Gas oil refining

GO-flning [Gas-oil refining] A hydrodesulfurization process adapted for gas oil. The proprietary catalyst is regenerable. Developed by Esso Research Engineering Company and the Union Oil Company of California and jointly licensed by them. First commercialized at Wakayama, Japan, in 1968 by 1972, nine units had been built. 

Gas oil refining currently operates at moderate temperatures (340-360°C) and hydrogen pressures of 3.0-5.0 MPa, usually with CoMo/A1203 catalysts. These conditions are unable to achieve the 0.05% S specification of gas oil. Increasing the temperature can achieve the S goal, but the color of the produced oil becomes degraded at the elevated temperature due to unwanted side reactions. Consequently, it is necessary to understand the HDS reactivity of refractory sulfur species in the gas oil and to clarify possible inhibition mechanisms that may limit HDS reactions. The design and development of more effective HDS catalysts that will minimize the increase of the costs to the refinery are severely needed. 

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See also in sourсe #XX -- [ ]

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