in Nigeria, which uses Sasol technology. PetroSA, South Africa's national oil company, owns and operates a 22,000 barrels/day (capacity) GTL plant in Mossel Bay, using Sasol GTL technology. Aspirational and emerging ventures New generation of GTL technology is being pursued for the conversion of unconventional, remote and problem gas into valuable liquid fuels. GTL plants based on innovative Fischer–Tropsch catalysts have been built by INFRA Technology. Other mainly U.S. companies include Velocys, ENVIA Energy, Waste Management, NRG Energy, ThyssenKrupp Industrial Solutions, Liberty GTL, Petrobras, Greenway Innovative Energy, Primus Green Energy, Compact GTL, and Petronas. Several of these processes have proven themselves with demonstration flights using their jet fuels. Another proposed solution to stranded gas involves use of novel FPSO for offshore conversion of gas to liquids such as methanol, diesel, petrol, synthetic crude, and naphtha. Economics of GTL GTL using natural gas is more economical when there is wide gap between the prevailing natural gas price and crude oil price on a Barrel of oil equivalent (BOE) basis. A coefficient of 0.1724 results in full oil parity. GTL is a mechanism to bring down the diesel/gasoline/crude oil international prices at par with the natural gas price in an expanding global natural gas production at cheaper than crude oil price. When natural gas is converted in to GTL, the liquid products are easier to export at cheaper price rather than converting in to LNG and further conversion to liquid products in an importing country. However, GTL fuels are much more expensive to produce than conventional fuels. See also Biomass to liquid Carbon-neutral fuel Coal to liquid Bibliography Boogaard, P. J., Carrillo, J. C., Roberts, L. G., & Whale, G. F. (2017) Toxicological and ecotoxicological properties of gas-to-liquid (GTL) products. 1. Mammalian toxicology. Critical reviews in toxicology, 47(2), 121-144. References Natural gas technology Synthetic fuel technologies Industrial gases