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Reducing Methane Emissions to Protect the Environment

The collapse of civilisation and the natural world is on the horizon, Sir David Attenborough has told the UN climate change summit in Poland.

The naturalist was chosen to represent the world’s people in addressing delegates of almost 200 nations who are in Katowice to negotiate how to turn pledges made in the 2015 Paris climate deal into reality.

Recent studies show the 20 warmest years on record have been in the past 22 years, and the top four in the past four years. Climate action must be increased fivefold to limit warming to the 1.5C scientists advise, according to the UN.

Certainly, something important to bear in mind when selecting biogas upgrading technologies. As the world’s environmental agencies seek to crack down on avoidable GHG and methane emissions in future, and where sustainability criteria are key to securing incentives such as the Renewable Heat Incentive.

For example, a biogas upgrading plant with 98% methane recovery will ‘slip’ 2% of the methane in the raw biogas to atmosphere. A plant operating 8,500 hours per year, processing 2,000Nm3/h of biogas with 55% methane content, will slip 22Nm3/h of that methane to the atmosphere.
That is 187,000 Nm3 of methane per year. The equivalent of over 179,000 tons of CO2 emissions. Never mind the significant loss of revenue from the renewable natural gas sales!

The problem is, that while methane doesn’t stay as long in the atmosphere as carbon dioxide, it’s initially far more devastating to the climate because of how effectively it absorbs heat. In the first two decades after its release, methane is 84 times more potent than carbon dioxide.

Technologies are available with a methane slip of only 0.1%. It’s extremely important therefore to carefully consider the technology choice when factoring in the revenues, Sustainability Criteria and environmental impact of a given biomethane project.

Join Steven Scott at the ADBioresources National conference next week to find out more.

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Puregas Solutions deliver several options for treating biogas, ranging from upgrading to biomethane (Renewable Natural Gas) for grid injection, compression for bioCNG, to liquefaction for bioLNG and fuelling infrastructure.

Puregas Solutions is a Swedish based company recently acquired by Wärtsilä, delivering highly efficient biogas upgrading solutions. A Global market leader, Puregas has subsidiaries in the UK, Denmark, Germany and the USA.

With over 20 years of experience Puregas Solutions manufactures and supplies Biogas Upgrading Plants. The unique CApure upgrading process recovers over 99.9% of the available methane from the raw biogas, maximising biomethane / Renewable Natural Gas yields and revenues with exceptionally low operational costs. Puregas provides fully integrated solutions for biogas upgrading and have over 30 plants already operating.

The CApure process recovers over 99.9% of the biomethane present in the raw biogas by separating the CO2 from the biogas through a process of chemical adsorption. The selective organic solvents used in this process are so efficient that the product gas can contain over 99% biomethane. The biomethane can be directly injected in to the gas grid, compressed to produce bioCNG or liquefied for bioLNG. It’s also possible to capture the CO2 from the plant and use this for commercial purposes.
Wärtsilä is a global leader in smart technologies and complete lifecycle solutions for the marine and energy markets. By emphasising sustainable innovation, total efficiency and data analytics, Wärtsilä maximises the environmental and economic performance of the vessels and power plants of its customers.

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