An Introduction to Greenhouse Gases

Greenhouse gases are generally any gas molecules or compounds in the atmosphere which interact with outgoing infrared radiation from the sun and thus contribute to the Greenhouse Effect by warming the atmosphere. The major constituents of the atmosphere such as nitrogen (N2) and oxygen (O2) do not interact with infrared radiation and, thus are not […]

Biogas Enrichment using PSA Technique

Pressure swing adsorption, also known as carbon molecular sieves, is one of most popular biogas upgrading techniques. A typical PSA system is composed of four vessels in series that are filled with adsorbent media which is capable of removing water vapor, CO2, N2 and O2 from the biogas stream. During operation, each adsorber operates in an alternating […]

Few Words on Landfill Gas

Landfill gas (or LFG) is an asset as well as a serious threat. If we extract it right on time and preserve it then it will act as a valuable asset and if we leave as it is then it will be a serious threat as it can explode at any time. Landfill gas is […]

What is Biomethane

The typical composition of raw biogas does not meet the minimum CNG fuel specifications. In particular, the CO2 and sulfur content in raw biogas is too high for it to be used as vehicle fuel without additional processing. Biogas that has been upgraded by removing H2S, moisture and carbon dioxide is known as biomethane. Biomethane is […]

Biogas Cleanup Methods

Cleanup of biogas is primarily achieved by carbon dioxide removal which enhances the energy value of the gas to give longer, driving distances with a fixed gas storage volume. Removal of carbon dioxide also provides a consistent gas quality with respect to energy value. The latter is regarded to be of great importance from the vehicle […]

Why Ocean Acidification Matters

There is a forlorn hope that spraying 7 billion tonnes per year of fossil carbon (in the form of carbon dioxide) from the combustion of coal, oil and gas into the atmosphere will have little impact on the chemical structure of the atmosphere and the oceans. Sadly, this is not the case. Since the industrial […]