印尼油砂热重红外及基于AKTS动力学分析

doi:10.16085/j.issn.1000-6613.2017-1994

摘要/Abstract

摘要： 通过热重分析仪、傅里叶红外光谱仪和质谱仪对印尼油砂的热解过程和热解产物进行了探究，基于不同升温速率下的TG-DTG曲线，将热解过程分为两个阶段，即热解低碳化合物析出段和无机物高温受热分解段。升温速率相同时，YN₂油砂比YN1油砂挥发分析出的温度低。油砂热解产物是由脂肪烃、芳香烃、含氧官能团和羟基等组成的混合物，利用傅里叶红外光谱仪探究印尼油砂在不同升温速率下气体产物H₂O、CO₂、CO、CH₄、C_nH_m等的析出特性，气态烃类、含氧有机物等有机气体是由羰基和羧基以及甲氧基、亚甲基、甲基在热解低温段受热分解产生的，根据质谱图，确定了各个时刻逸出气体的种类和产量。利用AKTS软件基于F-W-O和Kissinger模型计算了油砂脱挥发分的热解动力学参数，计算结果表明，在相同的转化率下，不同升温速率的活化能呈线性分布，YN1的活化能高于YN₂的活化能。

关键词: 油砂, 热重-红外分析, 热解, AKTS, 热分析动力学

Abstract: Pyrolysis experiments of Indonesian oil sand were conducted on thermogravimetric analyzer, Fourier transform infrared spectrometer and mass spectrometer. Pyrolysis process and products of oil sands were analyzed. The results show that, based on the pyrolysis TG-DTG curves with different heating rates, the pyrolysis process was divided into two stages:release of low-carbon compounds and decomposition of inorganic substance at high temperature section. At same heating rate, the devolatilization temperature of YN2 oil sand is lower than that of YN1. The pyrolysis products mainly include:aliphatic hydrocarbons, aromatic hydrocarbons, oxygen-containing functional groups and hydroxyl groups. In this paper, the gas products produced at different heating rates were analyzed and explored, such as H₂O, CO₂, CO, CH₄ and C_nH_m. Gaseous hdrocarbons, oxygen-containing organic compounds and other organic gases are generated from the decomposition of carbonyl and carboxyl groups, as well as methoxy groups, methylene and methyl groups at low temperature during the pyrolysis process of oil sand. The gas types and yields change with pyrolysis time altering according to the mass spectrum. According to Kissinger and Friedman methods, the pyrolysis kinetic parameters of oil sand were calculated by utilizing AKTS software. The activation energy is distributed linearly at different heating rates for the data with same conversion rate. The activation energy of YN1 is higher than that of YN2

Key words: oil sands, TG-FTIR analysis, pyrolysis, AKTS, kinetics

中图分类号:

贾春霞, 于皓, 巩时尚, 陈佳佳, 刘洪鹏, 王擎. 印尼油砂热重红外及基于AKTS动力学分析[J]. 化工进展, 2018, 37(10): 3806-3817.

JIA Chunxia, YU Hao, GONG Shishang, CHEN Jiajia, LIU Hongpeng, WANG Qing. Thermogravimetric Fourier infrared and kinetic analysis of Indonesian oil sands based on AKTS[J]. Chemical Industry and Engineering Progress, 2018, 37(10): 3806-3817.

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