NOVELTY - Exporting renewable hydrogen via offshore methylcyclohexane (MCH) platform involves forming electricity on-shore from facility powered by renewable energy; transmitting it via high voltage cable to offshore platform; accommodating on the platform desalination plant, electrolysis plant, toluene holding tank, hydrogenation plant for combining toluene and hydrogen; forming MCH on the platform and storing it in on-board holding tanks; berthing petroleum ship tankers alongside the platform; recycling toluene backwards and forwards between the offshore MCH platform and the export destinations.    USE - For exporting renewable hydrogen via an offshore methylcyclohexane (MCH) platform (claimed).    DETAILED DESCRIPTION - Exporting renewable hydrogen via an offshore methylcyclohexane (MCH) platform involves generating electricity on-shore in Australia from a facility powered by renewable energy such as wind, solar, biomass or geothermal; transmitting this renewably generated electricity via high voltage cable to an offshore platform; accommodating on such offshore platform a desalination plant, an electrolysis plant, a Toluene holding tank, a hydrogenation plant for combining Toluene and Hydrogen to produce MCH and an MCH holding tank, the power for all of which is provided by the renewably generated electricity which has been transmitted from the shore to the offshore platform; producing MCH on the offshore platform and storing it in on-board holding tanks until it is off-loaded into petroleum ship tankers which berth along side; berthing petroleum ship tankers alongside the offshore platform where such ship tankers first unload a cargo of toluene into the offshore platform's toluene holding tanks and then take on board MCH from the offshore platform's MCH holding tank which the ship tankers then transport to export markets; recycling toluene backwards and forwards between the offshore MCH platform and the export destinations, such that the toluene is acting as a Hydrogen carrier via a closed carbon loop.