섬유

kraft Pulping of Eucalyptus globulus: Kinetics of Residual Delignification.

  • 출판일2002.07
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 240
A kinetic model for residual delignification in Eucalyptus globulus kraft pulping revealed a mean value for lignin conversion at the transition between bulk and residual delignification of 95.5 percent for pulping at temperatures of 150-180 degrees centigrade and hydroxide ion concentrations of 0.7-1.6 moles. Pulping conditions determined the transition point with conversion to transition increasing with increased pulping temperature and alkali concentration. An Arrhenius type equation described the effects of cooking temperature on the transition rate constant. A power law function modeled the effects of the hydroxide ion concentration. The kinetic model yielded an activation energy of 86.1 kilojoules per mole and a kinetic order of 0.59 for the hydroxide ion concentration. 25 refs
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