Shell hydrodesulfurization

J. Hydrodesulfurization unit effluent exchanger channel head and shell plate. (Hydrocarbon feed to unit and make-up hydrogen Bom ethylene unit)... 

P. Hydrodesulfurization unit hydrogen preheat exchanger shell blisters, intergranular Assuring, and decarburization in weld metal postweld heat treated at 1150°F. 

Trickle Hydrodesulfurization A process for removing sulfur-, nitrogen-, and heavy-metal-compounds from petroleum distillates before catalytic cracking. The preheated feed is hydrogenated, without a catalyst, in an adiabatic reactor at 315 to 430°C. Developed by Shell Development Company. As of 1978, 91 units had been installed. 

The Shell residual oil hydrodesulfurization process is broadly defined as a process to improve the quality of residual oils by removing sulfur, metals, and asphaltenes... 

Figure 9-29 Bunker reactor for the Shell residual oil hydrodesulfurization process.

Reactors and Catalysts. The reactor configuration consists of two reactor trains of two reactors in series each with two beds (8). Since the reactors are adiabatic, each bed temperature, except the first bed, is controlled by recycle hydrogen gas. However, as shown in Figure 1, the bed temperatures increase with reactor depth. A maximum reactor inlet temperature is set to avoid coking in the furnace coil and the first bed. A maximum reactor outlet temperature is limited by reactor shell metallurgy. The hydrodesulfurization catalyst, which occupies about 70% of a total catalyst volume, is packed in a lower half of the second bed and the whole third and fourth beds. The rest is the hydrodemetallation catalyst. We have used Orient Catalyst HOP-802 as the hydrodesulfurization catalyst, which contains about 2% Ni and 8% Mo on an alumina support. 

The role of catalysis in the petroleum industry has been equally revolutionary. Meta I-supported systems (e.g. of Topsoe and Shell) for catalytic reforming, hydrodesulfurization and hydrodenitrification, alkylation catalysts and shape selective systems (e.g. zeolites and pillared clays) for catalytic cracking (FCC) and production of gasoline from methanol (Mobil MTG) all represent significant technical and commercial achievements. 

Hydrodesulfurization of residual feedstocks with a high metals content is a commercial proposition today (J.j ) - Based on previous work of many investigators (e.g. ref. 3 through 9) Shell s major efforts were focussed on the development of a suitable catalyst, for which a better understanding of the ageing phenomena occurring in the catalyst particle was needed. 

Abbott et al.. Shell Upgrades Stock by Hydrodesulfurization, Oil Gas July 18,... 

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