RTP for Biomass Conversion


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Envergent RTP Process Basics

Convert forest waste to renewable fuels

RTP technology is a fast thermal process in which biomass, usually forest residuals or agricultural by-products, is rapidly heated to approximately 500°C in the absence of oxygen.

A circulating transported fluidized bed reactor system, similar to the one used in the UOP Fluid Catalytic Cracking (FCC) technology, is at the heart of the process. A tornado of hot sand vaporizes the biomass, which is then rapidly quenched, typically yielding 65wt% to 75wt% RTP green fuel.

RTP technology offers exceptional versatility

  • Minimal utility and infrastructure requirements – ideal for remote or existing facilities
  • Handles a wide range of feedstocks – forestry and agricultural residuals, lignin material from the pulp and paper industry, post-consumer, wood-based construction and demolition materials as well as sustainable energy crops such as miscanthus and switch grass
  • Compact, modular construction can reduce the total installed cost and shorten the delivery schedule
  • RTP green fuel is storable, transportable, efficient and available on-demand

RTP is the only commercial scale pyrolysis technology available today to produce liquid renewable fuel for heat, power and transportation fuels.

A clean-burning, sustainable cost-effective fuel oil substitute

With virtually no sulfur, RTP green fuel is produced in a nearly carbon-neutral method, helping companies reduce their carbon footprint. This pourable, liquid fuel can be adapted for use in most energy-intensive heavy industries, including electrical generation, industrial heat, forestry, refining, petrochemicals, and pulp and paper. It also can be upgraded further to produce transportation fuels.

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RTP technology also produces char and a non-condensable gas, both of which can be used to provide process energy in the reheater to maintain the RTP process and/or in the dryer to condition the biomass. This makes the RTP process virtually self-sustaining.

Rapid Thermal Processing quickly converts relatively low-value feedstock into high-value liquid biofuel delivering up to 8,680 Btu per pound.

Biomass Material Yield (wt%) Gross Caloric Value (MJ/kg) Higher Heating Value (Btu/lb)
Hardwood 70-75 17.2 – 19.1 7,400 – 8,000
Softwood 70-80 17.0 – 18.6 7,300 – 8,000
Hardwood Bark 60-65 16.7 – 20.2 7,180 – 8,680
Softwood Bark 55-65 16.7 – 19.8 7,180 – 8,500
Corn Fiber 65-75 17.6 – 20.2 7,570 – 8,680
Bagasse 70-75 18.9 – 19.1 8,100 – 8,200