页岩灰和FCC催化剂调控油页岩热解产物二次反应特性
发布时间：2018-10-21 08:04
【摘要】：采用两段反应器对油页岩热解初级挥发分进行二次催化反应特性研究,考察了第2段反应器内不同的催化载体、反应气氛与停留时间对油气收率及品质的影响。结果表明,在考察的停留时间范围内页岩灰具有相对适中的催化活性来调控热解挥发分产物的二次反应,水蒸气气氛能够进一步提高热解油收率约5%,并能够在一定程度上抑制裂解气体中C_2~C_3组分的生成。页岩灰作为催化载体能够转化热解油中VGO(馏程350℃)等重质组分,随停留时间增加油品馏程向轻组分转移。油品组分GC-MS结果表明,较短停留时间内(3 s),水蒸气添加能够有效抑制热解油中脂肪烃类的过度裂解,与氮气相比提高汽柴油馏分含量20%以上。过长的停留时间(3~5 s)会造成VGO等馏分缩聚生成焦炭,从而大幅降低热解油收率。
[Abstract]:A two-stage reactor was used to study the secondary catalytic reaction characteristics of primary volatile compounds from oil shale pyrolysis. The effects of different catalytic carriers, reaction atmosphere and residence time on the oil and gas yield and quality in the second stage reactor were investigated. The results show that shale ash has relatively moderate catalytic activity to regulate the secondary reaction of pyrolytic volatile products in the range of residence time. The steam atmosphere can further improve the pyrolytic oil yield of about 5% and to some extent inhibit the formation of C_2~C_3 components in the pyrolysis gas. Shale ash can be used as catalyst carrier to transform VGO (distillation range 350 鈩，
本文编号：2284481
[Abstract]:A two-stage reactor was used to study the secondary catalytic reaction characteristics of primary volatile compounds from oil shale pyrolysis. The effects of different catalytic carriers, reaction atmosphere and residence time on the oil and gas yield and quality in the second stage reactor were investigated. The results show that shale ash has relatively moderate catalytic activity to regulate the secondary reaction of pyrolytic volatile products in the range of residence time. The steam atmosphere can further improve the pyrolytic oil yield of about 5% and to some extent inhibit the formation of C_2~C_3 components in the pyrolysis gas. Shale ash can be used as catalyst carrier to transform VGO (distillation range 350 鈩，
本文编号：2284481
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