Rate determining step and kinetics of oxygen delignification

被引：0
|
作者：
Ji, Y. [1 ]
Vanska, E. [2 ]
Van Heiningen, A. [3 ]
机构：
[1] Natl Renewable Energy Lab, Golden, CO USA
[2] Helsinki Univ Technol, FIN-02150 Espoo, Finland
[3] Univ Maine, Orono, ME USA
来源：
PULP & PAPER-CANADA | 2009年 / 110卷 / 03期
关键词：
OXYGEN DELIGNIFICATION KINETICS; RATE DETERMINING STEP; CELLULOSE DEGRADATION KINETICS; KRAFT PULPS; HEXENURONIC ACID; KAPPA NUMBER; LIGNIN; CSTR;
D O I：
暂无
中图分类号：
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号：
0805 ; 080502 ; 0822 ;
摘要：
A differentially operated, continuous stirred tank reactor (CSTR) was used to study the kinetics of oxygen delignification. The delignification kinetics and reaction rate were determined at different temperatures, oxygen pressures and caustic concentrations on softwood kraft Pulps. The kinetics are first order in residual lignin content (HexA corrected). The kinetics of phenolic delignification can be described by assuming that the decomposition of the hydroperoxide anion at carbon 3 of the aromatic ring is the rate determining step. The cellulose degradation. kinetics were described by two contributions: one due to radicals produced by phenolic delignification, and the other due to alkaline hydrolysis.
引用
收藏
页码：29 / 35
页数：7
相关论文
共 50 条
  • [1] Rate determining step and kinetics of oxygen delignification
    Ji, Y.
    Vanska, E.
    Van Heiningen, A.
    Pulp and Paper Canada, 2009, 110 (03): : 29 - 35
  • [2] Kinetics of oxygen delignification
    Agarwal, SB
    Genco, JM
    Cole, BJW
    Miller, W
    JOURNAL OF PULP AND PAPER SCIENCE, 1999, 25 (10): : 361 - 366
  • [3] Kinetics of oxygen delignification
    Agarwal, SB
    Genco, JM
    Cole, BJW
    Miller, W
    PULPING CONFERENCE, VOLS 1-3, 1998, : 351 - 364
  • [4] The Kinetics of Oxygen Delignification of Reed Kraft Pulp(I)-Kinetics of Delignification
    Pan, Xiaofeng
    Ma, Lefan
    Qu, Qinqin
    Lan, Jialiang
    Tan, Lihong
    APPLICATION OF CHEMICAL ENGINEERING, PTS 1-3, 2011, 236-238 : 1420 - 1424
  • [5] Dimensionless parameter approach for oxygen delignification kinetics
    Dogan, Ismail
    Gueruez, Gueniz
    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2008, 47 (16) : 5871 - 5878
  • [6] Effect of kraft pulping on oxygen delignification kinetics
    Genco, JM
    Miller, W
    Zou, H
    Cole, BJW
    Liukkonen, A
    1997 PULPING CONFERENCE, BOOKS 1 AND 2, 1997, : 427 - 442
  • [7] Influence of kraft pulping on the kinetics of oxygen delignification
    Zou, H
    Liukkonen, A
    Cole, B
    Genco, J
    Miller, W
    TAPPI JOURNAL, 2000, 83 (02): : 65 - 71
  • [8] Kinetics of oxygen delignification of hardwood kraft pulp
    Valchev, I.
    Valcheva, E.
    Christova, E.
    Cellulose Chemistry and Technology, 1999, 33 (03): : 303 - 310
  • [9] Kinetics of oxygen delignification of hardwood kraft pulp
    Valchev, I
    Valcheva, E
    Christova, E
    CELLULOSE CHEMISTRY AND TECHNOLOGY, 1999, 33 (3-4): : 303 - 310
  • [10] KINETICS OF OXYGEN DELIGNIFICATION OF EUCALYPT KRAFT PULP
    VINCENT, AHD
    NGUYEN, KL
    MATHEWS, JF
    APPITA JOURNAL, 1994, 47 (03): : 217 - 220
12345