Development Studies on Selected Conversion of Synthesis Gas from Coal to High Octane Gasoline. Monthly Report for August 1977

摘要

Micro reactor studies with developmental catalyst SG-B-3 show that pressures greater than 100 psig are necessary for high C sub 5+ gasoline selectivity. Multiple air regenerations (greater than 2) of catalyst SG-B-3 at 950 exp 0 F for 16 hr are detrimental to catalyst life. Catalyst SG-A-3, the fixed bed version of developmental fluid catalyst SGF-A-2, showed very little aging during 20 days operation in a micro reactor. Regeneration studies of SG-A-3 have been initiated. Preliminary data indicate that SG-A-3 is not regenerable in hydrogen. Fluid bed operation using catalyst SGF-B-1 in the bench-scale unit have continued. In situ air regeneration at 850 exp 0 F for two hours follow by an activation for 10 hr at 750 exp 0 F in hydrogen was previously shown to be successful. Recent findings indicate that long times or high temperature (950 exp 0 F) or regeneration under pressure are harmful with respect to catalyst life. Heat loss calculations for the fixed and fluid bench-scale units show that both performed very close to design specification with respect to control of reactor temperatures. Target product selectivities and properties from Mobil's Direct Conversion Process have been provided to ERDA Contract EF-76-C-01-2447 for use in a sensitivity study in their comparison of Mobil's Methanol to Gasoline with Conventional Fischer-Tropsch. A survey of various coal gasifiers has been made in order to define synthesis gas compositions available for conversion to gasoline. (ERA citation 03:006113)