Product distributions and characterizations for integrated mild-liquefaction and carbonization of low rank coals

You, Quan; Wu, Shiyong; Wu, Youqing; Huang, Sheng; Gao, Jin‐Sheng; Shang, Jianzhong; Min, Xin; Zheng, Hongtao

doi:10.1016/j.fuproc.2016.09.022

Cited by 34 publications

(14 citation statements)

References 46 publications

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“…Co-pyrolysis of lignite/HDPE mixture at 450 and 500 • C gave higher yields of liquids and gases than pyrolysis of lignite of better quality (64.35% of carbon, dry basis, and net calorific value of 25.78 MJ/kg) at 600 • C [16]. The yields of liquid and gaseous products of lignite/HDPE co-pyrolysis at 500 • C are also higher than the yields of these products obtained by mild liquefaction of lignite (temperature of 450 • C and pressure of 11.5 MPa in the presence of solvent, catalyst, and hydrogen) [17], which contained nearly two times higher amount of carbon than lignite used in the current study. On the other hand, yields of liquid products obtained from pyrolysis of HDPE alone indicate that it cannot be concurrent to well-developed catalytic pyrolytic processes ( [22] and references therein).…”

Section: The Yields Of Pyrolysis Products Obtained By Open System Pyrolysismentioning

confidence: 98%

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Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal

et al. 2021

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The mutual impact of low-quality lignite and high-density polyethylene (HDPE) during open system pyrolysis was investigated, aiming to improve utilization of lignite with simultaneous treatment of HDPE waste. Pyrolysis of lignite, HDPE, and their mixture (mass ratio, 1:1) was performed at temperatures 400, 450, 500, 550, and 600 °C. Initial substrates and pyrolysis products were characterized by thermogravimetric analysis (TGA), gas chromatography–mass spectrometry (GC–MS), specific carbon isotope analysis of individual hydrocarbons (δ13C), Rock-Eval pyrolysis, and elemental analysis. The positive synergetic effect during co-pyrolysis of lignite/HDPE mixture was observed at temperatures ≥450 °C, with the greatest being at 500 °C. The highest yield of liquid co-pyrolysis products with a similar composition to that of crude oils is also noticed at 500 °C. The yields of liquid and gaseous products and quality of pyrolytic products obtained by co-pyrolysis of lignite/HDPE mixture are notably improved compared with pyrolysis of lignite alone. On the other hand, data obtained from pyrolysis of HDPE alone indicate that it cannot be concurrent to well-developed catalytic thermal processes for polymer recycling. However, concerning the huge amount of produced HDPE, at least part of this plastic material can be reused for advanced thermal treatment of lignite, particularly in countries where this low-rank coal represents the main source of energy.

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Section: The Yields Of Pyrolysis Products Obtained By Open System Pyrolysismentioning

confidence: 98%

“…Numerous studies were performed on lignite pyrolysis as a method for its improved utilization [ 15 , 16 , 17 ]. A recent strategy in bioplastics development concerns the extensive use of natural products.…”

Section: Introductionmentioning

confidence: 99%

Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal

et al. 2021

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“…Coal is also converted into liquid fuel either directly or indirectly, via liquefaction [52]. Direct coal liquefaction, industrialized in the western countries of the past century, is considered as an effective way to produce transportation fuels and chemicals [53]. Liquefaction employs severe conditions of temperature and pressure to achieve a significant productivity.…”

Section: Coal Derivativesmentioning

confidence: 99%

Comprehensive Two-Dimensional Gas Chromatography and Its Application to the Investigation of Pyrolytic Liquids

Maciel¹,

Silva²,

Bispo³

et al. 2017

Pyrolysis

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The chapter presents basic principles of one-dimensional gas chromatography (1D-GC) and comprehensive two-dimensional gas chromatography (GC × GC) related to the main advantages of the two-dimensional technique, as well as its application to the study of organic compounds in liquids derived from coal, mainly through pyrolysis and extraction. It also shows the investigation of compounds contained in bio-oils obtained from biomass through pyrolysis, using GC × GC. Advances in scientific knowledge related to the composition of these complex matrices are shown through different examples of GC × GC analyses, such as the identification of trace compounds that would not be perceived by 1D-GC, organized patterns of elution of structurally related compounds that help their identification, etc. Examples shown make it clear that GC × GC is the technique of choice to elucidate composition of these complex matrices.

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“…In this way, it will be possible to evaluate low-quality lignite coals economically. There are many studies on this subject in the literature [8][9][10][11][12][13][14]. In this study, the product yields and characterization of Konya-Ermenek lignite as a result of liquefaction were determined.…”

Section: Introductionmentioning

confidence: 98%

Investigation of the liquefaction possibility of Ermenek lignite as an alternative clean energy source

Korkmaz

2021

Journal of Physical Chemistry and Functional Materials

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ARTICLE INFOCoal liquefaction: can be defined as the transformation of coal into products that have a high energy density, can be easily stored and transported and do not create environmental pollution, to meet both fuel and chemical raw material requirements. This study was carried out to determine the yields of the products formed as a result of the liquefaction of Konya-Ermenek lignite in the N 2 atmosphere and under noncatalytic conditions. Proximate and ultimate analysis of the obtained solid and liquid products was made. The composition of the oil product was determined by GC-MS. As a result of liquefaction, the char yield was 71.37%, the preasphaltene yield was 12.24%, the asphaltene yield was 2.23% and the oil + gas yield was 14.16%. It was determined that the higher heating value of 4199 kcal/kg in raw lignite is twice as high in liquefaction products. It was determined that the sulfur content of 3.94% in raw lignite decreased to 1.54%, 0.85% and 0.44% in char, preasphaltene and oil, respectively.

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Product distributions and characterizations for integrated mild-liquefaction and carbonization of low rank coals

Cited by 34 publications

References 46 publications

Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal

Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal

Comprehensive Two-Dimensional Gas Chromatography and Its Application to the Investigation of Pyrolytic Liquids

Investigation of the liquefaction possibility of Ermenek lignite as an alternative clean energy source

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