焦化蜡油活化树脂吸附脱氮及反应性能的研究

Reaction performance of nitrogen removal adsorption from the coking wax oil with activation resin

在实验室条件下,分别以D72阳离子活化树脂和D001-CC阳离子活化树脂为吸附剂,在连续吸附固定床反应器中对焦化蜡油进行吸附脱氮研究,并用催化裂化微反装置对脱氮后的焦化蜡油进行催化裂化反应性能研究。考察两种活化树脂在固定床吸附反应器中的吸附穿透曲线、两种活化树脂对焦化蜡油中碱性氮的动态吸附特性及两种活化树脂在不同吸附温度下对焦化蜡油碱性氮脱除率的影响,比较两种活化树脂的吸附性能。脱氮前后焦化蜡油分别进行催化裂化反应,比较脱氮前后焦化蜡油催化裂化反应性能。实验结果表明:D001-CC活化树脂的最佳吸附温度为70℃,6h后吸附能力达到饱和,饱和吸附量为19.35mg/g;D72活化树脂的最佳吸附温度为60℃,5h后吸附能力达到饱和,饱和吸附量为7.75mg/g。焦化蜡油经树脂脱氮处理后催化裂化反应程度加深,转化率提高。反应温度为400℃时,未脱氮的焦化蜡油转化率为44%,经过30min吸附脱氮处理,焦化蜡油的转化率达到81.5%。在较高的反应温度下,碱性氮的含量对催化剂活性的影响更为敏感,碱性氮的含量减少幅度较大的焦化蜡油,催化裂化的转化率增加更多。

Under laboratory conditions ,nitrogen adsorption from the coking wax oil was stud-ied respectively by D72 and D001-CC cationic activation resins as adsorbents in a continuous fixed bed reactor .Micro reaction system of fluid catalytic cracking unit was used to study the catalytic cracking reaction performance of coking wax oil after denitrification .Adsorption properties of two kinds of activation resin were compared by studing the adsorption breakthrough curve in the fixed bed ,the dynamic adsorption properties of alkaline nitrogen compounds in the coking wax oil and the affect of the adsorption temperature on the removal rate of basic nitrogen compounds . Catalytic cracking performances of coking wax oil before and after denitrification were finally compared with catalytic cracking experiments .Results of experiments showed that the optimum adsorption temperature of D001-CC activation resin was 70 ℃ ,the adsorption capacity was satu-rated 6 hours later ,and the saturated adsorption capacity is 19 .35 mg/g .The optimum adsorp-tion temperature of D72 activation resin was 60 ℃ ,the adsorption capacity was saturated 5 hours later ,and the saturated adsorption capacity was 7 .75 mg/g .The degree of catalytic cracking of coking wax oil deepened and the conversion rate improved after dealing with the resin denitrifica-tion .When the reaction temperature was 400 ℃ ,the conversion rate of coking wax oil without denitrification was 44% .The conversion rate of coking wax oil reached 81 .5% after 30 minute’s adsorption denitrification treatment .The influences of alkaline nitrogen content on catalyst activ-ity were more sensitive at higher reaction temperature .The more substantially decrease of alka-line nitrogen content in the coking wax oil ,the more significantly increases of catalytic cracking conversion rates .