IsoTherming® Hydroprocessing technology

Growing global demand for transportation fuel continues to drive refiners toward operations that maximize hydroprocessing capacity and capability either through unit debottlenecks or new unit construction. More stringent environmental regulations and the processing of cost-advantaged sour and heavy feed stocks make meeting this demand even more challenging.

IsoTherming® hydroprocessing technology is a commercially proven process that provides refiners a more economical means to produce today’s transportation fuels.

The core of IsoTherming® technology, Figure 1, is the ability to provide the hydrogen necessary for the reactions using a liquid stream, rather than a recycle gas system. The reactor feed is saturated with hydrogen which eliminates the need for a recycle gas compressor. To satisfy hydrogen requirements within the reactor, additional hydrogen can be added by means of an external liquid recycle stream or inter-bed hydrogen injection.

Operating the reactor liquid-full also acts as a heat sink for the exothermic reactions. Thus, the reactor operates closer to isothermal conditions, which reduces uncontrolled cracking reactions and lowers light ends make.

Application, design objectives and hydrogen requirements dictate optimal reactor design including required number of catalyst beds and recycle ratio. With similar operating temperatures and pressures to conventional technology, IsoTherming® technology has a number of very attractive benefits to a refiner.

Applications for IsoTherming®, whether grassroots or revamp, include:
• Kerosene Hydrotreating
• Transmix Hydrotreating
• Diesel Hydrotreating
• FCC Feed Hydrotreating
• Mild Hydrocracking
• Dewaxing
• Gas-To-Liquid (GTL)

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