Experimental pulping kinetics of Pinus radiata cultivated in Chile
Author:
FÜLLGRAFF GÜNTHER R.,MELO DIÓGENES L.,CANALES EDGARDO R.
Abstract
We adapted the Purdue model for kraft pulping kinetics for Pinus radiata wood cultivated in Chile. We cooked P. radiata chips in a batch kraft reactor at three different bulk temperatures (150ºC, 160ºC, and 170ºC) and followed wood concentrations of lignin, cellulose, galactoglucomannans, and arabinoxylans along time for up to 3 h. We compared experimental data against the kinet-ic model and determined new optimal pre-exponential factors for each wood component at each temperature. The corrected kinetic model predicted experimental data fairly well for lignin, yield, cellulose, and galactoglucomannans but was less satisfactory for arabinoxylans. The modified pulping kinetics model is more suitable for describing kraft cooking of local P. radiata species and has been validated through successful simulation of an industrial Kamyr digester.
Subject
Mechanical Engineering,General Materials Science,Media Technology,General Chemical Engineering,General Chemistry
Reference17 articles.
1. Smith, C. C., and Williams, T. J., Mathematical Modeling, Simulation and Control of the Operation of a Kamyr Continuous Digester for the Kraft Process. Tech. Rep. 64. Purdue University, West Lafayette, Indiana, USA, 1974. 2. Christensen, T., Albright, L.F., and Williams, T. J., A Mathematical Model of the Kraft Pulping Process. Tech. Rep. 129. Purdue University, West Lafayette, Indiana, USA, 1982. 3. Gustafson, R.R., Slelcher, C.A., McKean, W.T., and Finlayson, B.A., Theoretical Model of the Kraft Pulping Process, Ind. Eng. Chem. Process Des. Dev. 22 (1):87(1983). 4. Agarwal, N., Gustafson, R., A Contribution to the Modeling of Kraft Pulping, Can. J. Chem. Eng. 75:8(1997). 5. Yang, L., Liu, S., Kinetic Model for Kraft Pulping Process, Ind. Eng. Chem. Res. 44(18):7078 (2005).
|
|