CAJ | 학술논문

选取稻草、水洗稻草及添加质量分数为5%KCl的微晶纤维素颗粒作为热解原料，进行固定床快速和慢速热解，研究稻草热解过程中全钾和四种赋存状态钾的析出规律以及四种赋存状态钾之间的相互迁移转化。结果表明，稻草热解过程中钾的析出率随温度变化分为两个区间，热解温度低于700益时钾的析出率受温度影响较小；热解温度高于700益时四种赋存状态钾相继达到释放点从而导致钾析出率急剧增加；热解过程中钾的析出主要是由水溶态和残渣态钾的减少造成；同时水溶态钾和有机态钾能够发生相互迁移转化；残渣态的碳骨架钾在热解时断裂，一部分转化成水溶态钾，一部分仍以残渣态钾存在。
선취도초、수세도초급첨가질량분수위5%KCl적미정섬유소과립작위열해원료，진행고정상쾌속화만속열해，연구도초열해과정중전갑화사충부존상태갑적석출규률이급사충부존상태갑지간적상호천이전화。결과표명，도초열해과정중갑적석출솔수온도변화분위량개구간，열해온도저우700익시갑적석출솔수온도영향교소；열해온도고우700익시사충부존상태갑상계체도석방점종이도치갑석출솔급극증가；열해과정중갑적석출주요시유수용태화잔사태갑적감소조성；동시수용태갑화유궤태갑능구발생상호천이전화；잔사태적탄골가갑재열해시단렬，일부분전화성수용태갑，일부분잉이잔사태갑존재。
Three materials including raw and water-washed ice straw, and microcrystalline cellulose with 5%KCl loaded were pyrolysed in the fixed bed reactor to investigate the transfer of potassium in four forms. The results indicate that the release of potassium changes little with pyrolysis temperature below 700 ℃, and the release of potassium dramatically increases with pyrolysis temperature above 700 ℃. During the rice straw pyrolysis, the transfer of four forms of potassium takes place, in which the water soluble and the potassium in residue decrease. It is confirmed that the potassium combined with carbon can be partly changed to water soluble, and the water soluble and organically bound potassium can exchange each other during pyrolysis.