• Welcome to Arigna Biofuels website…

    We are adding biofuels to our list of products.

    Better for the global climate …CO2 Neutral
    Better for the local environment …Very low smoke
    Better for your pocket …No carbon tax

    We are converting wood, rushes and other biomass to a high energy, high density, and greener fuel with the same burning characteristics as our existing fossil based fuels.

  • How we will do it

    We have developed our own process based on torrefaction – roasting biomass without air.

    This removes it’s tars, creosote and other low heating value products and leaves an energy dense, black product that looks and performs like our existing products.

The Process #1

We take raw biomass and heat it to in excess of 300 degrees to dry the material, kick-starting a thermal reaction to break down the hemicellulose contained within the plant structure.

The Process #2

This in turn produces an energy rich gas which is burned to sustain the reaction with no additional heat input, known as an autothermal reaction.

The Process #3

After this the product is cooled, blended with our existing products and briquetted.

  • Why not just burn wood?

    Although wood (biomass) is a renewable and sustainable fuel there are some serious issues associated with burning wood domestically. These are well documented and researched and include the production of particulates (PM10 & PM 2.5) which contribute to air pollution and serious health issues.

    (See report here on EPA website)

  • Even well-seasoned logs contain approximately 20% moisture, so when burning these, energy and heat is lost by evaporation of water in the fire/ stove, but more importantly, torrefied biomass does not produce creosote so by burning this product you will reduce maintenance of your stove, chimney and flue.

  • Benefits

    More environmentally friendly fuel

    Higher heat output than seasoned timber, wood chips or wood pellets

    Low moisture and ash content

    No production of creosote

    Large reduction in particulates and emissions into the atmosphere

    Cleaner burning fuel – less smoke

    Sustainable – we use biomass residues

Glossary of Terms


Biomass is all biological material derived from either living or recently dead plant or animal organisms. In the context of energy production, biomass is classed as a renewable resource and usually refers to plant material.


Torrefaction is the process of heating biomass in the absence of oxygen, similar to the way that coffee is roasted. This removes chemically bound oxygen and gives a fuel with higher energy content and improved combustion properties.


Hemicellulose is a natural polymer found in biomass along with cellulose and lignin and is the compound most readily degraded by torrefaction.


Pyrolysis is the process of heating material (in our case biomass) in the absence of oxygen to make char-type products. Mild pyrolysis conditions (200 – 300°C) are used for torrefaction and higher temperatures (400-500°C) used for producing charcoal.


The torrefaction reaction is exothermic, meaning it generates heat. This heat can then be re- used in the process to dry and sustain the reaction without any other external source.


When wood is burned incompletely in a fire (i.e. when it’s wet), tarry smoke or creosote is formed and condenses on the inside of chimney flues.

PM10 and PM2.5

PM10 and PM2.5 are measurements of fine particulate matter (dust) that are present in the air we breathe. Around 10% of the total particulates in the air are made from human activity and these can have a severe effect on health. Wood smoke and smoky coal burning contributes to large amounts of particulates emitted to the atmosphere.

Further Information…


Arigna Fuels
Co. Roscommon

T: 071 9646002
F: 071 9646016
E: info@arignafuels.ie
W: www.arignafuels.ie

Arigna Fuels is a member of the International Biomass Torrefaction Council.


See www.aebiom.org for further information.

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