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KRAFT划定反应的基本研究，其目的是识别可用于遵循反应进展的关键可测量反应参数。酒类分析系统将用于监测一系列的酒类特征。活性化学物质的耗竭将通过对原位监测酒的电导率和提取的酒样品的离子色谱法进行测量。溶解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。循环液中的总溶解固体将通过使用折射率检测器来测量。将开发基于这些测得的酒类特性的动力学模型。结果将有助于基于可测量的酒特性开发控制系统。这样的控制系统将通过以更高的产率产生纸浆质量并改善制浆操作的整体经济性，从而提高制浆操作的生产率。纸浆和造纸业是美国第三大行业。即使略有增加的收益率也会产生巨大的美元影响。这项工作可能会导致对木芯片消化池的控制增强，从而导致更均匀的纸浆，更高的产品质量和更高的产量。