|Authors||Weimar L&aacute;zaro,PETROBRAS / DOWNSTREAM &endash; REFINING, Brazil,;
Francisco Carlos da Costa Barros,
PETROBRAS / R &amp; D , Brazil,;
Cl&aacute;udio Neves Borges,
PETROBRAS / Cubat&atilde;o Refinery, Brazil
PETROBRAS, MARLIM CRUDE AND DELAYED COKING
UNITS (DCU): A PERFECT TRIO
Weimar L?zaro PETROBRAS / DOWNSTREAM ? REFINING, Brazil,
Francisco Carlos da PETROBRAS / R &D , Brazil,
Cl?udio Neves Borges PETROBRAS / Cubat?o Refinery, Brazil.
Abstract There is a direct correlation among Marlim crude, the Delayed Coking Unit and PETROBRAS, owner of
huge crude oil reserves in deep water reservoirs, from which the giant Marlim field stands out. Processing
growing volumes of crudes with such deep-water characteristics has set challenges that the Company
dealt with by fitting its refining plant facilities. These crudes generate large volumes of residues, which call
for the construction of conversion units. In this specific case, the choice for the delayed coking process has
a fundamental explanation: the process is profitable and adjustable to the fuel demands, parallel to the
production of a petroleum green coke that fits anode grade specifications. Internationally recognized coke
quality is also an indication of good operation. To complete the correlation, PETROBRAS has developed its
own delayed coking technology. A combination of basic engineering, pilot plant research and industrial
tests are the key for the present technological stage, keeping pace with the latest industrial
developments. Today, PETROBRAS operates four Delayed Coking Units ? DCU, three of which designed
internally. Three new other units have already concluded their basic design and are in EPC phase.
Introduction Campos basin reservoirs, which comprise a considerable portion of Brazilian reserves ? being
Marlim the biggest field ? are known to produce deep water, heavy, naphthenic crudes. The
research, exploration and production of this kind of deep water crude have ushered the Company
to the world leadership in this area. PETROBRAS has been adapting its refining scheme to best
exploit this crude's characteristic.
Some papers and magazines have been published by PETROBRAS, focusing either on the
geological or exploration aspects of Campos basin development. Other papers1 are focused on the
impact of processing Marlim crude in its units and how the Company has dealt with that challenge.
The growth of heavy crude production, the environmental restrictions on the burning of fuel oils
and the increasing natural gas production, led to development and building of conversion and
hydrotreatment (naphtha and diesel) units. Delayed Coking Technology (DCT) is an important
route to increase liquid yields from these heavy crudes.
The development of PETROBRAS technology both in Delayed Coking and Residue Fluid Catalytic
Cracking units began during the 1980's, when Brazil had many constraints to import, forcing it to
manage its own technological developments. Nowadays, the scenario has changed and the
Company is a strong player in the petroleum product open market.
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PETROBAS, MARLIM CRUDE AND DELAYED
COKING UNITS (DCU): A PERFECT TRIO
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