Industrial process (VREC) for the thermal catalytic desulfurization of high sulfur content petroleum green cokes to electrode grade coke

Conference · Sun Mar 01 04:00:00 EST 1981 · Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States)

OSTI ID:6555883

Reis, T

Delayed (or fluid) coking can be considered as an economical and convenient desulfurization process for high sulfur content heavy residues, provided that a suitable process exists to remove sulfur from the green coke, down to 1.5 to 1.0 wt % and to obtain real densities above 2.04 g/c.c. Such a process has now been industrialized (VREC process) and its technical and economical implications in desulfurization of residues from delayed (fluid) coking as well as newer developments of the VREC process, are described in this paper. The main advantages of the VREC process are: (1) it uses a thermocatalytic reaction no other process uses; (2) it uses a well known rotary hearth kiln technology but has considerably improved this type of kiln; (3) it uses new and particularly efficient patented continuous control methods enabling the automatic control and regulation of sulfur content and real density of the coke during the thermocatalytic calcination and desulfurization. Disadvantages seem to be: (1) the use of recycle gas (volatile hydrocarbons) means coke dust must be separated, filtered and, presumably, relatively poor yield based on fixed carbon; (2) the vertical retorts are in graphite; (3) the gases contain H/sub 2/S, COS, CS/sub 2/, which must be purified by caustic scrubbing. They also contain tarry and waxy matter and it seems doubtful that the sulfur free spill gas and the recovered hydrocarbon liquids can be effectively credited as stated; and (4) the economics of $70 to 75/T of estimated operating costs exclusive of return on investment and federal taxes don't seem very challenging.

• Research Organization: Sogepec/Petrole, Paris, France
• OSTI ID: 6555883
• Report Number(s): CONF-810308-(Vol.2)
• Conference Information: Journal Name: Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States) Journal Volume: 26:2
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
CARBONIZATION
CATALYTIC CRACKING
CHEMICAL REACTIONS
COKE
COKING
COST
CRACKING
DEASPHALTING
DECOMPOSITION
DESIGN
DESULFURIZATION
ECONOMICS
ENERGY SOURCES
EQUIPMENT
EXTRACTION
FOSSIL FUELS
FUELS
MARKET
OPERATING COST
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM RESIDUES
PYROLYSIS
SEPARATION PROCESSES
THERMAL CRACKING
THERMOCHEMICAL PROCESSES