초록 ▼

In the conversion of coal to gaseous and liquid products, the heat value of the coal is more completely retained by the products through the selective high efficiency conversion of coal to a low ratio syngas utilizing a portion of the Fischer-Tropsch generated heat recovered as steam, conversion of

In the conversion of coal to gaseous and liquid products, the heat value of the coal is more completely retained by the products through the selective high efficiency conversion of coal to a low ratio syngas utilizing a portion of the Fischer-Tropsch generated heat recovered as steam, conversion of the low ratio syngas with a water gas shift F-T catalyst to a product comprising C1 to C50 hydrocarbons and oxygenates, converting the F-T product to premium gas and increased liquid fuels comprising gasoline and distillate with a special zeolite catalyst and recovering the SNG and LPG products of the selective steps to provide an improved product slate. A portion of the produced fuel gas is used in lieu of coal to provide some of the heat energy requirements of the combination process.

대표청구항 ▼

In a processing combination comprising the steps of coal gasification to produce H2 and CO, F-T hydrocarbon synthesis from said H2 and CO and upgrading the product of F-T synthesis to produce more desirable gaseous hydrocarbon products, gasoline and distillate material wherein said coal gasification

In a processing combination comprising the steps of coal gasification to produce H2 and CO, F-T hydrocarbon synthesis from said H2 and CO and upgrading the product of F-T synthesis to produce more desirable gaseous hydrocarbon products, gasoline and distillate material wherein said coal gasification is carried out in a gasifier characterized by: (1) being capable of producing syngas with less than 30 lbs. of steam per MSCF of syngas, (2) producing a low ratio syngas with a H2/CO ratio of 0.4 to 1, and (3) a gasifier exit gas temperature of less than 2000°F., the improvement which comprises: charging said low ratio H2/CO syngas to an F-T syngas conversion zone comprising a catalyst providing water gas shift and CO reducing characteristics in a single or a combination of catalyst particles in direct contact with a suspending liquid medium providing temperature control of the exothermic syngas conversion reaction about the particle of catalyst, recovering heat from said F-T syngas conversion zone in the form of medium pressure steam and utilizing said steam in said coal gasifier or its associated oxygen generation plant; recovering a product of said Fischer-Tropsch syngas conversion comprising hydrocarbon in a range of C1 to C50 hydrocarbons and oxygenates, and converting hydrocarbons and oxygenates recovered from said F-T operation with a special crystalline zeolite catalyst providing a constraint index in the range of 1 to 12, a silica to alumina ratio of at least 12 and a dried crystal density of not less than about 1.6 grams per cubic centimeter to premium products comprising gaseous LPG products, gasoline and distillate material.