Isle of Wight gasification facility

The facility has been funded as part of Defra's New Technologies Demonstrator Programme and is one of the first and only facilities in the United Kingdom to be classed as a gasification system employed for the combustion of refuse derived fuel originating from municipal waste. The plant is operated by Waste Gas Technology UK Ltd, part of the ENER·G group, and utilises the Energos technology; Energos is also part of the ENER·G group. The Energos system was retrofitted into a small conventional incinerator plant[4] and combust an estimated 30,000 tonnes of refuse-derived fuel per year. The retrofit cost £10 million to commission, £2.7 million of which was funded by DEFRA.[5]

The plant is sited at Forest Road, Newport.

Coordinates: 50°42′18″N 1°20′06″W / 50.705°N 1.335°W The Isle of Wight gasification facility is a municipal waste treatment plant in southern England.[1] It entered the commissioning phase in autumn 2008,[2] and will be replaced by a new moving grate incinerator in 2019[3]

Temporary suspension of operation, 2010

Due to increased dioxin emission levels detected in March 2010 exceeding 8 times the legal limit,[6] operation was temporarily suspended spring 2010. The flue gas cleaning system of the old incinerator was reused in the retrofit, and ENER·G reported this system to be the cause of the problem.[7] Following modifications and several startup attempts, it has been operating again since October 2010.[8]

In June 2011, the Isle of Wight council decided to make radical efforts to lessen its dependence on the gasification facility with reference to its history of limited reliability.[9]. In 2017 it was decided to build a new grate based incinerator to replace the Energos plant by 2019.[3]

Energos technology

The Energos system includes a close coupled combustion stage which, as configured, uses all the syngas in the combustion stage. It is thus not able to produce syngas for external use and therefore sometimes categorized as two-stage combustion. The process enables improved control of the combustion to minimise the formation of combustion related emissions such as oxides of nitrogen (NOx), Carbon Monoxide (CO) and Total Organic Carbons (TOC). Operating plants achieve average annual NOx emissions of 25 – 30% of the EU limit using just process control and without the need for either Selective Non Catalytic Reduction (SNCR) or Selective Catalytic Reduction (SCR), whilst at the same time achieving very low CO and TOC emissions.

The energy in the combusted syngas is converted into steam. Energos plants produce steam at lower temperature and pressure than modern waste incinerators, and thus achieve low energy-efficiencies compared to incinerators. As a CHP or heat delivery plant, the cycle efficiency is approaching 85%. One such example is the recently constructed Sarpsborg 2 plant, which provides process steam to the Borregaard Chemical Plant, directly displacing heavy fuel oil.

The Isle of Wight plant debuts a new furnace design for the Energos process aimed at increased combustion efficiency, dust removal and enabling less interruptions and downtime than the earlier design[10]

See also


  1. ^ Construction start for Isle of Wight incineration plant,, retrieved 18.09.07]
  2. ^ Island Gasification Plant Powers Up, Article in Island Pulse, 12 November 2008
  3. ^ a b Isle of Wight drops gasification for moving bed facility, article by Letsrecycle May 31st 2017
  4. ^ Green Lane Eco Park Community Meeting 25 January 2010
  5. ^ Energy from Waste: Set to attract Investment from the Cleantech Investor website
  6. ^ Energos Isle of Wight Plant Fails Dioxin and Furan Emissions Tests from the Say no to Green Lane Incinerator web site
  7. ^ Energy Plant Suspends Waste Processing, Article in Island Pulse, 31 May 2010
  8. ^ Isle of Wight gasification plant achieves compliance,, April 1., 2011
  9. ^ Isle of Wight seeks to reduce use of 'unreliable' gasifier,, June 22., 2011
  10. ^ MSW Spells Self-Sufficiency for Isle of Wight Residents, Article in Biomass Magazine, August 2009.

External links

  • "Island to open gasification plant". BBC News. 16 May 2007. Retrieved 2009-10-14.

Gasification is a process that converts organic- or fossil fuel-based carbonaceous materials into carbon monoxide, hydrogen and carbon dioxide. This is achieved by reacting the material at high temperatures (>700 °C), without combustion, with a controlled amount of oxygen and/or steam. The resulting gas mixture is called syngas (from synthesis gas) or producer gas and is itself a fuel. The power derived from gasification and combustion of the resultant gas is considered to be a source of renewable energy if the gasified compounds were obtained from biomass.The advantage of gasification is that using the syngas (synthesis gas H2/CO) is potentially more efficient than direct combustion of the original fuel because it can be combusted at higher temperatures or even in fuel cells, so that the thermodynamic upper limit to the efficiency defined by Carnot's rule is higher or (in case of fuel cells) not applicable. Syngas may be burned directly in gas engines, used to produce methanol and hydrogen, or converted via the Fischer–Tropsch process into synthetic fuel. Gasification can also begin with material which would otherwise have been disposed of such as biodegradable waste. In addition, the high-temperature process refines out corrosive ash elements such as chloride and potassium, allowing clean gas production from otherwise problematic fuels. Gasification of fossil fuels is currently widely used on industrial scales to generate electricity.

Isle of Wight

The Isle of Wight (; also referred to informally as The Island or abbreviated to IoW) is a county and the largest and second-most populous island in England. It is in the English Channel, between 2 and 5 miles off the coast of Hampshire, separated by the Solent. The island has resorts that have been holiday destinations since Victorian times, and is known for its mild climate, coastal scenery, and verdant landscape of fields, downland and chines. The island is designated a UNESCO Biosphere Reserve.

The island has been home to the poets Swinburne and Tennyson and to Queen Victoria, who built her much-loved summer residence and final home Osborne House at East Cowes. It has a maritime and industrial tradition including boat-building, sail-making, the manufacture of flying boats, the hovercraft, and Britain's space rockets. The island hosts annual music festivals including the Isle of Wight Festival, which in 1970 was the largest rock music event ever held. It has well-conserved wildlife and some of the richest cliffs and quarries for dinosaur fossils in Europe.

The isle was owned by a Norman family until 1293 and was earlier a kingdom in its own right. In common with the Crown dependencies, the British Crown was then represented on the island by the Governor of the Isle of Wight until 1995. The island has played an important part in the defence of the ports of Southampton and Portsmouth, and been near the front-line of conflicts through the ages, including the Spanish Armada and the Battle of Britain. Rural for most of its history, its Victorian fashionability and the growing affordability of holidays led to significant urban development during the late 19th and early 20th centuries. Historically part of Hampshire, the island became a separate administrative county in 1890. It continued to share the Lord Lieutenant of Hampshire until 1974, when it was made its own ceremonial county. Apart from a shared police force, there is now no administrative link with Hampshire, although a combined local authority with Portsmouth and Southampton was considered, this is now unlikely to proceed.The quickest public transport link to the mainland is the hovercraft from Ryde to Southsea; three vehicle ferry and two catamaran services cross the Solent to Southampton, Lymington and Portsmouth.

New Technologies Demonstrator Programme

The New Technologies Demonstrator Programme is a scheme part of Defra's Waste Implementation Programme, New Technologies Workstream, to demonstrate advanced solid waste processing technologies in England. A pot of £30million was allocated to fund 10 demonstrator projects with the project being headed by Dave Brooks at Defra. The scheme is not on schedule for the ambitious targets that were initially set out by Defra, however 9 projects out of the initial 10 are now projected to be operational by April 2009, over 2 years behind schedule.

Refuse-derived fuel

Refuse-derived fuel (RDF) is a fuel produced from various types of waste such as municipal solid waste (MSW), industrial waste or commercial waste.

The World Business Council for Sustainable Development provides a definition:

“Selected waste and by-products with recoverable calorific value can be used as fuels in a cement kiln, replacing a portion of conventional fossil fuels, like coal, if they meet strict specifications. Sometimes they can only be used after pre-processing to provide ‘tailor-made’ fuels for the cement process“

RDF consists largely of combustible components of such waste, as non recyclable plastics (not including PVC), paper cardboard, labels, and other corrugated materials. These fractions are separated by different processing steps, such as screening, air classification, ballistic separation, separation of ferrous and non ferrous materials, glass, stones and other foreign materials and shredding into a uniform grain size, or also pelletized in order to produce a homogeneous material which can be used as substitute for fossil fuels in e.g. cement plants, lime plants, coal fired power plants or as reduction agent in steel furnaces. RDF can be also further specified into e.g. tyre derived fuels (TDF) from used tyres, or solid recovered fuels (SRF)

Others describe the properties, such as:

Secondary fuels

Substitute fuels

Solid recovered fuels (SRF)

“Climafuel®” as trade name from Cemex

“AF“ as an abbreviation for alternative fuels

Ultimately most of the designations are only general paraphrases for alternative fuels which are either waste-derived or biomass-derived.There is no universal exact classification or specification which is used for such materials. Even legislative authorities have not yet established any exact guidelines on the type and composition of alternative fuels. The first approaches towards classification or specification are to be found in the Federal Republic of Germany (Bundesgütegemeinschaft für Sekundärbrennstoffe) as well as at European level (European Recovered Fuel Organisation). These approaches which are initiated primarily by the producers of alternative fuels, follow a correct approach: Only through an exactly defined standardisation in the composition of such materials can both production and utilisation be uniform worldwide.

First approaches towards alternative fuel classification:

Solid recovered fuels are part of RDF in the fact that it is produced to reach a standard such as CEN/343 ANAS. A comprehensive review is now available on SRF / RDF production, quality standards and thermal recovery, including statistics on European SRF quality.

Waste in the United Kingdom

It is estimated that 290 million tonnes of waste was produced in the United Kingdom in 2008 but volumes are declining. In 2012 municipal solid waste generation was almost 30 million tonnes, according to Waste Atlas Platform.The National Waste Strategy is a policy of the government, and in particular the Department for Environment, Food and Rural Affairs (Defra), intended to foster a move to sustainability in waste management within Great Britain.

Power stations
Incineration in the United Kingdom
Under construction

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