Regenerating Waste Plastic into Electricity and Hydrogen with DMG® Energy Recovery Technology

DMG® technology offers many benefits to owners, operators and communities, as well as to the wider environment.

The primary cost benefits for installing DMG® technology are:

  • Low Cost Waste Destruction and Regeneration
  • Low Cost Electricity
  • Low Cost Hydrogen
  • Low Cost Heat

The advantages of the DMG® technology include:

  • An alternative to landfill for challenging waste streams
  • Potential reduced waste sorting and cleaning costs vs other EfW processes.
  • Can process any mix of polymers
  • Feedstock can be wet, with organics
  • The CV range is less significant to DMG® operation and efficiency than to other EfW processes
  • The DMG® syngas can be used for industrial applications and chemical precursors

We offer testing, analytical and trialing services to potential customers to understand the energy recoverable from differing feedstocks.

Please contact us to help us understand your challenging waste streams and how DMG® technology may be applied to help your waste management and energy needs.

DMG® – How It Works

The majority of plastics do not get recycled for many reasons: they are too expensive to collect, clean, sort and separate, they have little recyclable value, or there simply aren’t enough recycling plants. These unrecyclable and unrecycled plastics are wasted through being buried in the ground in landfill or are fed into an incineration plant, from which only minimal inherent energy is recovered.

DMG® is a new type of Chemical Recycling, a form of Advanced Conversion Technology that takes these wasted plastics and recovers the maximum amount of calorific value (energy) through its innovative approach to waste management.

Firstly the plastics are broken up and shredded in to similar size pieces to allow feeding into the DMG® Thermal Conversion Chamber … which is where the transformation from waste into clean energy happens.

The process involves the plastic being heated to a very high temperature where within a few seconds it melts and is vaporised into gases. Further heating within the Chamber reforms the molecules into a synthetic gas known as “syngas”, comprising a mixture of largely methane, hydrogen and a smaller volume of carbon monoxide. The Thermal Conversion Chamber operates without oxygen, so there is no burning, however a non-combusting oxidising agent in the form of steam is added to control the process and the quality of the syngas. Once through the Conversion Chamber the syngas is cleaned, leaving behind a few inert harmless residues, which are typically less than 5% of the starting volume of waste plastics. These residues can then be reused for other purposes or safely disposed of.

The resulting gas produced is similar in calorific value to the Natural Gas used as the fuel for cooking and heating homes and businesses across the country.

A small portion of this syngas produced is used to provide the heat required to run the Thermal Conversion Chamber, making the whole process self-sustaining once its running; a small amount of natural gas being required to start it.

Another by product is heat, which can be captured and made available for export as a saleable product to neighbouring industries for heating or cooling their processes.

The energy rich syngas is then further processed to generate electricity and hydrogen.

Electricity is generated by passing the syngas through a series of engines that export electrical power for local distribution via a private electricity grid or to the national grid for homes and businesses. The engines are traditional design with modern exhaust clean up equipment to minimise emissions to the environment.

In addition to the electricity generated the syngas can also be passed through an optional hydrogen extraction module which separates out road fuel quality hydrogen (99.999% pure) for use in Hydrogen Fuel Cell Electric Vehicles.

This community source of hydrogen could be used as a clean and low-cost fuel for buses, Heavy Good Vehicles (HGVs) and cars, helping to reduce air pollution and improve air quality on our roads.

Hydrogen Fuel Cell Electric Vehicles typically only take 5 minutes to refuel and can travel over 300 miles on a single tank, longer than vehicles solely powered by batteries, whilst only producing small amounts of harmless water as exhaust.

The DMG® process can also be used to recover energy from other highly calorific value waste streams such as end of life tyres, which has been found to give excellent energy recovery results.

The name “DMG” comes from “Distributed Modular Generation” which describes the nature of the technology that can be deployed at community level providing waste management and energy generation services for local use.

In terms of the energy produced a standard size plant using the DMG® technology can regenerate 25 tonnes of waste plastic each day (approximately an articulated lorry load) and produce an output of 58MWh of electricity, enough to power over 4,000 homes for 24 hours, and 1 tonne of hydrogen, enough to fuel 30 HGVs to run for 200 miles every day.

The theoretical basis behind DMG® technology is nothing new, some its components have been around for over 100 years, but PowerHouse Energy have developed a highly innovative proprietary method of applying this technology to address two of society’s most pressing problems – the eradication of unrecyclable plastic waste and production of clean energy.