西安科技大学学报2023，Vol.43Issue(6)：1071-1078,8.DOI:10.13800/j.cnki.xakjdxxb.2023.0605
宁夏灵新矿不粘煤的孔隙结构特征及其对CO吸附的影响
Adsorption of CO in Ningxia Lingxin non-caking coal based on fractal dimension
摘要
Abstract
In order to study the influence of fractal dimension on the adsorption of CO by non-caking coal in Lingxin coal mine of Ningxia,low temperature liquid nitrogen adsorption test and CO adsorption test were carried out.The pore structure characteristics of non-caking coal under different particle sizes were analyzed,and the effects of specific surface area and pore volume distribution on CO adsorption were discussed.The FHH model was used to calculate the fractal dimension of the pore of the coal sam-ple,and the relationship between the fractal dimension and the Langmuir parameters VLand PL was es-tablished,and the influence of the fractal characteristics of the pore of the coal sample on the CO ad-sorption was clarified.The results show that the number of micro-pores is the largest in all kinds of pore structures.With the decrease of coal particle size,the total specific surface area and total pore volume of coal samples increase.The total specific surface area and total pore volume of coal are positively cor-related with VL.Coal samples have different adsorption characteristics and fractal characteristics at low,medium and high pressure stages.The adsorption of CO by coal samples is affected by fractal dimension D1 and D2.With the increase of D1,the adsorption capacity of coal samples to CO increases.With the increase of D2,the adsorption capacity of coal samples to CO gradually decreases.The fractal dimension D.is positively correlated with VL and negatively correlated with PL.The correlation between fractal di-mension D2 and VL and PL is not obvious.The research results can provide a theoretical basis for the accurate monitoring of index gas in coal spontaneous combustion fires.关键词
分形维数/CO吸附/液氮吸附/粒径/孔隙结构Key words
fractal dimension/CO adsorption/liquid nitrogen adsorption/particle size/pore structure分类
矿业与冶金引用本文复制引用
赵奕博,田水承,黄剑,张铎..宁夏灵新矿不粘煤的孔隙结构特征及其对CO吸附的影响[J].西安科技大学学报,2023,43(6):1071-1078,8.基金项目
国家自然科学基金项目(51904234) （51904234）
