Abstract

An experimental thermal plasma reactor is developed to study the direct conversion of natural gas to liquid hydrocarbons. A preliminary theoretical study of the equilibrium composition and of the reaction kinetics underlined the need to maintain the reaction mixture at temperature in the range of 1300 to 1500 K for at least one second residence time in the reactor. While the relatively long residence time required is incompatible with standard plasma reactor technology, it was achieved by the combined use of a d.c. plasma torch for the rapid heating of the reaction mixture to the required temperature, and of resistive heating elements to extend the high temperature zone throughout the one-meter long tubular reactor.

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