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Fuelling industry and mitigating climate change

At WKE, we have made it our mission to develop a waste-derived alternative fuel that stands up to the challenges faced by heavy industry, including cement, power, steel and brick.

Used as part of your carbon-reduction journey or in place of conventional fuel altogether, solid improved recovered fuel (SIRF) pellets can help heavy industries boost their ESG profiles and make the world a greener place.

“Our goal is to produce a quality, stable and compliant fuel which will enable our customers to enhance their ESG scores with a cleaner energy at a lower cost.” – Ian Jones – CEO


About us


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SIRF pellets have a significantly lower cost per gigajoule of energy, and the raw material is sourced locally.

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SIRF pellets offer stability in terms of specification and price, and benefits for companies reporting on ESG scores.

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Gate fees for SRF could peter out. SIRF pellets offer a more consistent and ecological solution.

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As a substitute for natural gas in brickmaking, there are significant pollution-reducing benefits to using SIRF pellets.

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SIRF pellets provide a stable and consistent feedstock, improving the reliability and predictability of gasification operations.


WKE update June 2023

From a commercial aspect the interest we’ve got in our product means that for 2024 we could secure our entire volume for the year, profitability.

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WKE update April 2023 SIRF pellets leaving the dock!

we’ve been shortlisted for an award! We’re up for best Sustainable Alternative Fuels Progress award at the Awards for Excellence 2023.

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Progress at our pelleting plant in Middlesbrough continues at pace.

Lines one and two are now commissioning and producing pellets with line three expected to be commissioned in the coming months.

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CEO update

Progress continues unabated at our plant in Middlesbrough as we approach Q2 in 2023. Line One hot commissioning is advancing, with Line Two due to start at the beginning of March.

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SIRF pellet benefits at a glance

  • SIRF pellet production: 108kg CO2 per tonne
  • Coal (electricity): 2,223kg CO2 per tonne
  • Coking coal: 3,222kg CO2 per tonne
  • Wood pellet production including transportation from the USA:123kg CO² per tonne
  • Calorific Value: 19 to 21
  • Ash content: 11% to 16%
  • Biomass content: greater than 50%
  • Chlorine: 0.5% – 0.9%

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By using biomass such as fibre, packaging and mixed wood materials from Commercial & Industrial (C&I) and Construction & Demolition (C&D) waste streams, as well as non-recyclable, low-chlorine-content plastics, we are able to produce a fuel that offers significant advantages in terms of both energy costs and environmental impact compared with traditional alternatives. By pelleting this material, we are able to make a fuel that can be transported easily and cost effectively for use in place of traditional solid fuels with little or no modification required to existing plants.

The pellets are produced from waste that is not physically or economically possible to recycle. Transforming and repurposing this material into fuel pellets stops this material going into landfill and provides end users with a high calorific value, low moisture and significantly reduced CO2 alternative to conventional fuels.