RE-LOOK IN TO UPGRADING OF DIESEL FUELS BY AROMATICS SATURATION
IR@IIP: CSIR-Indian Institute of Petroleum, Dehradun
View Archive Info| Field | Value | |
| Creator |
Nanoti,S.M
Saxena,A.K Khanna,M.K Prasad,Guru Paul,Dharam Nautiyal,B.R Ganguly,S.K Garg,M.O |
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| Date |
2010-05-17T10:42:27Z
2010-05-17T10:42:27Z 2010-05-17T10:42:27Z |
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| Identifier |
reelook SMN 2003
http://hdl.handle.net/123456789/574 |
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| Description |
Increasing environmental awareness is compelling the statutory bodies to make the fuel specifications more
and more stringent. Meeting these dynamic specifications, particularly with respect to aromatics and sulphur,
is one of the major challenges faced by the refiners. Although at present no well defined regulations about
aromatics content in diesel fuel exists in European and Indian specifications, their presence is indirectly
regulated by Cetane index, Cetane number and PAH specifications. For meeting these specifications the
current trend is to use hydro processing technologies for desulphurisation and dearomatisation. Amongst
these two, it is well established that reducing the aromatics through hydrogenation is a much tougher job than
hydrodesulphurization as it requires high pressure operation and high hydrogen consumption particularly for
high aromatic feed stocks. This not only results in increasing the capital and operating cost but also leads to
formation of more Green House gases. Thus to meet future fuel specifications, significant capital
investments are needed. On the contrary refinery margins are going down day by day posing a real
challenge. In particular, small and medium size petroleum refiners will have to confront the need for a
hydrogen plant, hydro treating unit, and a sulphur plant. In view of these reasons, attempts are being made
world wide to evaluate alternative options to hydro processing technologies. Commercial processes by using
other options e.g. adsorption, oxidation followed by extraction are already available to produce ultra low
sulphur ( S< 50 ppm) middle distillates however, no such options are available for de-aromatisation.
Indian Institute of Petroleum (IIP) has recently developed NMP extraction process for the dearomatisation of
middle distillates. This process uses novel re-extraction route instead of conventional energy intensive
distillation route for the recovery of hydrocarbons. The advantages of this technology over hydro treatment
are requirement of low capital costs and production of valuable aromatic extract as by product. Experimental
data were generated with model hydrocarbons and actual feedstock for extraction and re-extraction steps.
UNIFAC group contribution approach was used to predict the LLE data and simulate continuous extraction
runs. Process flow sheet was conceptualized and simulated on ASPEN PLUS simulator and utilities were
estimated for optimum operating conditions.
This paper presents the details of various steps involved in the technology development for de-aromatisation
of middle distillate through re-extraction. Case studies comparing the preliminary economics of hydro dearomatisation
vis a vis NMP extraction technology for up-gradation of middle distillates are also presented.
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| Language |
en_US
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| Subject |
AROMATICS SATURATION
DIESEL FUELS |
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| Title |
RE-LOOK IN TO UPGRADING OF DIESEL FUELS BY AROMATICS SATURATION
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| Type |
Article
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