摘要
随着一次能源不断消耗,油页岩以其丰富的储量备受关注,同时一次能源利用加剧了CO_(2)排放,导致不同程度的环境问题,研究表明CO_(2)可用于制取瓦斯气,因此,为了探究CO_(2)气氛对油页岩热解的影响,采用热重-红外联用技术探究5种不同混合气氛(CO_(2)与N_(2)不同比例混合)及不同升温速率下油页岩的热解失重情况,采用固相傅里叶红外光谱仪对固相产物进行检测,并运用peakfit软件将上述所得气/固相傅里叶红外光谱进行分峰拟合分析。结果表明:随CO_(2)浓度增加,油页岩热解总失重率呈微弱的先增后减趋势,质量变化速率峰值向高温区域移动,增大油页岩热解第3阶段的失重率,过量CO_(2)会抑制油页岩热解;随升温速率提高,油页岩热解总失重率减小;相同条件下,适量浓度CO_(2)使C_(n)H_(m)、CH_(4)生成量增加,过量CO_(2)会抑制其生成;对半焦而言,CO_(2)气氛使半焦中碳酸盐类振动强度减小,部分官能团的热解温度发生改变;相同热解条件下,CO_(2)气氛下半焦中官能团种类较多、强度较高,热解反应向高温区移动。
At present,with the continuous consumption of primary energy,oil shale has come into people′s sight with its rich reserves.At the same time,the use of primary energy has aggravated the emission of CO_(2),resulting in different degrees of environmental problems,and researches have shown that CO_(2)can be used to produce gas.Therefore,in order to explore the effect of CO_(2)atmosphere on oil shale pyrolysis,thermogravimetric infrared spectroscopy(TGA-FTIR)was used in this paper to explore the pyrolysis weight loss of oil shale under five different mixing atmospheres(CO_(2)and N_(2)mixed in different proportions)and different heating rates.Solid-phase Fourier infrared spectrometer was used to detect the solid-phase products.Peakfit software was used to perform peak fitting analysis of gas/solid phase Fourier infrared spectra.The results show that the total weight loss rate of oil shale pyrolysis shows a weak trend of first increasing and then decreasing with the increase of CO_(2)concentration,which makes the peak of weight loss rate move to the high temperature region,and increases the weight loss rate of oil shale pyrolysis in the third stage.Excessive CO_(2)inhibits the pyrolysis of oil shale.With the increase of heating rate,the total weight loss rate of oil shale pyrolysis decreases.Under the same conditions,moderate CO_(2)concentration increases the production of C_(n)H_(m)and CH_(4),while excessive CO_(2)inhibits their production.For semi-coke,the vibration intensity of carbonates in CO_(2)atmosphere decreases,and the pyrolysis temperature of some functional groups changes.Under the same pyrolysis conditions,there are more kinds of functional groups and higher intensity in the char under CO_(2)atmosphere,and the pyrolysis reaction moves to the high temperature region.
作者
柏静儒
郝田田
杨乐
王勃
王佳琦
BAI Jingru;HAO Tiantian;YANG Le;WANG Bo;WANG Jiaqi(Engineering Research Centre of Oil Shale Comprehensive Utilization,Ministry of Education,Northeast Electric Power University,Jilin,132012,China;Beijing Power Equipment Group Co.,Ltd.,Beijing 102401,China)
出处
《洁净煤技术》
CAS
北大核心
2022年第7期103-110,共8页
Clean Coal Technology
基金
2019年吉林省省内预算基本建设基金资助项目(2019C026)。
关键词
油页岩
热解
混合气氛
热重-红外
分峰拟合
oil shale
pyrolysis
mixed atmosphere
TGA-FTIR
peak-differentiating and imitating
