Liquefaction, coal Pittsburgh Energy Technology

SOURCE Ftoc. Coal Liquefaction and Gas Conversion Contractors Review Conf, CONF-9508133, Pittsburgh Energy Technology Center, Pittsburgh, Pa., 1995. 

A question of considerable interest in coal hydroliquefaction chemistry is the amount and nature of "organically bound metals in the coal. One reason for this interest is the observation that when supported metal direct conversion catalysts are used in liquefaction reactors, a primary mode of deactivation is metals deposition Q, 2). In particular, recent work at the Pittsburgh Energy Technology Center (PETC) (4,5) and elsewhere (3) has indicated very high levels of titanium deposition on supported Co Mo catalysts used in the fixed bed continuous reactor system. It has been suggested that the culprits in such deposition are soluble metal species (6 9) The analyses of a Western Kentucky (Homestead) hvBb feed coal and of material deposited between the catalyst pellets in the fixed bed reactor at PETC (4) are shown in Table I. 

Product oils from direct liquefaction of Blacksville Number 2 coal in the 1000 pound per day pilot plant at Pittsburgh Energy Technology Center (PETC) were examined by cyclicvoltammetry. 

This paper draws on the substantial literature concerning the metal sulfides (2,3), particularly that which concerns the relative stabilities of the various iron-sulfur and iron-oxygen forms. The intention is to build a framework within which to organize the current stock of observations concerning liquefaction residues from coal liquefaction experiments at the Pittsburgh Energy Technology Center. The presentation will display the experimental results, provide a framework for their interpretation and deal with the... 

Ireland Mine hvAb coal was used in the coal pyrolysis studies. The method of heat treatment was essentially that reported by Petrakis and Grandy (8), Ireland Mine coal was also the feed coal used to obtain most of the coal liquefaction products. The coal-derived liquids investigated were centrifuged liquid products (CLP) and their subfractions from selected runs in the Pittsburgh Energy Technology Center s 400-lb coal/day coal liquefaction process development unit (PDU) (9). 

MacArthur, J.B. 1993. Evolution of HRI S eoal liquefaction technologies. In Annual International Pittsburgh Coal Conference, University of Pittsburgh School of Engineering Centre of Energy. 

---