CATEGORY: HEAVY CRUDE
Ind. Eng. Chem. Res., 2014, 53 (14), pp
5718–5727, DOI: 10.1021/ie403867d
Synergistic
Process for High Nitrogen Content Feedstocks Catalytic Cracking: A Case Study of Controlling the
Reactions of Nitrogen Compounds in Situ
Jinhong Zhang , Honghong Shan , Xiaobo Chen *,
Wenjing Liu , and Chaohe Yang *
State Key Laboratory of Heavy Oil Processing, China University of Petroleum,
Qingdao, 266580 Shandong, People’s Republic of China
yangch@upc.edu.cn
chenxiaobo@upc.edu.cn
Abstract
There
is a growing need to process heavier feedstocks with increased nitrogen content
for fluid catalytic cracking (FCC) units. Addressing this issue, researchers
catalytically cracked a coker gas oil with high nitrogen content in a
pilot-scale riser FCC apparatus under varying conditions based on a variety of
FCC processes.
They then calculated the nitrogen balance
and the conversion of saturates, aromatics, resins, and asphaltenes (SARA).
They analyzed the acid amounts of coked catalysts by the NH3-TPD
method. Results revealed that in the synergistic process the adsorption of
nitrogen-containing species on the catalyst was controlled and more acid sites
were available. Consequently, more nitrogen-free hydrocarbons, mainly the
saturates, could be cracked, while the nitrogen compounds were enriched in the
cracked heavy oil.
Full Text Source (Subscription or Fee): http://pubs.acs.org/doi/abs/10.1021/ie403867d
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