STUDY ON THE REACTION KINETICS OF SALT-CATALYZED ETHANOL-WATER PULPING OF ASPEN

摘要：

The delignification kinetics of salt-catalyzed ethanol-water pulping of aspen was studied in this paper. The pulping was carried out under the optimum conditions of liquid ratio of 1: 10, ethanol volume percentage of 65％, holding temperature of 175℃, holding time of 210 min, and MgCl2 dosage of 3％, and pulp components were analyzed to educe the relationship between lignin removal and carbohydrate dissolvability. The result showed that there was an obvious linear relationship between natural logarithm of lignin content and cooking time during the cooking. It indicated that delignification of aspen by the salt-catalyzed ethanol-water pulping followed a first order reaction. The activation energies of the mass delignification phase and the residual delignification phase were 51.85kJ/mol and 87.31kJ/mol respectively. It revealed that the saltcatalyzed ethanol pulping method was feasible to make pulp from aspen.

关键词： salt-catalyzed ethanol-water pulping aspen kinetics activation energy

作者: Jing Wang Jinghui Zhou Haiming Li Xuefeng Ding

作者单位: Liaoning Key Laboratory of Pulp and Paper Engineering, Dalian Polytechnic University, Dalian, Liaoning Province, 116034, China

会议类型: 国际会议

会议名称: 16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)

会议地点: 天津

会议语种:英文

页码: 539-543

在线出版日期: 2011-06-08（万方平台首次上网日期，不代表论文的发表时间）