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Research Of Hydrocracking Catalyst For NiO-WO3/USY Maximum Middle Distillate Production

Posted on:2009-11-09Degree:MasterType:Thesis
Country:ChinaCandidate:B Q DaiFull Text:PDF
GTID:2121360248453712Subject:Chemical Engineering
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The technology of the hydrocracking is one of the main way to process heavy oil to light oil.It is the only way of producing cleanness fuel for automobile and high quality chemical raw material while hydrocracking the feeds.It is the most efficient way to utilize crude oil.It has extensive adaptability to many feeds,it can produce many products with high quality,and the yield of liquid is high, so this technology is becoming of one link between the refinery and the chemical plant.The refineries and the research institutes pay more attention on it. Hydrocracking catalyst is the core of the technology,one of the most important way is to research out a kind of catalyst with high active and selectivity to Middle Distillate.It is important to set up a balance between the selectivity of middle distillate and the activity. It is a good catalyst which has high selectivity to Middle Distillate,and has high activity at the same time. Now Hydrocracking catalyst is developing quickly by treating the molecular sieve,optimizing the produsing technology of the catalyst , improving the disperse of the hydrogenation and using many kinds of new catalysis materials.Novel hydrocracking catalyst was developed for producing more middle distillate with two reactors in series process. Evaluation of catalytic performance of the hydrocracking catalyst was carried on a 200mL fixed-bed hydrogenation unit, the results showed that under the 75% conversion of >350℃feedstock distillate, C5+ liquid yield of the hydrocracking product can reach more than 98.2m%, 138~370℃diesel oil yield of hydrocracking product was 67.84m%, selectivity of middle distillate was 80.2%, the catalyst can meet the need of producing more middle distillate in the industrial unit, catalytic performance of the catalyst was better than reference catalyst.
Keywords/Search Tags:Catalyst, Hydrocracking, Middle Distillate, selectivity of middle distillate
PDF Full Text Request
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