CAJ | 학술논문

在小型反应釜上采用非极性有机溶剂四氢化萘（tetrahydronaphthalene, THN）对内蒙古锡林郭勒褐煤进行脱水，获取了不同温度下的脱水试样，运用傅里叶红外光谱（Fourier transform infrared spectroscopy，FT-IR）分析技术对比研究了在不同脱水温度下煤样中有机官能团的变化，通过FT-IR谱图的分峰拟合计算，对脱水煤样的化学结构变化特征进行半定量分析，并结合热重(thermal gravity analysis/differential thermal gravity，TG/DTG)和实验室固定床反应器(fixed bed reactor)考察了不同脱水温度下煤样的热解气化特性和热解气相产物分布规律，并对脱水煤样在最大失重速率区间的动力学参数进行了计算。试验结果显示：四氢化萘溶剂对褐煤的脱水提质是有效的，150～200℃时C O开始分解，而此时芳香环上的C C仍然相对稳定。随着脱水温度的升高，芳香类氢含量先减小后增大，脂肪类氢含量先增大后减小，芳香度和芳香碳在脱水温度范围内逐渐增大。煤样的脱水温度升高，热解气相产物 H2、CH4、CO 累积产率增大，CO2累积产率减小；脱水煤样热解活化能随着脱水温度的升高而升高，进而导致脱水温度较高煤样热解失重率降低。
재소형반응부상채용비겁성유궤용제사경화내（tetrahydronaphthalene, THN）대내몽고석림곽륵갈매진행탈수，획취료불동온도하적탈수시양，운용부리협홍외광보（Fourier transform infrared spectroscopy，FT-IR）분석기술대비연구료재불동탈수온도하매양중유궤관능단적변화，통과FT-IR보도적분봉의합계산，대탈수매양적화학결구변화특정진행반정량분석，병결합열중(thermal gravity analysis/differential thermal gravity，TG/DTG)화실험실고정상반응기(fixed bed reactor)고찰료불동탈수온도하매양적열해기화특성화열해기상산물분포규률，병대탈수매양재최대실중속솔구간적동역학삼수진행료계산。시험결과현시：사경화내용제대갈매적탈수제질시유효적，150～200℃시C O개시분해，이차시방향배상적C C잉연상대은정。수착탈수온도적승고，방향류경함량선감소후증대，지방류경함량선증대후감소，방향도화방향탄재탈수온도범위내축점증대。매양적탈수온도승고，열해기상산물 H2、CH4、CO 루적산솔증대，CO2루적산솔감소；탈수매양열해활화능수착탈수온도적승고이승고，진이도치탈수온도교고매양열해실중솔강저。
Dewatering and upgrading of Inner Mongolia Xilingol lignite in non-polar solvent (tetrahydronaphthalene, THN) were carried out in a miniature autoclave. The changes of organic functional groups in coal samples at different dewatering temperature were analyzed based on Fourier-transform infrared (FT-IR) analyzer. The fitting calculation for FT-IR spectra has been carried out. Besides, a semi-quantitative analysis for characteristics of chemical structure change was presented. The pyrolysis and gasification reactivity and distributive rules of gas phase product during pyrolysis and gasification of coal with various dewatering temperature were carried out by means of thermogravimetric analysis (TG) and a bench-scale fixed-bed pyrolysis reactor. The kinetic parameters of coal samples were calculated within the range of the maximum weight loss rate. The results showed that the non-polar solvent THN treatment was effective in dewatering and upgrading of Xilingol lignite. The CO bonds started decomposing between 150 and 200℃, while the aromatic CC bonds in the aromatic ring remained relatively stable. With increasing dewatering temperature, the content of aromatic hydrogen decreased first and then increased, while the content of aliphatic hydrogen increased first and then decreased. The aromaticity and aromatic carbon increased gradually with increasing dewatering temperature. When dewatering temperature was higher, the cumulative yields of gas phase products of H2, CH4and CO were increased and CO2 was dropped during pyrolysis. The reaction activation energy of the dewatered coal increased with increasing dewatering temperature, decreasing the pyrolysis reactivity of the coal samples.