麦草制浆绿液苛化反应动力学研究  

A study on kinetics of causticization reaction in green liquor from wheat straw pulping

作　　者：夏新兴[1,2] 王芳[1,3] 孙珊[1] 胡谦[1] XIA Xin-xing WANG Fang SUN Shan HU Qian(College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou 310018, China State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China Engineering Research Center for Eco-Dyeing ＆ Finishing of Textiles of Ministry of Education of China, Zhejiang Sci-Tech University, Hangzhou 310018, China)

机构地区：[1]浙江理工大学材料与纺织学院,杭州310018 [2]华南理工大学制浆造纸工程国家重点实验室,广州510640 [3]浙江理工大学生态染整技术教育部工程研究中心,杭州310018

出　　处：《中华纸业》2017年第8期49-52,共4页China Pulp & Paper Industry

基　　金：制浆造纸工程国家重点实验室开放基金资助项目(201509);浙江理工大学科研启动基金资助项目(14012081-Y);化学工程与技术浙江省重中之重(一级)学科资助

摘　　要：针对非木材原料因高硅含量而困扰碱回收系统及白泥碳酸钙回用的现状,本文对麦草浆碱回收绿液进行了苛化反应宏观动力学研究。实验结果表明:硅酸钠与氢氧化钙的反应速率大于碳酸钠与氢氧化钙的反应速率;氢氧化钙与碳酸钠和硅酸钠的反应均属于二级反应,氢氧化钙与碳酸钠反应的活化能为4.10kJ/mol,氢氧化钙与硅酸钠反应的活化能为2.30kJ/mol。Due to high silica content in green liquor from nonwood pulping hindered the process of alkali recovery and recycling of causticizing calcium carbonate. We studied the kinetics of causticization reaction in green liquor from wheat straw pulping. The results showed that the reaction rate between sodium silicate and calcium hydroxide was faster than that between sodium carbonate and calcium hydroxide; the reaction between calcium hydroxide with sodium silicate and sodium carbonate were second order reaction; the activation energy between calcium hydroxide and sodium carbonate and between calcium hydroxide and sodium silicate are 4.10kJ/mol,2.30kJ/mol respectively.

关 键 词：麦草浆 绿液 苛化 动力学 活化能 

分 类 号：X793[环境科学与工程—环境工程] TS721.5[轻工技术与工程—制浆造纸工程]