Hydrotreating hydrogen consumption

By-products of these processes of hydrotreating are gases, H2S, and some naphtha. The hydrogen consumption is relatively high as a function of the required performance. 

Hydrotreating essentially involves no reduction in molecular size with hydrogen consumption less than about 100 cu. ft./bbl. Primary application is to remove small amounts of impurities with typical uses including naphtha and kerosene hydrosweetening. 

Excessive hydrogen consumption due to nonselective hydrogenation of aromatic hydrocarbon components in the fuels being hydrotreated... 

Figure 1. Product nitrogen vs. hydrogen consumption hydrotreating of SRC-II at 750° F (%) ICR 106 catalyst, (O) ICR 113 catalyst...

Contributions of the heavier hydrocarbons to hydrogen consumption are small for hydrotreating at conditions which cause very little cracking of hydrocarbons since most of the consumed hydrogen goes into the liquid product. 

The proposed NSPS can be met by hydrotreating the coal liquids obtained by filtering the product from the coal dissolution stage. The desulfurization kinetics can be presented by two parallel first-order rate expression, and hydrogen consumption kinetics can be presented by a first-order rate expression. A linear relationship exists between total sulfur content and SRC sulfur content of the hydrotreated product. For the Western Kentucky bituminous 9/14 coal studied here, the maximum selectivity and lowest SRC conversion to oil for a fixed SRC sulfur content are obtained using the highest reaction temperature (435°C) and the shortest reaction time 7 min.). ... 

Figure 12. Product aromatic content vs. hydrogen consumption hydrotreating whole SRC-11 oil at various severities group type calculated from GC or MS of...

The use of a non-aromatic solvent as the supercritical hydrotreating solvent was studied first with Arabian topped crude and then with Paraho shale oil in hope of reducing hydrogen consumption. The results are tabulated in Tables IV and VI. 

The feedstock consists of a mixture of C8 aromatics typically derived from catalytically reformed naphtha, hydrotreated pyrolysis gasoline oran LPG aromatization unit. The feed may contain up to 40% ethylbenzene, which is converted either to xylenes or benzene by the Isomar reactor at a high-conversion rate per pass. Feedstocks may be pure solvent extracts or fractional heartcuts containing up to 25% nonaromatics. Hydrogen may be supplied from a catalytic reforming unit or any suitable source. Chemical hydrogen consumption is minimal. 

Hydrotreating process Temperature (°C) Hydrogen partial pressure (atm) LHSV Hydrogen consumption... 

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