Gasification

Prior to the Rentech Process, the carbon-bearing feedstock is gasified (or in the case of natural or landfill gas, reformed) under high temperature to produce synthesis gas (syngas), a mixture of carbon monoxide and hydrogen (CO and H₂). In the process of producing syngas for the Rentech Process, carbon dioxide and regulated pollutants are removed and/or captured, and clean synthesis gas is available for and injected into the Rentech reactor.

A synthetic fuels and chemicals facility utilizing the Rentech Process can employ almost any commercially available gasifier to produce syngas for the production of ultra-clean synthetic fuels, specialty waxes and chemicals. In order to be used in conjunction with the Rentech reactor, a gasifier should meet the following requirements:

• H₂/CO ratio of 0.5 to 2.0+ coming from the gasifier
• Low inert content (low methane and tars, low N₂)

Rentech-SilvaGas Biomass Gasification Process

Rentech-SilvaGas Biomass Gasification Process is a patented, commercially proven, gasification technology with over $100 million invested in technology and assets. The gasifier can process a wide variety of cellulosic feedstocks to produce syngas. The syngas can be used to produce renewable power or it can be processed through our Rentech Process or other third-party fuel conversion technologies to produce drop-in, certified, renewable fuels. The gasifier had successfully operated in Burlington, VT for over 2 years in partnership with the Department of Energy (DOE), National Renewable Energy Laboratory (NREL) and Battelle Columbus Laboratory.

Rentech-ClearFuels Biomass Gasification Process

The Rentech-ClearFuels biomass gasification technology produces hydrogen as well as syngas from cellulosic feedstocks through the use of a High Efficiency Hydrothermal Reformer (HEHTR). The syngas can be used to

ClearFuels Gasification Process

produce renewable power or be processed through Rentech's technology or other third-party fuel conversion technology to produce renewable drop-in fuels. The Rentech-ClearFuels technology has operated at pilot scale in excess of 10,000 hours and multiple third parties, including Idaho National Laboratory and Hawaii Natural Energy Institute, have independently validated the results of the pilot scale data. The Rentech-ClearFuels technology will be proven at demonstration scale at Rentech's Energy Technology Center in Commerce City, CO through a $23 million grant received from the U.S. Department of Energy under the American Recovery and Reinvestment Act.