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钾元素对生物质及其三组分热解的影响

郝庆兰 ,  李博仑 ,  刘垒 ,  张征标 ,  豆宝娟 ,  王昶

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引用本文: 郝庆兰, 李博仑, 刘垒, 张征标, 豆宝娟, 王昶. 钾元素对生物质及其三组分热解的影响[J]. 燃料化学学报, 2015, 43(1): 34-41. shu
Citation:  HAO Qing-lan, LI Bo-lun, LIU Lei, ZHANG Zheng-biao, DOU Bao-juan, WANG Chang. Effect of potassium on pyrolysis of rice husk and its components[J]. Journal of Fuel Chemistry and Technology, 2015, 43(1): 34-41. shu

钾元素对生物质及其三组分热解的影响

    通讯作者: WANG Chang,Tel:+862260601433;E-mail:wangc88@163.com
  • 基金项目:

    Supported by the National Natural Science Foundation of China (21176191). (21176191)

摘要: 采用机械混合法将KCl加入到纤维素、半纤维素、木质素以及稻壳和稻壳模拟物等生物质中,得到了一系列不同K含量的生物质样品,通过热重(TG)实验考察了K元素对生物质热解特性的影响.结果表明,K元素对生物质三组分热解特性的影响比较复杂,纤维素的最大热解失重速率随着KCl添加量的增加而降低,但KCl对半纤维素和木质素热解特性的影响不显著.无论是否添加KCl,模拟生物质的热解特性均可以认为是三组分热解的简单叠加.但酸预处理稻壳三组分间的稳定结构,导致其DTG曲线在300 ℃左右的热解峰由稻壳模拟物的尖峰变为肩峰,其热解焦炭收率也比稻壳模拟物的略低.此外,实验还采用浸渍法向酸预处理稻壳中添加了KCl.TG实验结果表明,K元素的存在对生物质热解具有一定的催化作用,但KCl的添加方式不同,生物质的热解特性有明显差别,生物质样品经机械混合添加KCl后,其热解焦炭收率呈下降趋势(纤维素除外),浸渍法添加的KCl导致酸预处理稻壳的最大热解失重速率和焦炭收率升高.

English

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  • 收稿日期:  2014-09-15
  • 网络出版日期:  2014-12-03
通讯作者: 陈斌, bchen63@163.com
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