Enhanced catalytic microwave pyrolysis of low-rank coal using Fe2O3@bluecoke absorber prepared by a simple mechanical ball milling

This paper describes the products characteristic derived from the conventional pyrolysis (CP) and microwave-assisted pyrolysis (MWP) of low metamorphic coal. GC/MS were used to analyze the volatile fractions of tar obtained by pyrolysis at different temperature and microwave power. It was found that microwave treatment produces more gas and oil than conventional pyrolysis at 800w and 800°C. In addition, the gas from the microwave has much higher syngas (H2+ CO) contents (up to 55 vol. %) than those obtained by conventional hydrolysis (up to 42 vol. %). The tar from the microwave is mainly composed of aromatic pyrolysis and phenolic compounds, and the content is 47.398% and 13.831% respectively as the microwave power is 800w. Meanwhile, the tar component content of C5-C10from microwave pyrolysis is up to 5 fold than conventional pyrolysis. By contrast, the microwave-assisted pyrolysis is beneficial to the tar conversion to light fraction.

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Products optimization by FeS2 catalyst for low-rank coal microwave pyrolysis

Fuel ◽

10.1016/j.fuel.2019.115759 ◽

2019 ◽

Vol 255 ◽

pp. 115759 ◽

Cited By ~ 6

Author(s):

Jun Zhou ◽

Lei Wu ◽

Jingjing Zhou ◽

Kun Liang ◽

Yonghui Song ◽

...

Keyword(s):

Low Rank ◽

Low Rank Coal ◽

Microwave Pyrolysis

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Temperature-rising characteristics and product analysis of low-rank coal microwave pyrolysis under CH4 atmosphere

Journal of Analytical and Applied Pyrolysis ◽

10.1016/j.jaap.2019.104632 ◽

2019 ◽

Vol 141 ◽

pp. 104632 ◽

Cited By ~ 6

Author(s):

Lei Wu ◽

Jun Zhou ◽

Jingjing Zhou ◽

Kun Liang ◽

Yonghui Song ◽

...

Keyword(s):

Low Rank ◽

Low Rank Coal ◽

Product Analysis ◽

Microwave Pyrolysis

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Research on the Microwave Pyrolysis of Coal under N2 Atmosphere

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.672-674.672 ◽

2014 ◽

Vol 672-674 ◽

pp. 672-675

Author(s):

Jun Zhou ◽

Zhe Yang ◽

Wen Zhi Shang ◽

Yong Hui Song ◽

Xin Zhe Lan

Keyword(s):

Flow Rate ◽

Microwave Power ◽

Loss Rate ◽

New Technology ◽

Low Rank ◽

Low Rank Coal ◽

Weight Loss Rate ◽

Pyrolysis Products ◽

Microwave Pyrolysis ◽

Liquid Products

Microwave pyrolysis of low rank coal is a new technology of cleaner production. The effect of microwave power and flow rate of N2 on the yield of pyrolysis products under N2 atmosphere was explored. The results showed that the higher microwave power was, the higher all the terminal temperature, the yield of liquid products and the weight loss rate were. The flow rate of N2 had little influence on the yield of pyrolysis solid products, while it exerted a greater influence on the yield of pyrolysis liquid products. When the low rank coal was pyrolysised under the conditions of microwave power of 800W and flow rate of N2 of 4.0×10-4 m3/min, the yield of Bluecoke and liquid products respectively reached 65.8% and 18%.

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Spectroscopic Analysis of Products from Low-Rank Coal Microwave Pyrolysis: Effect of Reaction Atmosphere

Journal of Applied Spectroscopy ◽

10.1007/s10812-020-01064-5 ◽

2020 ◽

Vol 87 (4) ◽

pp. 745-752

Author(s):

J. Zhou ◽

L. Wu ◽

K. Liang ◽

J. Zhou ◽

Q. Zhang ◽

...

Keyword(s):

Spectroscopic Analysis ◽

Low Rank ◽

Low Rank Coal ◽

Microwave Pyrolysis ◽

Reaction Atmosphere

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A Research on Microwave and Conventional Pyrolysis for Low Rank Coal

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1044-1045.209 ◽

2014 ◽

Vol 1044-1045 ◽

pp. 209-214

Author(s):

Yong Hui Song ◽

Xin Li ◽

Jun Wei Shi ◽

Xin Zhe Lan

Keyword(s):

Aromatic Hydrocarbon ◽

Phenolic Compound ◽

Gas Analysis ◽

Low Rank ◽

Western China ◽

Low Rank Coal ◽

Pyrolysis Products ◽

Microwave Pyrolysis ◽

Pyrolysis Tar ◽

Conventional Pyrolysis

In this paper, conventional pyrolysis (CP) and microwave pyrolysis (MWP) for three types of low rank coal in western China was studied. The effects of pyrolysis methods and temperature etc on product yields were also discussed. Pyrolysis products were characterized by IR, Gas analysis meter and GC-MS. Results showed that the tar and gas yields in microwave pyrolysis is about 3%-5% higher than those in the conventional pyrolysis. H2 and CO proportions in gas are above 55%. The contents of benzene, aromatic hydrocarbon and phenolic compound in microwave pyrolysis tar are higher than those in the conventional pyrolysis, in addition, C5~C10 substance content in tar is about 5 times as that in the conventional, so the microwave pyrolysis can prompt tar converting to light fraction.

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Contrastive Study on Microwave Pyrolysis Products of Coal under N2 and Non-N2 Atmosphere

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.672-674.601 ◽

2014 ◽

Vol 672-674 ◽

pp. 601-604

Author(s):

Zhe Yang ◽

Jun Zhou ◽

Qiu Li Zhang ◽

Xin Zhe Lan ◽

Xi Cheng Zhao

Keyword(s):

Research Method ◽

Low Rank ◽

Low Rank Coal ◽

Pyrolysis Products ◽

Microwave Pyrolysis ◽

Contrastive Study ◽

Peak Intensity ◽

Liquid Products ◽

Light Oil ◽

New Research

The microwave pyrolysis is a new research method for deeply processing of coal. This paper researched the microwave pyrolysis products of low rank coal under N2 and non-N2 atmosphere. The results showed that, compared with non-N2 atmosphere, the yield of liquid products increased by 4.65%, while the yield of solid bluecoke decreased by 2.95% under N2 atmosphere. The infrared characteristics absorption peak intensity of bluecoke obtained from N2 pyrolysis atmosphere was weaker; N2 contributed to the transformation of heavy oil into light oil.

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