【摘要】 为了探究咪唑类离子液体对煤传热特性的影响，选取艾维尔沟煤矿气肥煤，采用[BMIM][BF₄]、[BMIM][NO₃]、[BMIM][I]、[BMIM][PF₆]、[BMIM][NTf₂]处理原煤样，开展激光导热实验，测定出空气氛围下30～300℃内离子液体处理煤和未处理煤的热扩散系数、比热容和导热系数，得到离子液体对煤热物性参数的影响程度。结果表明：随着温度的上升，离子液体处理煤和未处理煤的热扩散系数先减小后增大，比热容增大后趋于稳定，且导热系数缓慢增大后又迅速增大；在相同温度下，离子液体处理煤的热扩散系数和导热系数均低于未处理煤，离子液体处理煤的比热容均高于未处理煤，且[BMIM][BF₄]处理煤的热扩散系数和导热系数最大减小了12.9%和7.3%，比热容最大增加了9.0%，高于其它离子液体对煤热物性参数的影响，[BMIM][BF₄]对煤传热特性抑制效果明显。更多还原

【Abstract】 To investigate the influence of imidazolium-based ionic liquids （ILs） on the heat transfer characteristics of coal,the gas-fat coal from Ewirgol Coal Mine was selected,and[BMIM][BF₄],[BMIM][NO₃],[BMIM][I],[BMIM][PF₆]and[BMIM][NTf₂]were adopted to treat coal.The laser heat conduction experiment was conducted to measure the thermal diffusivity,specific heat capacity,and thermal conductivity for ILs treated coal and untreated coal at 30–300℃under air atmosphere,and the influence of ILs on thermophysical parameters of coal was obtained.Results indicated that:with elevated temperature,the thermal diffusivity of ILs treated coal and untreated coal decreased and then increased,the specific heat capacity rose and then tended to be steady,and the thermal conductivity enhanced slowly and then increased rapidly.In fixed temperature,the thermal diffusivity and thermal conductivity of ILs treated coal were lower than that of untreated coal,but specific heat capacity was higher than that of untreated coal.Meanwhile,the thermal diffusivity and thermal conductivity of[BMIM][BF₄]treated coal decreased by 12.9%and 7.3%,respectively,and specific heat capacity increased by 9.0%,which was higher than the effect of other ILs on thermophysical parameters of coal.[BMIM][BF₄]had obvious inhibition effect on heat transfer characteristics of coal.更多还原