S. N. G. (SUBSTITUTE NATURAL GAS) PROCESS USING C. O. G. (COKE-OVEN GAS) AS ITS FEEDSTOCK.

Abstract

Conversion from conventional city gas (5,000 kcal/Nm**3) to natural gas (11,000kcal/Nm**3) by Tokyo Gas Company has been 80% completed. Although COG occupies only 2% of the company's total gas sales, it was to be converted to SNG. The COG-SNG plant, the first commercial scale plant in the world, consists of purification process in which oxygen diolefin and organic sulfur compounds in the feedstock COG are eliminated and a low temperature steam reforming process in which purified COG, LPG and/or off-gas are methanized on Ni-based catalyst.