摘要
利用热重分析仪(TGA)和固定床反应器对辽河Q块稠油在N_2和CO_2气氛下的热解过程及产物性质进行了研究。TGA实验结果表明,2种气氛下的稠油热解过程均可划分为轻组分与水分挥发、组分较弱化学键断裂和重组分裂解产油成焦3个阶段,热解曲线总体变化趋势类似。固定床反应器热解实验结果表明,随温度升高,2种气氛下的液体产物产率均升高,热解气和残余物产率均降低,CO_2气氛下650℃液体产物最大产率为61.53%。不同温度下热解所得液体产物和稠油的红外谱图显示,随热解温度升高,甲基含量增多、亚甲基含量减少。对液体产物的氧化过程进行TGA分析发现,随热解温度升高,其失重曲线向高温区明显偏移且失重程度减弱,CO_2热解所得液体产物的氧化失重比N_2快。
The pyrolysis process and product properties of Liaohe Q block heavy oil in N2 and CO2 atmosphere were studied by thermogravimetric analyzer (TGA) and a fixed-bed reactor, respectively.TGA results indicate that the pyrolysis process of heavy oil under the two atmospheres can be divided into 3 stages: light components and water volatile, weak chemical bond breakage, and heavy components cracking to form light oils and coke.TGA pyrolysis curves under either N2 or CO2 are similar.Pyrolysis experimental results with a fixed-bed reactor show that, under both N2 and CO2 atmosphere, liquid products yield increases with temperature, but pyrolysis gas and residue yields decrease as temperature goes up.The maximum liquid product yield is 61.53% under CO2 atmosphere at 650℃.The FT-IR spectra of both liquid products under different temperatures and the heavy oil feed show that, as pyrolysis temperature increases, methyl group contents increase but methylene group contents decrease.TGA analysis of the oxidation process of liquid products suggests that the mass loss curve obviously shifts to high temperature regions and the mass loss becomes less as pyrolysis temperature increases.Compared with those under N2 atmosphere, the oxidation mass loss rate of pyrolysis liquid products under CO2 atmosphere is faster.
作者
何勇
陈建标
户昶昊
郎雪梅
宫宇宁
王燕鸿
樊栓狮
HE Yong;CHEN Jianbiao;HU Changhao;LANG Xueme;GONG Yuning;WANG Yanhong;FAN Shuanshi(Key Laboratory of Enhanced Heat Transfer and Energy Conservation of the Ministry of Education,School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,China;Research Institute of Petroleum Exploration & Development,Liaohe Oilfield Company,CNPC,Panjin 124010,China)
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2019年第1期128-135,共8页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
中央高校基本科研业务费(2017BQ062)项目资助
关键词
稠油
热重
固定床反应器
产物分析
N2气氛
CO2气氛
heavy oil
thermogravimetric
fixed-bed reactor
product analysis
N2 atmosphere
CO2 atmosphere
