Lignite Thermal Upgrading and its Effect on Surface Properties

Jun Guan; De Min He; Bin Bin Song; Qiu Min Zhang

doi:10.4028/www.scientific.net/AMR.524-527.887

Paper Titles

An Experimental Investigation on Hydrogasification of Coal Chars in a Fixed Bed Reactor under High Pressure
p.863

Analysis of Products by Conventional and Microwave Induced Pyrolysis for Low Rank Coal
p.871

Desulfurization of Simulated Coking Benzene on Modified Activated Clay
p.876

Influence of Pyrolysis Temperature on the Gaseous Products of Lignite
p.883

Lignite Thermal Upgrading and its Effect on Surface Properties
p.887

Study on Brown Coal Pyrolysis
p.894

Study on the Scale of Rare Earth Mineral Lands Reserve in China
p.898

Synthesis of Sialon-Based Eco-Materials from Gold Mineral Tailings
p.902

Governance Practices of Dust in Feeder of Coal Handling System on Mine's Ground
p.906

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 524-527Lignite Thermal Upgrading and its Effect on...

Lignite Thermal Upgrading and its Effect on Surface Properties

Abstract:

Lignite samples, Huolinhe(HLH) and Xiaolongtan(XLT) lignites were used for experiments. Mild pyrolysis experiments were carried out by final temperature 150～450°C. Physical and chemical properties have been investigated using thermogravimetric, FTIR analysis, nitrogen adsorption and oxygen-functional group analysis. Besides, the changes of the surface properties during upgrading were characterized in detail. The results show that specific surface area and moisture-holding capacity have the trend of first decreases and then increases in the upgrading temperature range. Furthermore, the decomposition of the oxygen-bearing functional groups on the coal surface which reduced the moisture-holding capacity. Oxygen absorption experiments indicate that thermal upgrading could decrease the tendency of lignite to spontaneous combustion.

You might also be interested in these eBooks

Natural Resources and Sustainable Development II

View Preview

Info:

Periodical:

Advanced Materials Research (Volumes 524-527)

Pages:

887-893

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.524-527.887

Citation:

Cite this paper

Online since:

May 2012

Authors:

Jun Guan, De Min He, Bin Bin Song, Qiu Min Zhang

Keywords:

Lignite, Surface Properties, Thermal Upgrading

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] Shen G J, Zhang M X, Wang L G. Utilization way of lignite. Coal Processing & Comprehensive Utilization, 2005, (6):25–27.

Google Scholar

[2] Howard JB. Chemistry of coal utilization. New York: Wiley; 1981.chapter 12; 2nd supplement; p.665–668.

Google Scholar

[3] Bergins C. Mechanical/thermal dewatering of lignite: Part 2 Arheological model for consolidation and creep process. Fuel,2004, 83(3): 267–276.

DOI: 10.1016/j.fuel.2003.08.002

Google Scholar

[4] Zeng C, Clayton S, Wu H, Hayashi J, Li C. Effects of dewatering on the pyrolysis and gasification reactivity of Victorian brown coal. Energy Fuels, 2007, 21(2): 399–404.

DOI: 10.1021/ef060404y

Google Scholar

[5] Lorenza H, Carreab E, Tamurac M et al. The role of char surfacestructure development in pulverized fuel Combustion[J].Fuel,2000,79(10):1161-1172.

DOI: 10.1016/s0016-2361(99)00259-8

Google Scholar

[6] S. Yaman, N. Karatepe, et al. Influence of wet oxidation on the surface area and the porosity of some lignites[J].Fuel,2000,79(10): 1017-1022

DOI: 10.1016/s0016-2361(99)00234-3

Google Scholar