
6
石油与天然气化工
CHEMICAL ENGINEERING OF OIL & GAS
渣油四组分吸附与裂化反应性能研究
高浩华
神华集团北京低碳清沽能源研究所
2016
摘要利用四组分分离装置,在富集一定量四组分的基础上,通过测量四组分在催化剂上饱和吸附量的方法定量表征了四组分的吸附性能。此外,利用小型固定流化床实验装置,在常规反应条件下(反应温度500℃,剂油质量比6,重时空速20h-1),考察了四组分的裂化反应性能。实验结果表明,四组分的吸附性能与裂化反应性能之间的排序存在较大的差异。饱和分裂化反应性能最强,其次为芳香分,胶质和芳香分裂化反应性能较为接近,沥青质最差;相比较裂化反应性能,胶质吸附性能最强,其次是芳香分,饱和分吸附性能最弱。
关键词渣油四组分吸附性能裂化反应性能
中图分类号:TE624.9
文献标志码:A
D0I:10.3969/i.issn.1007-3426.2016.05.002
StudyontheadsorbabilityandcrackabilityofresidSARA
GaoHaohua
(National Institute of Clean-and-Lowe-Carbon Energy + Shenhua Group Corporation Limited, Beijing 10221l, China) Abstract: By using self.made SARA separation device, amounts of SARA were obtained.The adsorbability of SARA was determined by measuring the saturated adsorption amount on the catalyst . The crackability of SARA was carried out in the fixed fulided reactor under conventional reaction conditions (reaction temperature of 5oo C, catalyst-to-oil weight ratio (CTO)of 6, weight hourly space velocity (WHSV) of 20 h-'). The results confirmed that the huge differences are existed between the order of adsorbability and crackability of resid SARA . The crackability of saturate is the best, followed by aromatic: the crackability of resin is close to that of aromatic; the worst is asphaltene. Compared to the crackability of SARA, the resin has the strongest adsorbability, followed by aromatic; the saturate is the weakest.
Key words : resid, SARA , adsorbability , crackability 催化裂化是典型的多相反应,各种烃类分子在催
化剂表面的吸附是催化裂化化学反应过程的第1步,对整个催化裂化反应过程具有重要的影响1-2]。由于不同种类的烃类分子在化学结构、分子尺寸和吸附热等方面的差异性1-5」,导致它们的吸附能力存在很大区别。根据现有研究表明5-」,不同的烃类分子在催化剂表面吸附能力的强弱大致如下:稠环芳烃>稠环环烷
且在同族烃类分子中,分子质量越大,则分子的吸附能力越强。但是,各种烃类化学反应能力大小顺序却与其吸附能力不相符合,大致情况为:烯烃>大分子单烷基侧链的单环芳烃>环烷烃>小单烷基侧链的单环芳烃>正构烷烃>稠环芳烃。因此,在催化裂化反应过程中,原料中吸附能力强而化学反应能力弱的烃类会
6 化剂开发。-整赠aohaohua_53(163.com