Retrofit and optimisation for a vacuum gas oil hydrotreating system based on exergy load distribution analysis
by Xiaoqiang Liang; Yongzhong Liu; Lixia Kang
International Journal of Exergy (IJEX), Vol. 21, No. 4, 2016

Abstract: The energy-intensive hydrotreating processes, which operate at high pressure and high temperature, are widely adopted in refineries to improve the quality of oil products. In this paper, the energy and emission performance of a vacuum gas oil hydrotreating unit is investigated by the exergy load distribution analysis incorporated with process simulations. The quantitative relationship among the exergy loads, exergy efficiencies of the subsystems and the exergy efficiency of the entire system is obtained. Two operational optimisation strategies and one retrofit scheme for the entire system are proposed by adjusting the exergy loads and exergy efficiencies of the subsystems. Results show that the exergy efficiency of the entire system increases by 1.23% through the proposed operational optimisation strategies, and the CO₂ emission of the entire system can be reduced by 56.45% through the proposed retrofit scheme.

Online publication date: Mon, 31-Oct-2016

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Exergy (IJEX):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com