Control of catalytic hydrotreating selectivity with ammonia
Hydrogen consumption is a major cost during the hydrotreatment of synthetic crude liquids and low-grade fuels to reduce the concentration of heterocyclic compounds containing S, N, and O. With present technology, this consumption is much greater than the minimum stoichiometric amount required to convert these compounds to H{sub 2}S, NH{sub 3}, H{sub 2}O, and hydrocarbons. In addition in coal liquefaction it is desirable to form partially hydrogenated aromatics such as tetralin which are good hydrogen donors rather than completely saturated aromatics such as the decalins, which are a poor hydrogen donor. There are several indications in the literature that NH{sub 3} may reduce the hydrogenation rate of aromatics and alter their hydrogenation selectivity while having only a modest effect on a reaction such as hydrodenitrogenation. The goal of this work was to study the effect of ammonia on the hydrogenation of aromatic hydrocarbons during hydrotreating. Quinoline was chosen as the model heterocyclic compound. This quarter, mixtures of quinoline and butylbenzene in the presence or absence of hexadecane have now been studied and some preliminary kinetic modeling has been performed. For aid in understanding, this quarter's results are combined here with those from the last quarter on reaction of quinoline and naphthalene. 12 refs., 11 figs.
- Research Organization:
- Massachusetts Inst. of Tech., Cambridge, MA (USA). Dept. of Chemical Engineering
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- FG22-89PC89775
- OSTI ID:
- 5747728
- Report Number(s):
- DOE/PC/89775-4; ON: DE91012711
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
AMMONIA
AROMATICS
AZAARENES
AZINES
CHEMICAL REACTIONS
COAL LIQUEFACTION
CONDENSED AROMATICS
DOCUMENT TYPES
HETEROCYCLIC COMPOUNDS
HYDRIDES
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROGENATION
LIQUEFACTION
NAPHTHALENE
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PROGRESS REPORT
PYRIDINES
QUINOLINES
TETRALIN
THERMOCHEMICAL PROCESSES