Experimental and kinetic modeling of oxygen-enriched air combustion of paper mill sludge

Li, Kai; Quian, Xiao; Xiao, Han

doi:10.1016/j.wasman.2010.03.019

Cited by 29 publications

(6 citation statements)

References 19 publications

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“…microalgae, 26,27 core plywood, 9 beetroot and switchgrass, 28 sisal fibers, 29 lignocellulosic materials, 30 biomass micron fuel 31 ) and other solid fuels (e.g. coal, 28,32 sludge, 33 municipal solid waste 34 ) in different oxygen concentrations by TG analysis. In particular, where WS and PVC is concerned, Yu has compared the influences of different catalysts on the combustion of rice and wheat straw in air and oxygen-enriched atmospheres, 35 and has used single heating-rate Coats and Redfern method to obtain the activation energy.…”

Section: Introductionmentioning

confidence: 99%

Thermal behavior and kinetic analysis of co-combustion of wheat straw and polyvinyl chloride under different oxygen concentrations through thermogravimetry

Zhao

Wang

Zhang

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part A:

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Co-combustion characteristics of wheat straw with polyvinyl chloride under different oxygen concentration atmospheres were investigated using a thermogravimetric analyzer. Experimental samples included wheat straw, polyvinyl chloride, and their blends. The results showed that when the wheat straw was blended with polyvinyl chloride, there was an inhibition for devolatilization in the volatile combustion stage. However, during the char combustion stage, a promotion was observed. As the oxygen concentration increased from 10% to 40%, the ignition temperatures, burnout temperatures, and maximum reaction rate temperatures of all samples decreased, and the combustion characteristic factors ( SN) increased. The combustion of wheat straw was significantly affected by oxygen concentration, whereas the polyvinyl chloride and blends were affected relatively slightly. Especially, as the oxygen concentration increased from 30% to 40%, the combustion of polyvinyl chloride and blends improve slightly. The reason for this behavior is attributed to the diffusion effects of the oxygen and the microstructure changes of the samples. In addition, the activation energies of the co-combustion process under the four atmospheres, for all samples, were calculated by Flynn–Wall–Ozawa method. The kinetic results show that the diffusion effect of the oxygen influenced the apparent activation energies of combustion reaction and the compensation effect of activation energies exists.

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Section: Introductionmentioning

confidence: 99%

Thermal behavior and kinetic analysis of co-combustion of wheat straw and polyvinyl chloride under different oxygen concentrations through thermogravimetry

Zhao

Wang

Zhang

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part A:

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show abstract

“…If not to be handled properly, it will cause secondary pollution to the environment, and be a threat to health of human being and animals. Nowadays the harmless disposal of paper mill sludge has become an urgent problem [1].…”

Section: Introductionmentioning

confidence: 99%

“…Liao et al [8] investigated the thermal behavior of semi-anthracite coal, paper sludge and their blends during pyrolysis and combustion processes. Liu et al [1] investigated the characteristics of oxygen-enriched air combustion of paper mill sludge. However, reports about the characteristics of co-combustion of paper mill sludge and bituminous coal in air are rare.…”

Section: Introductionmentioning

confidence: 99%

Co-Combustion of Paper Mill Sludge and Bituminous Coal in Air Using Thermogravimetric Analyzer

Xiao

Tang

et al. 2013

AMR

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The combustion of paper mill sludge and bituminous coal in air was analyzed using a thermogravimetric instrument. TG and DTG curves for the blends lies between that of the individual fuels, and the main combustion characteristics of blends depended on individual fuels and followed the weighted average. As the blending ratio of paper mill sludge was increased from 10% to 90%, the ignite temperature (Ti) decreased from 529.6°C. to 275.6°C., and residual weight increased from 19.28% to 47.39%. The TG profiles of sample were almost the same at different heating rates, however there was a big difference between the DTG profiles. The maximum weight loss rate of sample increased obviously with the increment of heating rate. This work contributes to the comprehensive understanding of paper mill sludge and bituminous coal combustion and development of co-combustion technology.

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“…The Flynn-Wall-Ozawa's (FWO) and Kissinger-Akahira-Sunose's (KAS) isoconversional methods were used to yield dependency of the activation energy of reduction process on the degree of conversion. The Coats-Redfern method was always used to calculate the kinetic parameters of heterogeneous solid state thermal reactions [13][14]16] .…”

Section: Introductionmentioning

confidence: 99%

Combustion Kinetics of Pellets Made by Sewage Sludge, Pulverized Fuel Ash and River Sludge

Wang

Chen

et al. 2011

AMR

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By using sewage sludge together with river sludge and pulverized fuel ash to produce lightweight aggregates are useful techniques to reuse the sludge. The raw materials was pretreated and manufactured into pellets with diameter range 5mm-8mm and mixture ratio (dry basis) sewage sludge 30wt%, pulverized fuel ash 15wt% and river sludge 55wt%. In order to be more certain about the characters during the combustion process of the pellets at different heating rates, thermogravimetric analysis was employed to study the thermal dynamics. The differential thermogravimetry profiles showed that the combustion process of pellets include five phases and temperature up to the maximal weightlessness speed peak increase with increasing of heating rates. The comprehensive combustibility of pellet decreased with increasing of heating rates. By using improved Coasts-Redfern integration method to calculate the parameters of pellets combustion characteristics, establish the non-isothermal kinetics models and numerically simulate the procedure of sintered LWA. The research results can give service to the simulation of combustion dynamics of taking sewage sludge and other combustible solid-liquid waste materials as raw materials to produce lightweight aggregates by an innovative designed Arc Blade rotary kiln in Chongqing, China.

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Experimental and kinetic modeling of oxygen-enriched air combustion of paper mill sludge

Cited by 29 publications

References 19 publications

Thermal behavior and kinetic analysis of co-combustion of wheat straw and polyvinyl chloride under different oxygen concentrations through thermogravimetry

Thermal behavior and kinetic analysis of co-combustion of wheat straw and polyvinyl chloride under different oxygen concentrations through thermogravimetry

Co-Combustion of Paper Mill Sludge and Bituminous Coal in Air Using Thermogravimetric Analyzer

Combustion Kinetics of Pellets Made by Sewage Sludge, Pulverized Fuel Ash and River Sludge

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