Research Initiation: Kinetic Study of Kraft Delignificationby On-Line Sampling and Analysis

研究启动：通过在线采样和分析进行牛皮纸脱木质素动力学研究

基本信息

批准号：
8808875
负责人：
Gopal Krishnagopalan
金额：
$ 6.93万
依托单位：
Auburn University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1988
资助国家：
美国
起止时间：
1988-10-01 至 1991-03-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=8808875&HistoricalAwards=false
关键词：
Research Initiation Kinetic Study Kraft

项目摘要

This work is a fundamental study of the Kraft delignification reaction with the goal of identifying the key measurable reaction parameters that can be used for following the progress of reaction. A liquor- analysis system will be used to monitor a comprehensive array of liquor characteristics. Depletion of active chemicals will be measured by monitoring in-situ the conductivity of the liquor and by ion chromatography of the extracted liquor samples. The quantity of dissolved lignin will be monitored by absorbance. Gel permeation chromatography will be used to measure the molecular weight distribution of lignin. The total dissolved solids in the circulating liquor will be measured by using a refractive index detector. A kinetic model based on these measured liquor characteristics will be developed. The result will help develop a control system based on measurable liquor property. Such a control system will result in increased productivity of the pulping operation by producing a uniform quality of pulp at a higher yield and improve the overall economics of the pulping operation. The pulp and paper industry is the third largest industry in the United States. Even small increases in yield would have a large dollar impact. This work could lead to the enhanced control of the wood chip digester thus resulting in a more uniform pulp, higher product quality, and higher yield.

这项工作是对硫酸盐脱木质素反应的基础研究，目的是确定可用于跟踪反应进程的关键可测量反应参数。酒液分析系统将用于监测一系列全面的酒液特性。活性化学物质的消耗将通过监测液体的原位电导率和提取的液体样品的离子色谱来测量。溶解的木质素的量将通过吸光度来监测。凝胶渗透色谱法将用于测量木质素的分子量分布。使用折射率检测器测量循环液中的总溶解固体。将开发基于这些测量的液体特性的动力学模型。结果将有助于开发基于可测量液体特性的控制系统。这样的控制系统将通过以更高的产率生产均匀质量的纸浆而导致制浆操作的生产率提高，并提高制浆操作的整体经济性。纸浆和造纸工业是美国第三大工业。即使收益率小幅增长也会对美元产生巨大影响。这项工作可以增强对木片蒸煮器的控制，从而产生更均匀的纸浆、更高的产品质量和更高的产量。