摘要
考察了典型煤焦油(取自山西保德,下称BD)及新疆塔河减压渣油(VR)中沥青质的热转化反应性能差异。以热重分析方法模拟了2种正庚烷沥青质的热转化反应,发现BD正庚烷沥青质更易转化,250℃以上就有明显失重,VR正庚烷沥青质在400℃以上才会发生明显的热裂化反应。在催化临氢热转化过程中,BD正戊烷沥青质中的正庚烷沥青质同样更易发生转化,而且相同条件下反应体系中焦炭生成率更低;反应温度340℃时BD正庚烷沥青质转化率为98.87%,而360℃时VR正庚烷沥青质的转化率仅为35.33%;反应后产物中BD正庚烷沥青质氢碳比升高,芳香度降低,发生了明显的加氢反应,VR正庚烷沥青质则以发生脱烷基侧链反应为主。根据煤焦油沥青质反应的规律和原料性质,提出了以"最大化脱除中低温煤焦油中金属杂质,兼顾沥青质转化"为目的的中低温煤焦油浆态床加氢新思路,在高压釜小试条件下表现出了良好的原料适用性,值得进一步放大研究。
The thermal conversion reaction performances in hydrogen atmosphere of asphaltenes from Shanxi Baode coal tar(BD-C 7-ASP)and Xinjiang Tahe vacuum residue(VR-C 7-ASP)were studied.The results showed that the BD-C 7-ASP is easier to convert and the initial weight loss temperature is 250℃,while a significant pyrolysis of VR-C 7-ASP is observed at the temperature higher than 400℃.In slurry-phase reaction,BD-C 7-ASP is also more likely to be converted with less amount of coke at the same condition.The conversion rate of BD-C 7-ASP is 98.87%at 340℃,while the rate of VR-C 7-ASP is only 35.33%at 360℃.The H C of BD-C 7-ASP hydrogenation product is higher with lower aromaticity which indicates a significant hydrogenation occurred,while for VR-C 7-ASP the dealkylation of asphaltenes occurs mainly.On the basis of the properties of middle low temperature coal tar and the reactivity of asphaltenes from coal tar,a new slurry bed hydroprocessing route for the coal tar was proposed,in which the metal removal in the feedstock is maximized while the asphaltene conversion is considered.The new route showed a high adaptability of different feedstock in autoclave tests and a pilot study must be carried out for further study.
作者
王蕴
汪燮卿
吴治国
王卫平
王鹏飞
邹亮
Wang Yun;Wang Xieqing;Wu Zhiguo;Wang Weiping;Wang Pengfei;Zou Liang(SINOPEC Research Institute of Petroleum Processing,Beijing 100083)
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2019年第3期1-5,共5页
Petroleum Processing and Petrochemicals
关键词
沥青质
反应性能
热裂化反应
催化临氢热转化反应
asphaltene
reaction performance
thermal cracking
catalytic hydro-thermal conversion
