Non-isothermal Kinetic Studies of Co-combustion and Co-cracking of Coal and Plastic Blends Using Thermogravimetric Analysis

Nabeel, A.I.; Khan, Tabrez Alam; Sharma, D. K.

doi:10.1080/15567030701752560

Cited by 7 publications

(4 citation statements)

References 9 publications

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“…Both the techniques of refining coal (i.e., inorgano-leaching) (Sharma and Gihar, 1991;Sharma and Singh, 1995a;Nabeel et al, 2009) using alkali-acid or acid alone as well as organo-refining (Sharma and Mishra, 1989;Mishra and Sharma, 1990;Sharma and Singh, 1996;Pande and Sharma, 2002) using common coal-derived and industrial organic solvents have been studied extensively by the research groups of the author.…”

Section: Introductionmentioning

confidence: 99%

The Steam Gasification of Coal under Milder Low Temperature Conditions—Nonisothermal Kinetics Studies for Reactor Design

Sharma

Singh

Mathew

2010

Energy Sources, Part A: Recovery, Utilization, and Environmenta

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Advanced systems of power generation, such as integrated gasification combined cycle power generation, are being demonstrated as the next generation of clean coal technology. It is important commercially to exploit the coal in such a way that premium and added value chemicals are recovered from coal before subjecting this to destructive gasification to yield the smallest molecules, such as H 2 and CO, from coal macromolecules (C 20 -C 240 ). In the present studies, original Talcher coal was subjected to organo-refining using coal-derived solvents, such as anthracene oil and liquid paraffin. The residual coal obtained from organo-refining was pyrolyzed in steam atmosphere. The kinetics of the low temperature steam gasification of the original coal, residual coal, and their chars was studied. These studies would help in designing the reactor for the steam gasification of coals, residual coals, and chars, thereof. These pretreatments beneficially disrupt the structure of coal by exposing more active sites on the surface, by exposing more mineral matter, and by affording sufficient residual volatile matter in treated coals/chars to render these reactive for the steam gasification.

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Section: Introductionmentioning

confidence: 99%

The Steam Gasification of Coal under Milder Low Temperature Conditions—Nonisothermal Kinetics Studies for Reactor Design

Sharma

Singh

Mathew

2010

Energy Sources, Part A: Recovery, Utilization, and Environmenta

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“…Based on plastic liquefaction technology, the co-pyrolysis technology of coal and waste plastics has developed [11]. Using solid plastic waste with a high proportion of H/C atoms as a hydrogen supply material plays a role in the hydrogen supply for the low-rank coal pyrolysis reaction process, which is beneficial to the improvement of liquid product yield [12,13]. The overlapping degradation temperature ranges of coal and plastic are beneficial to the migration of hydrogen from plastic to coal [14].…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis Characteristics of Hailar Lignite in the Presence of Polyvinyl Chloride: Products Distribution and Chlorine Migration

et al. 2022

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This study investigated the effects of polyvinyl chloride (PVC) addition on low-rank coal’s pyrolysis characteristics, especially the products distribution and chlorine migration. Hailar lignite (HLE) with different industrial, pure, PVC-content additions were prepared (the mass percentage of PVC addition was from 5% to 25%), and the co-pyrolysis characteristics of HLE and PVC were performed on a fixed-bed reactor and thermogravimetric analyzer. The chars were characterized with X-ray diffraction (XRD), X-ray fluorescence (XRF), and Fourier-transform infrared (FT-IR) spectroscopy analysis. The gas and tar compositions were analyzed by using gas chromatography (GC) and a gas chromatography–mass spectrometry (GC–MS) system, respectively. The results indicate that the addition of PVC can increase the release amounts of CH4, C2H4, and C2H6, simultaneously reducing the release amount of CO2 and CO; the quality of pyrolysis tar was also improved, especially the alkane content in tar, which increased by 6.9%. The migration of chlorine in PVC was analyzed with the different PVC additions and terminal pyrolysis temperatures. It showed that the content of chlorine in the gas phase first increased with the increasing pyrolysis temperature, but at the terminal temperature of 600 °C, the chlorine in the gas phase began to decrease. The results of the co-pyrolysis char characterization show that the content of the alkali metal oxide gradually decreases in the char, and metal chloride appears during the pyrolysis process. In the co-pyrolysis reaction of coal and PVC, chlorine was fixed in the char, thereby reducing the distribution of chlorine in the gas phase. This also proves that the PVC pyrolysis process, with the participation of low-rank coal, can enrich chlorine into the solid phase, thus reducing the emission of chlorine in the gas phase.

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“…Nevertheless, negative synergistic effects, which can increase the yields of final residual chars, were observed during the co-pyrolytic process of polystyrene (PS) and coal. , To summarize, there were no general regulations which can be applied to forecast co-pyrolytic behavior of different plastic wastes and coal blends at the moment. Futhermore, to the best of our knowledge, a few studies about co-pyrolytic behavior of PVC and coal were conducted, but no efforts were devoted to investigating the synergistic effects beween PVC and coal in these works . PVC is applied in many industrial and civil fields, attributed to excellent chemical and physical resistance, so the amount of PVC waste is increasing rapidly and the treatment of these plastic wastes has become a crucial environmental concern.…”

Section: Introductionmentioning

confidence: 99%

“…Futhermore, to the best of our knowledge, a few studies about co-pyrolytic behavior of PVC and coal were conducted, but no efforts were devoted to investigating the synergistic effects beween PVC and coal in these works. 10 PVC is applied in many industrial and civil fields, attributed to excellent chemical and physical resistance, so the amount of PVC waste is increasing rapidly and the treatment of these plastic wastes has become a crucial environmental concern. Consequently, it is meaningful to explore the synergistic effects during the co-pyrolytic process of PVC blended with coals from China.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Synergistic Effects and Char Morphology during Co-pyrolysis of Poly(vinyl chloride) Blended with Different Rank Coals from Northern China

et al. 2015

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Co-pyrolytic technology of plastic wastes and coal has been widely studied as a promising method to dispose of plastic wastes. Evaluation on pyrolytic behavior and product properties is important for optimizing this technology. In this work, pyrolytic behavior of poly(vinyl chloride) (PVC) blended with two typical coals from northern China (Pingzhuang lignite and Shenmu bituminous) was investigated by applying a nonisothermal thermogravimetric analyzer. Furthermore, scanning electron microscopy technique (SEM) was applied to explore the surface morphology of residual chars. Thermal analysis curves of PVC/ coal blends showed nonadditivity performance meaning the existence of synergistic effects between PVC and coal during copyrolysis. Negative synergistic effects were observed in the temperature below about 370°C, whereas positive synergistic effects happened at high temperature. In the final pyrolytic temperature, the formation of volatiles was promoted due to synergistic effects. In addition, isoconversional method was applied to calculate activation energy, and nonadditivity performance on the mean activation energies of PVC/coal blends was also found. The SEM results showed the fractal dimensions of the residual chars from pyrolysis of PVC/coal blends were larger than those from isolated samples, and increased with the increment of coal blending ratio. This variation trend showed that the inhomogeneous degree of the residual char from PVC increased by copyrolysis with coals, which can improve its reactivity of gasification or combustion.

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Non-isothermal Kinetic Studies of Co-combustion and Co-cracking of Coal and Plastic Blends Using Thermogravimetric Analysis

Cited by 7 publications

References 9 publications

The Steam Gasification of Coal under Milder Low Temperature Conditions—Nonisothermal Kinetics Studies for Reactor Design

The Steam Gasification of Coal under Milder Low Temperature Conditions—Nonisothermal Kinetics Studies for Reactor Design

Pyrolysis Characteristics of Hailar Lignite in the Presence of Polyvinyl Chloride: Products Distribution and Chlorine Migration

Investigation on Synergistic Effects and Char Morphology during Co-pyrolysis of Poly(vinyl chloride) Blended with Different Rank Coals from Northern China

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