，并结合扫描电镜-能谱分析对热解焦颗粒表面的相关无机元素富集状态进行了探索。研究发现在低温下钾的析出量较少，高温时则析出量迅速增加。钾的析出量与焦炭的堆积状态和生物质中的硅含量有较大关系。由于与焦炭的结合能力较弱，钠的析出比例较大。钙、镁在较低的热解温度下主要为有机钙、镁组分的分解，而在高温下则主要以较为稳定的形式存在于焦炭中。扫描电镜-能谱分析研究结果表明高温下生物质焦的形态稳定性与硅含量有关，钾元素的富集量与Cl存在明显的相关性。在焦炭的外表面，钾元素主要以硅酸盐形式存在，在焦炭的内表面，则主要以氯化钾形式存在。
연구료고정상상생물질열해과정중감급감토금속적천사규률，병결합소묘전경-능보분석대열해초과립표면적상관무궤원소부집상태진행료탐색。연구발현재저온하갑적석출량교소，고온시칙석출량신속증가。갑적석출량여초탄적퇴적상태화생물질중적규함량유교대관계。유우여초탄적결합능력교약，납적석출비례교대。개、미재교저적열해온도하주요위유궤개、미조분적분해，이재고온하칙주요이교위은정적형식존재우초탄중。소묘전경-능보분석연구결과표명고온하생물질초적형태은정성여규함량유관，갑원소적부집량여Cl존재명현적상관성。재초탄적외표면，갑원소주요이규산염형식존재，재초탄적내표면，칙주요이록화갑형식존재。
The releasing characteristics of alkali and alkaline earth metals (AAEMs) during biomass pyrolysis process were explored in a fixed bed reactor, and the enrichment of related inorganic elements inside and outside char particle surfaces was also researched using scanning electron microscope combined with energy-dispersive X-ray analytical system (SEM/EDX). It is found that the releasing amount of K at high temperature range increases obviously and is affected by the K adsorption capacity of char and the content of Si. The releasing proportion of Na is larger than K due to its weaker binding ability with char. The release of calcium and magnesium is mainly because of the decomposition of organic calcium and magnesium components during the pyrolysis process. SEM-EDX studies show that the Si content determines the integrity of biomass char under high temperature. The existence of K shows remarkable relationship with Cl. On the outer surface of char particles, the main existence form of K is silicate, but KCl on the inner surface.