Study on Pore Structural Changes of Coal Carbonization by Small Angle X-ray Scattering Technology

XIAO Peng, ZHANG Shujiao, LI Dongfeng, XIE Fei, LI Zhihong

PDF(906 KB)
Chinese Journal of Light Scattering ›› 2020, Vol. 32 ›› Issue (1) : 90-94. DOI: 10.13883/j.issn1004-5929.202001012
Other Optical Spectroscopic Techniques and Applications

Study on Pore Structural Changes of Coal Carbonization by Small Angle X-ray Scattering Technology

  • XIAO Peng1, ZHANG Shujiao2*, LI Dongfeng2, XIE Fei3, LI Zhihong3
Author information +
History +

Abstract

Coal carbonization is one of important ways to use coal efficiently. Synchrotron radiation small angle X-ray scattering (SAXS) technology is an effective method to study the change of internal pore structure during the coal carbonization. In this paper, we used SAXS to characterize Yuwu (Shanxi) bituminous coal carbonization process (100~1200 ℃, the temperature difference between 100 °C) and analyzed the changes of fractal dimension and pore size distribution. The results indicated that the scattering image of samples was similar with each other, all of them presented isotropic characteristics and surface fractal structure during coal carbonization. The fractal dimension trended to increase on the whole. During the increase of coal carbonization temperature, the pore size distribution changed obviously. The results reflected that the structural characteristics of coal carbonization had different stages, which was of great significance for subsequent coal research.

Key words

Coal / Carbonization / Small Angle X-ray scattering / Fractal / Particle size distribution

Cite this article

Download Citations
XIAO Peng, ZHANG Shujiao, LI Dongfeng, XIE Fei, LI Zhihong. Study on Pore Structural Changes of Coal Carbonization by Small Angle X-ray Scattering Technology. Chinese Journal of Light Scattering. 2020, 32(1): 90-94 https://doi.org/10.13883/j.issn1004-5929.202001012

References

[1]Zhou G, Wu J, Miao Z, et al. Effects of process parameters on pore structure of semi-coke prepared by solid heat carrier with carbonization [J]. International Journal of Mining Science and Technology, 2013, 23(3):423-427.
[2]Mitropoulos A C, Stefanopoulos K L, Kanellopoulos N K. Coal studies by small angle X-ray scattering[J]. Microporous & Mesoporous Materials, 1998, 24(1-3):29-39.
[3]Radlinski A P, Mastalerz M, Hinde A L, et al. Application of SAXS and SANS in evaluation of porosity, pore size distribution and surface area of coal[J]. International Journal of Coal Geology, 2004, 59(3-4): 245-271.
[4]Okolo G N, Everson R C, Neomagus H W J P, et al. Comparing the porosity and surface areas of coal as measured by gas adsorption, mercury intrusion and SAXS techniques[J]. Fuel, 2015, 141(141): 293-304.
[5]Li Z, Wu Z, Mo G, et al. A small angle scattering station at Beijing Synchrotron Radiation Facility [J]. Instrumentation Science & Technology, 2014, 42(2): 128-141.
[6]雷晓蔚.小角X射线散射的数据处理[J].重庆大学学报(自然科学版),2006(07):106-108. (Lei Xiaowei. Data processing of small Angle X-ray scattering [J]. Journal of Chongqing University(Natural science edition),2006(07):106-108.)
[7]王维,陈兴,蔡泉,等.小角X射线散射(SAXS)数据分析程序SAXS 1.0[J].核技术,2007(07):17-21. (Wang Wei, Chen Xing, Cai Quan, et al. Small Angle X-ray scattering (SAXS) data analysis program SAXS 1.0[J]. Nuclear Technology, 2007(07): 17-21.)
[8]徐龙君,张代钧,鲜学福.煤微孔的分形结构特征及其研究方法[J].煤炭转化,1995(01):31-38.(Xu Longjun, Zhang Daijun, Xian Xuefu. Fractal structural characteristics and research methods of coal micropores[J]. Coal Conversion, 1995(01):31-38.)
[9]曾凡桂.煤的分形表面结构[J].煤炭转化,1995(02):7-13(Zeng Fangui. Fractal Surface Structure of Coal[J].Coal Conversion,1995(02):7-13.)
[10]谢飞.同步辐射小角X射线散射方法在煤炭干馏制备半焦和焦炭研究中的应用[D].合肥:安徽大学,2019,24-26.(Xie Fei, Application of synchrotron radiation small angle X-ray scattering on study of coal carbonization to prepare char and coke[D]. Hefei, Anhui university, 2019, 24-26.)
[11]高飞.不同煤阶煤干馏制焦炭过程中结构变化的研究[J].山西化工,2018,38(4):61-64.(Gao Fei. Study on the structural changes in coke production by dry distillation of different coal grades[J]. Shanxi Chemical Industry, 2018(4):61-64.)
[12]范晓雷,杨帆,张薇,等.热解过程中煤焦微晶结构变化及其对煤焦气化反应活性的影响[J].燃料化学学报,2006,34(4):395-398.(Fan Xiaolei, Yang Fan, Zhang Wei, et al.Variation of the crystalline structure of coal char during pyrolysisand its effect on gas if ication reactivity[J]. Journal of Fuel Chemistry, 2006,34(4): 395-398.)
PDF(906 KB)

94

Accesses

0

Citation

Detail

Sections
Recommended

/