Showing papers on "Substitute natural gas published in 1997"

Large-scale production of alternative synthetic fuels from natural gas

Abstract: Publisher Summary This chapter discusses large-scale production of alternative synthetic fuels from natural gas. Production of alternative liquid fuel from natural gas is an important option for the exploitation of remote gas fields. The products can be fuel methanol, synthetic gasoline and diesel fuel, and substitute fuels such as dimethyl ether (DME). The most important technologies for manufacture of synthesis gas are various versions of steam reforming, that is, reaction of natural gas with steam alone or steam and oxygen. The technologies most relevant for large-scale manufacture of synthesis gas from natural gas include (1) adiabatic pre-reforming; (2) tubular, fired reforming; (3) autothermal reforming; and (4) oxygen-fired secondary reforming. The chapter also discusses large-scale manufacture of DME—the new alternative diesel fuel—from natural gas. The description covers the synthesis gas preparation, the product synthesis and purification, and the overall process economics. The chapter also presents a description of the properties of DME as a diesel fuel.

Production of substitute natural gas

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing substitute natural gas(SNG), capable of addressing or reducing the problems involved in carbon dioxide separation by PSA method while making the best use of the advantages of the method. SOLUTION: A methane-rich gas is recovered by PSA method designed to adsorb and separate the carbon dioxide in a mixed gas comprising methane, carbon dioxide, carbon monoxide and hydrogen through repeated adsorption/ desorption. In this method for producing the objective SNG, the reducing pressure in desorbing the methane-rich gas is controlled according to the operation load [specifically, the final reducing pressure in the above desorption is controlled within the range between -0.2 and -1.0kg/cm (G)] so that the carbon dioxide concentration in the methane-rich gas after separated.

Catalytic material for production of sng and production of sng

Abstract: PROBLEM TO BE SOLVED: To produce SNG(substitute natural gas) from gas contg. CO2 or CO together with a reducing gas through simple processes by using a catalytic material obtd. by depositing Pd and Rh on a metal oxide. SOLUTION: When a catalyst for production of SNG is synthesized, rhodium chloride trihydrate and palladium chloride are dissolved in water and a metal oxide such as alumina as a carrier is put in the resultant soln. This soln. is heated and metal ions are impregnated into the metal oxide. The resultant Pd and Rh ion-impregnated alumina is heated in a flow of reducing gas to reduce the metal ions to the metals, and Pd-Rh/Al2 O3 as the desired catalyst is obtd. At the time of producing SNG, hydrocarbon 1 is desulfurized in a hydrodesulfurizing process 2, process steam 3 is added and hot reformed gas contg. CO2 , CO and H2 is obtd. through a low temp. steam reforming process 4 and a high temp. steam reforming process 5.