Oil production from mild pyrolysis of low-rank coal in molten salts media

Rizkiana, Jenny; Guan, Guoqing; Widayatno, Wahyu Bambang; Hao, Xiaogang; Wang, Zhongde; Zhang, Zhonglin; Abudula, Abuliti

doi:10.1016/j.apenergy.2015.05.092

Cited by 46 publications

(21 citation statements)

References 52 publications

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“…The liquid yield first increased to 27.32% at 600 C and then decreased to 20.67% at 800 C with molten salt, compared to 24.65% at 600 C and 19.07% at 800 C without salt. Besides, with the utilization of molten salt, the higher the pyrolysis temperature was, the more remarkable increase of gas yield was, which agrees with literature [16]. The gas yield increased from 28.3% to 46.1% at 800 C with salt.…”

Section: Resultssupporting

confidence: 90%

“…The liquid salt enabled the coal to be heated quickly and homogeneously due to the thorough dispersion of coal particles and high thermal conductivity of salts. Furthermore, alkaline metal-based molten salts could catalyze the pyrolysis process thus the reactivity of the coal increased [16].…”

Section: Resultsmentioning

confidence: 99%

“…According to above reactions, the use of alkali carbonates might increase the CO and H 2 yields. The introduction of molten salt could enhance the formation of CO 2 and H 2 O [16]. However, without introduction of an external and stable gasifying agent, the extent of coal gasification with CO 2 and H 2 O was less than that of carbon reacted with carbonates [22].…”

Section: Gas Analysismentioning

confidence: 99%

“…Only few study about molten salt pyrolysis of coal have been carried out. Rizkiana et al [16] employed Li 2 CO 3 -Na 2 CO 3 -K 2 CO 3 eutectics to pyrolyze low rank coal between 450 and 600 C in a dropdown batch reactor. The results demonstrated that molten carbonate salts would significantly enhance the liquid production yield by increasing the reactivity of the coal.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The effects of temperature and molten salt on solar pyrolysis of lignite

Zeng

Xie

et al. 2019

Energy

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Molten salt pyrolysis driven by concentrated solar radiation is well positioned to utilize solar energy and lignite effectively. This study focused on the effects of temperature (500, 600, 700 and 800 C) and molten carbonate salt (Li 2 CO 3-Na 2 CO 3-K 2 CO 3) on properties of char obtained from lignite pyrolysis, as well as gas and tar products for revealing their formation mechanism and transformation process. Molten salt pyrolysis of HulunBuir lignite produced more gas products and less char compared to conventional pyrolysis owing to the enhanced heat transfer and catalytic effect of molten salt. The char yield decreased from 58.4% to 43.4%, and the gas yield (especially CO 2 , H 2 and CO) increased from 28.3% to 46.1% at 800 C. CO 2 , CO and H 2 production increased about 60.43%, 103.42% and 65.2% at 800 C, respectively. Additionally, the presence of molten salt improved the tar quality with more hydrocarbon content (maximum increase of 5.8%) and less oxygenated compounds. The structure and reactivity relationship of char was characterized by XRD, BET, SEM, FTIR, Raman spectroscopy and TGA. Molten salt generated char had a higher reactivity due to the increase of disorder, surface area, microporosity (maximum of 71.74%) and active sites.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Gas Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The effects of temperature and molten salt on solar pyrolysis of lignite

Zeng

Xie

et al. 2019

Energy

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“…For the slagging catalyzed process, the alkali carbonate in the BFS could catalyze the coal gasification reaction based on the following reactions [42,43]. The carbon in the coal and the steam could be converted to CO and H 2 rapidly and effectively.…”

Section: Proposed Mechanism Of Steam Gasification In Molten Bfsmentioning

confidence: 99%

Experimental and kinetic study of steam gasification of low-rank coal in molten blast furnace slag

Duan

Liu

et al. 2016

Energy

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a b s t r a c tIn this study, the isothermal tests for steam gasification of Dezhou (DZ) low-rank coal with molten blast furnace slag (BFS) were performed in a lab-scale continuous gasification system, to investigate the status of gasification and syngas production. The results showed that molten BFS provided the heat needed for gasification reaction to ensure gasification is successful. The carbon conversion efficiency (CE), cold gasification efficiency (CGE) and percentage of combustible gas were higher than 85%, 100% and 87%, respectively. Meanwhile, thermo-gravimetric kinetic experiments were conducted to obtain the role of BFS in low-rank coal gasification. The study found that carbon conversion at a certain time was significantly enhanced with BFS as heat carrier. The reactivity index of coal was also improved under this condition. The reactivity index of coal with steam to coal (S/C) ratio of 1:2 was approximately 1.98 times higher than that with S/C ratio of 1:0 at 1673 K. The most probable kinetic mechanism model of DZ lowrank coal turned from D 2 model to A 2 model. Not only was BFS the heat carrier, but also it was the active catalyst in low-rank coal gasification. Eventually, the catalytic mechanism of coal gasification using BFS as heat carrier was schematically proposed.

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Catalytic upgrading of oil products generated by retorting Dachengzi oil shale over different catalysts

Wang,

Yan,

et al. 2024

J Therm Anal Calorim

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Oil production from mild pyrolysis of low-rank coal in molten salts media

Cited by 46 publications

References 52 publications

The effects of temperature and molten salt on solar pyrolysis of lignite

The effects of temperature and molten salt on solar pyrolysis of lignite

Experimental and kinetic study of steam gasification of low-rank coal in molten blast furnace slag

Catalytic upgrading of oil products generated by retorting Dachengzi oil shale over different catalysts

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