摘要
为了研究艾丁褐煤液化反应动力学,通过对煤液化产物进行分级处理,得到SO2-4/Fe2O3催化艾丁褐煤温和液化动力学模型,通过origin软件回归出各反应速率常数及相应的表观活化能和指前因子,最后对褐煤温和液化分级反应工艺提出初步设想。结果表明,模型能够较好地模拟动力学试验结果;液化反应中沥青质向酚转化的活化能为267.62 k J/mol,该过程对温度较敏感;反应组分的主要转化为油和沥青质,分别占48%和37%;随反应时间的延长,由沥青质转化得到的油和酚的量逐渐增加,由反应组分转化得到的油和酚的量先增加后趋于恒定,在一定时间内,反应组分是直接转化成油和酚的主要来源;沥青质向油的转化是油增加的速率控制步骤,沥青质向酚的转化是酚增加的速率控制步骤,在煤液化工艺流程中,实行分级加氢液化有利于控制、提高油和酚产率。
In order to study Aiding lignite liquefaction reaction kinetics,a kinetic model for Aiding lignite mild liquefaction reaction cata-lyzed by SO2-4 / Fe2 O3 was built using lumped kinetic method,where the liquefaction products were fractioned by solvents. The reaction rate constant,activation energy and pre-exponential factor were calculated by origin software. The initial idea of lignite mild liquefaction frac-tional reaction process was put forward. The results showed that the model could better fitting the kinetic experimental results. Activation energy of asphaltene to phenols in the liquefaction reaction was 267. 62 kJ/ mol,and the process was more sensitive to temperature. The main product from reaction components was oil and asphaltene,which accounted for 48% and 37% respectively. With the increase of reac-tion time,the amount of oil and phenol from asphaltene gradually increased,the amount of oil and phenol from reaction components in-creased first,then tended to be constant. In a certain time,the main source of oil and phenol was reaction components. The two reactions of asphaltene to oil and phenol controlled the oil and phenol formation rates respectively. In coal liquefaction process,it was beneficial to con-trol and improve oil and phenol yield by hierarchical hydrogenation liquefaction.
出处
《洁净煤技术》
CAS
2015年第3期69-74,共6页
Clean Coal Technology
基金
国家重点基础研究发展计划(973计划)资助项目(2011CB201303)
国家自然科学基金资助项目(U1261117)
国家国际科技合作专项资助项目(2013DFA61660)
关键词
艾丁褐煤
温和液化
动力学模型
酚
Aiding lignite
mild liquefaction
kinetic model
phenol
