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Effect of dolomite on the thermokinetics of Biomass Pyrolysis

Organized by Gadjah Mada University, 4th - 5th December 2007 at Yogyakarta, Indonesia.

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Main Authors: Razi Ahmad, Ye Lwin, Mohd Noor Ahmad, Prof. Dr., Saiful Azhar Saad, Khudzir Ismail
Format: Working Paper
Language:English
Published: Gadjah Mada University 2008
Subjects:
Biomass pyrolysis
Kinetics of pyrolysis
Global kinetics
Dolomite
Thermogravimetry
Pyrolysis
Biomass energy
Online Access:http://dspace.unimap.edu.my/xmlui/handle/123456789/1899
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spelling my.unimap-18992008-09-02T08:14:25Z Effect of dolomite on the thermokinetics of Biomass Pyrolysis Razi Ahmad Ye Lwin Mohd Noor Ahmad, Prof. Dr. Saiful Azhar Saad Khudzir Ismail Biomass pyrolysis Kinetics of pyrolysis Global kinetics Dolomite Thermogravimetry Pyrolysis Biomass energy Organized by Gadjah Mada University, 4th - 5th December 2007 at Yogyakarta, Indonesia. Currently, the pyrolysis of biomass is paid much attention for the production of sustainable energy. However, suitable catalysts are needed for complete conversion of biomass to useful fuels at low temperature. This may also in-necessitate the use of high pressure in order to maximize the liquid yield. In this study, the catalytic effect of calcined dolomite on kinetic behavior of biomass pyrolysis has been examined thermogravimetrically. The thermogravimetric analyses were conducted during heating the biomass from room temperature to 800°C. The kinetic parameters for the pyrolysis were determined by analyzing the weight loss curves using the integral Coats-Redfern method on global kinetics with reaction order conversion function. The effect of dolomite as a catalyst and/or additive for the biomass pyrolysis was studied by comparing the kinetics with and without using the dolomite. Results showed that the presence of dolomite does not affect much on the rate of pyrolysis at low temperatures, but has significantly higher rate of pyrolysis at high temperatures. The global apparent activation energy increases slightly while the pre-exponential factor increases about two-fold in the presence of dolomite. The two-fold increase in the pre-exponential factor more than offsets the slight increase in the global apparent activation energy, thereby causing the net increase in the rate constant, especially at high temperatures. Thus, in light of the fact that catalysts should decrease the apparent activation energy to increase the reaction rate, it can be concluded that the dolomite acted as an additive rather than catalyst in the pyrolysis of biomass. The additive effect of dolomite may be only due to the decomposition of lignin and probably tar and char at high temperatures. 2008-09-02T08:14:25Z 2008-09-02T08:14:25Z 2007-12-05 Working Paper http://hdl.handle.net/123456789/1899 en 14th Regional Symposium of Chemical Engineering (RSCE 2007) Gadjah Mada University
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Biomass pyrolysis
Kinetics of pyrolysis
Global kinetics
Dolomite
Thermogravimetry
Pyrolysis
Biomass energy
spellingShingle Biomass pyrolysis
Kinetics of pyrolysis
Global kinetics
Dolomite
Thermogravimetry
Pyrolysis
Biomass energy
Razi Ahmad
Ye Lwin
Mohd Noor Ahmad, Prof. Dr.
Saiful Azhar Saad
Khudzir Ismail
Effect of dolomite on the thermokinetics of Biomass Pyrolysis
description Organized by Gadjah Mada University, 4th - 5th December 2007 at Yogyakarta, Indonesia.
format Working Paper
author Razi Ahmad
Ye Lwin
Mohd Noor Ahmad, Prof. Dr.
Saiful Azhar Saad
Khudzir Ismail
author_facet Razi Ahmad
Ye Lwin
Mohd Noor Ahmad, Prof. Dr.
Saiful Azhar Saad
Khudzir Ismail
author_sort Razi Ahmad
title Effect of dolomite on the thermokinetics of Biomass Pyrolysis
title_short Effect of dolomite on the thermokinetics of Biomass Pyrolysis
title_full Effect of dolomite on the thermokinetics of Biomass Pyrolysis
title_fullStr Effect of dolomite on the thermokinetics of Biomass Pyrolysis
title_full_unstemmed Effect of dolomite on the thermokinetics of Biomass Pyrolysis
title_sort effect of dolomite on the thermokinetics of biomass pyrolysis
publisher Gadjah Mada University
publishDate 2008
url http://dspace.unimap.edu.my/xmlui/handle/123456789/1899
_version_ 1643787495953924096
score 13.214268

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