Quadrise Fuels International plc, together with its subsidiaries, manufactures, markets, and sells emulsion fuels for use in power generation plants, industrial and upstream oil applications, and marine diesel engines in the United Kingdom. It produces oil-in-water emulsion-based fuels through its Multiphase Superfine Atomised Residue (MSAR) technology as a substitute for conventional heavy fuel oil; and oil-in-water emulsified synthetic biofuels through its bioMSAR technology as a substitute for biofuel. The company is based in London, the United Kingdom.