Citation: ZHONG Mei, ZHAO Yuan, LI Xian, MA Feng-yun. Effects of K⁺, Ca²⁺ and Fe³⁺ on the distribution, structure and quality of the pyrolysis products of Hefeng coal[J]. Journal of Fuel Chemistry and Technology, ;2018, 46(9): 1044-1054. shu

Effects of K⁺, Ca²⁺ and Fe³⁺ on the distribution, structure and quality of the pyrolysis products of Hefeng coal

ZHONG Mei ^1,, ,
ZHAO Yuan ¹ ,
LI Xian ^1,2 ,
MA Feng-yun ^1,,

1.
Key Laboratory of Coal Clean Conversion & Chemical Engineering Process(Xinjiang Uyghur Autonomous Region), College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China
2.
State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China

Corresponding author: ZHONG Mei, zhongmei0504@126.com MA Feng-yun, ma_fy@126.com
Received Date: 29 March 2018
Revised Date: 23 June 2018

Fund Project: the National Natural Science Foundation of China 21766035The project was supported by the National Natural Science Foundation of China (21766035), the Key Project of Joint Fund from National Nature Science Foundation of China and the Government of Xinjiang Uygur Autonomous Region(U1703252)and Youth Science and Technology Innovation Personnel Training Project in Xinjiang Uygur Autonomous Region (QN2016BS0152)the Key Project of Joint Fund from National Nature Science Foundation of China and the Government of Xinjiang Uygur Autonomous Region U1703252Youth Science and Technology Innovation Personnel Training Project in Xinjiang Uygur Autonomous Region QN2016BS0152

Figures(9)

The nitrate solution of K⁺, Ca²⁺ and Fe³⁺ was used to treat Hefeng demineralized coal (DC) separately. The weight loss and gas evolution of coal samples were studied by thermogravimetric analyzer. It is found that the total weight loss of treated coal samples decreases, while the concentration of CO₂ and H₂ increases for treated samples. Then the distribution variation of products during the pyrolysis process of treated coal samples were investigated in a fixed bed reactor together with the analyses of elemental analysis, FT-IR, simulated distillation and GC-MS. The results indicate that the char and gas yields of treated coal samples rise, while the tar yields decline. The unsaturation and condensation of corresponded char samples exhibit a decreasing tendency. Under the action of these metal components, the percentage of light component in the tar increases, especially by 22.4% due to the effect of iron species. GC-MS analysis exhibits that long chain alkanes occupy about 70% of the total relatively, leading to the high content of heavy component in tar, which can be catalytically cracked by K and Fe species.
- demineralized coal,
- metal ion,
- catalytic pyrolysis,
- char structure,
- tar quality
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Effects of K+, Ca2+ and Fe3+ on the distribution, structure and quality of the pyrolysis products of Hefeng coal

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Effects of K⁺, Ca²⁺ and Fe³⁺ on the distribution, structure and quality of the pyrolysis products of Hefeng coal