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

• 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

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.

本工作是对硫酸盐法脱木素反应的基础性研究 目的是确定关键的可测量的反应参数 可用于跟踪反应进程。 一种酒- 分析系统将用于监测一系列全面的 白酒特点 活性化学物质的消耗将 通过原位监测液体的电导率和通过 提取液样品的离子色谱法。 的数量 溶解的木质素将通过吸光度来监测。 凝胶渗透 色谱法将用于测量分子量 木质素的分布 循环水中的总溶解固体 将通过使用折射率检测器来测量液体。 一 基于这些测量的液体特性的动力学模型将 开发 这一结果将有助于开发一种基于 可测量的液体性质。 这样的控制系统将导致 通过产生均匀的纤维，提高了制浆操作的生产率 以更高的产量获得纸浆质量，并提高 制浆操作。 纸浆和造纸工业是世界第三大工业。 美国的 即使是产量的小幅度增加， 美元的影响。 这项工作可以加强对 木片蒸煮器因此产生更均匀的纸浆， 产品质量更高，产量更高。