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Liquid Fuel

Process description

The TPT ® process (TPT = Thermal - Physical - Transformation) is based on the gasification of biowaste by heating without oxygen. The process works in a single step. From gas direct into the condensation into a oel/water mixture. The input material is dried and ground into powder. It can be purchased in ready-per silo or as raw material, in which case a treatment section is necessary. The Input material is buffered in commercial silo storages.

Main part of the system is a reactor at the supply organic substance the process of petroleum formation replicates (thermal direct liquefaction). Upon entering the biomass in a hot oil bath, the residual biomass is gasified in a very short time. The existing carbon and hydrogen molecules are converted into carbon-hydrogen chains and condense in the course of the system to high-quality, synthetic diesel. Through subsequent dehydration of diesel corresponds qualitatively to a mineral diesel and can drive in any conventional diesel engine. Or can be mixed with normally Diesel with DIN / EN equivalent to 590 (comparable Shell V-Power).


2 By-Products
3 Schematic representation
4 Legal bases in Europe

Mass balance

The result of 1000 kg of biomass (straw, waste of biomass, wood etc.)

  • synthetic diesel ca. 30 - 35 % = ca. 400 Liter (0,820…0,845 kg/l)
  • water ca. 20 - 25 %
  • gas ca. 15 - 25 %
  • bio-coal ca. 12 - 18 %
  • ash ca. 3 - 6 %

a technical continuous operation was audited by a 100 hour DEKRA-certificate.


After cleaning the organic carbon of contact oil the coal is suitable as fuel with a sales prices around 200 €/t.

Schematic representation

The production processes is complete CO2-neutral. That means that only the already in the biomass bound CO2 is released again. The contact oil is continuously circulated through a reactor. Over the pumping system, and a filter unit, the oil is cleaned and get free of dirt.


Figure 1: Scheme of the TPT-process, Source: TPT-Technology GmbH

Biomass entry: By a dual extruder system, the biomass in the form of powder is put into the hot oil. This is the place of the conversion reaction.

Diesel Gas Range: The diesel gas is cooled via two exchangers. In the first exchanger, the viscosity is adjusted by a heavy-boiling system. In the second exchanger then produces a diesel-water fraction.

Energy supply: The power supply of the system runs self-sufficient. The excess gas, which can not be liquefy on cooling, drives in a generator. It produce the power for the plant and the waste-head for the process heating or pre-drying of the input material.

Centrifuge: A commercially available centrifuge separates the water from the Diesel

Filter units and decanter: Various filter units and decanters separate the diesel oil from residues and waste particles.

Figure 2: Picture of the production, Source: TPT-Technology GmbH

The following materials were converted successfully or are technically possible:

  • wood or wood waste, leaves
  • straw, stalks, rice straw or corn stalks
  • reed, canola, soy, sugar cane stalks or bamboo
  • banana plants or palm leaves
  • marc of juice and wine production
  • nutshells or else shells

Other biological waste

  • digestive from biogas plants
  • sewage sludge

Legal bases in Europe

Since Jan. 2007, the petroleum industry obliged to make an increasing share of biofuels in the marketing of the Biofuel Quota Act (german: BioKraftQuG). The percentage is determined by the quota system. Biofuels within the quota be subject to the standard rate. The minimum percentage can be provided by blending with gasoline and diesel fuel, or by make and sell pure biofuel. From 2015, the conversion of the energy biofuel quota change into a climate ratio quota to reduce greenhouse gas (GHG emissions) by used biofuels. Defined in the new quota obligation on the oil economy (European rule: BImSchG §37a etc.).

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Biological Treatment

Created by Knuth Nolting (R+S Biotec GmbH), (), last modified by ()


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