Co-pyrolysis kinetics of sewage sludge and oil shale thermal decomposition using TGA–FTIR analysis

2016 ◽  
Vol 118 ◽  
pp. 345-352 ◽  
Author(s):  
Yan Lin ◽  
Yanfen Liao ◽  
Zhaosheng Yu ◽  
Shiwen Fang ◽  
Yousheng Lin ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Sewage Sludge ◽  
Oil Shale ◽  
Ftir Analysis ◽  
Pyrolysis Kinetics ◽  
Kinetics Of

scholarly journals Influence of Liming on Kinetics of Sewage Sludge Pyrolysis

2019 ◽  
Vol 26 (1) ◽  
pp. 175-188
Author(s):  
Paweł Stolarek ◽  
Stanisław Ledakowicz ◽  
Radosław Ślęzak
Keyword(s):  
Thermal Decomposition ◽  
Sewage Sludge ◽  
Mass Loss ◽  
Kinetic Parameters ◽  
Heating Rate ◽  
Visual Analysis ◽  
Pyrolysis Kinetics ◽  
Exponential Factor ◽  
The Impact ◽  
Kinetics Of

Abstract Thermogravimetry (TG) is the fast and reliable method for characterization of thermal decomposition of any material and in particular to determine the kinetics of pyrolytic decomposition of sewage sludge. Two types of sewage sludge with and without addition of lime were investigated from kinetic point of view. For TG analysis samples of selected sewage sludge were heated under the inert atmosphere of argon with constant heating rate from 303 to 1273 K; the three heating rate β = 5, 10 and 20 K/min were chosen. The iso-conversion methods of Friedman and Ozawa-Flynn-Wall were employed for analysis of TG results. As the sewage sludge decomposition is very complex process it cannot be described by a simple stoichiometric equation, therefore the so called lumping of reactions in the selected temperature ranges were used with detailed principles arising from visual analysis of DTG curve. The deconvolution of DTG curves performed according to Fraser-Suzuki asymmetric profile allowed the identification of number of lumps and their contribution to the overall mass loss. So the decomposition of sewage sludge with lime addition could be described with five groups of reactions while the one without lime by means of six lumps. The thermal decomposition of sewage sludge was assumed to proceed according to the scheme of parallel concurrent independent reactions of n-th order. The values of the apparent activation energies at different constant values of conversion degrees were determined by the iso-conversion analysis. To estimate the kinetic parameters the non-linear regression with Levenberg-Marquart optimization procedure was used. The kinetic parameters such as activation energy, pre-exponential factor, reaction order and fraction of total mass loss associated with a given reaction were determined. The impact of sewage sludge liming revealed in essential differences of pyrolysis products and pyrolysis kinetics of limed sludge and without lime one was highlighted.

scholarly journals Thermal decomposition behaviour and numerical fitting for the pyrolysis kinetics of 3D spongin-based scaffolds. The classic approach

2021 ◽  
pp. 107148
Author(s):  
Sonia Żółtowska ◽  
Iwona Koltsov ◽  
Krzysztof Alejski ◽  
Hermann Ehrlich ◽  
Michał Ciałkowski ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Pyrolysis Kinetics ◽  
Numerical Fitting ◽  
Classic Approach ◽  
Thermal Decomposition Behaviour ◽  
Kinetics Of ◽  
Decomposition Behaviour

Pyrolysis kinetics of oil shale from northeast China: Implications from thermogravimetric and Rock–Eval experiments

Fuel ◽  
2015 ◽  
Vol 159 ◽  
pp. 776-783 ◽  
Author(s):  
Hui Han ◽  
Ning-ning Zhong ◽  
Cai-xia Huang ◽  
Wei Zhang
Keyword(s):  
Northeast China ◽  
Oil Shale ◽  
Pyrolysis Kinetics ◽  
Rock Eval ◽  
Kinetics Of

Effect of Heating Rate on Pyrolysis Kinetics of Göynük Oil Shale

2002 ◽  
Vol 24 (10) ◽  
pp. 931-936 ◽  
Author(s):  
Levent Değirmenci ◽  
Tülay Durusoy
Keyword(s):  
Heating Rate ◽  
Oil Shale ◽  
Pyrolysis Kinetics ◽  
Kinetics Of

PYROLYSIS KINETICS OF OIL SHALE FROM ULUKIŞLA, TURKEY

Oil Shale ◽  
2009 ◽  
Vol 26 (4) ◽  
pp. 491 ◽  
Author(s):  
H SÜTCÜ ◽  
S PİŞKİN
Keyword(s):  
Oil Shale ◽  
Pyrolysis Kinetics ◽  
Kinetics Of

Thermal processing of sewage sludge by drying, pyrolysis, gasification and combustion

2001 ◽  
Vol 44 (10) ◽  
pp. 333-339 ◽  
Author(s):  
P. Stolarek ◽  
S. Ledakowicz
Keyword(s):  
Thermal Decomposition ◽  
Sewage Sludge ◽  
Kinetic Parameters ◽  
Thermal Processing ◽  
Combustion Process ◽  
Order Kinetic ◽  
Municipal Sludge ◽  
Pyrolysis Kinetics ◽  
Exponential Factor ◽  
First Order

Thermal processing of sewage sludge including drying, pyrolysis and gasification or combustion may be an alternative to other ways of utilising it. In this paper thermogravimetric analysis (TGA) was employed in the investigation of thermal decomposition of sewage sludge. The kinetic parameters of drying, pyrolysis and gasification or combustion of sewage sludge have been determined in an inert-gas (argon) and additionally some series of the sludge decomposition experiments have been carried out in air, in order to compare pyrolysis and combustion. The pyrolysis char has been gasified with carbon dioxide. A typical approach to the kinetics of thermal decomposition of a solid waste is to divide the volatile evolution into a few fractions (lumps), each of which is represented by a single first-order reaction. If these lumps are assumed to be non-interacting and evolved by independent parallel reactions the first-order kinetic parameters such as activation energy Ei and pre-exponential factor Ai can be determined from mathematical evaluation of TG or DTG curves. The object of our investigations was a municipal sludge from the two wastewater treatment plants (WTP) in Poland. The experiments have been carried out in the thermobalance Mettler-Toledo type TGA/SDTA851 LF, in the temperature range 30-1,000°C. Five different values of heating rate have been applied β = 2, 5, 10, 15 and 20 K/min. The values of Ei and Ai have been determined for all recognised lumps of gaseous products. The method employed has also revealed its usefulness for the determination of kinetic parameters for municipal sludge, that possess an undefined content. An alternative route to combustion of sewage sludge is its gasification, which significantly increases the gaseous product (pyrolytic gas + syngas). Besides pyrolysis kinetics, gasification or combustion process kinetics have also been determined.

Multistep pyrolysis kinetics of North Korean oil shale

2014 ◽  
Vol 119 (1) ◽  
pp. 643-649 ◽  
Author(s):  
Wei Wang ◽  
Shuyuan Li ◽  
Changtao Yue ◽  
Yue Ma
Keyword(s):  
Oil Shale ◽  
Pyrolysis Kinetics ◽  
Kinetics Of

Kinetics on the Isothermal Decomposition of Oil Shale

2012 ◽  
Vol 581-582 ◽  
pp. 112-116 ◽  
Author(s):  
Hua Qing Xue ◽  
Hong Yan Wang ◽  
Gang Yan ◽  
Wei Guo ◽  
Xiao Bo Li ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Oil Shale ◽  
Kinetics Model ◽  
Isothermal Kinetics ◽  
Temperature Error ◽  
Isothermal Decomposition ◽  
Oil Shale Pyrolysis ◽  
Two Stages ◽  
Kinetics Of ◽  
Rapid Conversion

The kinetics of the thermal decomposition of Huadian oil shale was studied at five different isothermal atmospheres of 623K, 648K, 673K, 698K, and 723K. The temperature recorded was that of the sample that the temperature error between furnace and sample will eliminate. According to conversion data, the effect of increased temperature is to decrease the pyrolysis time. The conversion data described the oil shale pyrolysis as two stages, rapid conversion and modest conversion. The Arrhenius equations of ki=1.40×105e-109828/RT and kii=1.76×106e-130463/RT were obtain by isothermal kinetics model for each stage.

Thermogravimetric characteristics and pyrolysis kinetics of Giheung Respia sewage sludge

2010 ◽  
Vol 27 (1) ◽  
pp. 163-167 ◽  
Author(s):  
Mohd Roslee Othman ◽  
Young-Hun Park ◽  
Thanh An Ngo ◽  
Seung-Soo Kim ◽  
Jinsoo Kim ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Pyrolysis Kinetics ◽  
Kinetics Of
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