碳酸钙对纤维热解特性与产物形成规律的研究  

Impact of Calcium Carbonate on Fiber Pyrolysis Behavior and Product Formation

作　　者：魏琪 武书彬[1] 华文 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640

出　　处：《造纸科学与技术》2017年第6期45-51,共7页Paper Science & Technology

基　　金：广州市科技计划项目(201607020025)

摘　　要：探讨了添加20%碳酸钙的纤维素的热解特性与产物形成规律。结果表明,添加20%碳酸钙的纤维素热解最大失重温度增加,热解速率降低,热解出现滞后现象。随着热解温度的升高,热解气以及热解油的产量会随之增加,热解焦炭产量降低。对纤维素的热解产物分析可知:热解焦炭和热解气占比较小,但碳酸钙促进热解气的生成同时减少热解焦炭的生成;热解油的占比较大,其中脱水糖类产物含量较高且碳酸钙有助于纤维素热解生成脱水糖类物质尤其促进生成左旋葡萄糖的同分异构体3,4-脱水阿卓糖。通过研究碳酸钙对纤维热解特性与产物形成规律分析提出废纸资源化、无害化的高效利用方式。本工作为多次回用的废纸纤维进一步高效利用提供理论基础。The pyrolysis behavior and product formation of cellulose with 20% calcium carbonate addition are discussed. Experimental data indicated that the addition of 20% calcium carbonate resulted in raised temperature for maximum weight loss and reduced pyrolysis rate as well as retarded pyrolysis. It was found that enhancing the pyrolysis temperature led to the increased yield of pyrolysis gas and pyrolysis oil. The yield of coke,however,was reduced. The analysis of pyrolysis products demonstrated that the pyrolysis coke and pyrolysis gas accounted for a small proportion and that calcium carbonate promoted the formation of pyrolysis gas andsuppressed coke formation.It was also found that pyrolysis oil,which comprised great amount ofdehydrated sugar,accounted for a large proportion. Calcium carbonate favored the pyrolysis of cellulose to form dehydrated sugars,espcially 3,4-anhydroxtrose,an isomer of levoglucose. An efficient and harmless method of waste paper resource utilization is proposed. This work favors a theoretical basis for further efficient utilization of recycled paper fibers.

关 键 词：多次回用纤维 纤维素 碳酸钙 热解 

分 类 号：TS727.2[轻工技术与工程—制浆造纸工程]