Catalytic Oxidation of Coke on Aluminosilicates

Catalyst Regeneration Kinetics via Thermogravimetric Analysis

“…The activation energy reported for silica-alumina catalysts range from 126 (Hall and Rase, 1963) and 130 kJ/mol (Goldstein, 1966) to 146 (Weisz and Goodwin, 1966;Pansing, 1956;Hagerbaumer and Lee, 1947) and 168 kJ/mol (Massoth, 1967).…”

“…Some studies report burning rates as determined from fixed beds (Dart et al, 1949;Gonzales and Spencer, 1963;Hano et al, 1975) and fluidized beds (Johnson and Mayland, 1955). Others report burning rates from individual catalyst pellets (Weisz and Goodwin, 1963;1966;Massoth, 1967). The regeneration of hydrotreating catalysts has been the topic of recent studies (Ellingham and Garrett, 1984;Nalitham et al, 1985;Bogdnor and Rase, 1986;Yoshimura and Furimsky, 1986).…”

Characteristics of Bone Clear Carbon

“…Certain impurities in small amounts can strongly catalyze the reaction of carbon with oxidizing gases (Walker et al, 1959). For example, in the study of the oxidation of coke on aluminosilicates, Goldstein (1966) found that the oxidation peaks in DTA curves (TDrA) shift to lower temperatures with addition of certain cations into the coked catalysts. It is known that the bone char, in addition to 80G hydroxyapatite, contains many other cations (Table I), which might serve as catalysts in the oxidation of carbon.…”