Successful emissions monitoring with CAC GAS Specialty Gases

CAC Gas & Instrumentation
Tuesday, 09 August, 2022

Successful emissions monitoring with CAC GAS Specialty Gases

A “greenhouse gas is any gas that has the property of absorbing infrared radiation (net heat energy) emitted from Earth’s surface and reradiating it back to Earth’s surface, thus contributing to the greenhouse effect. Carbon dioxide, methane, and water vapour are the most important greenhouse gases. To a lesser extent, surface-level ozone, nitrous oxides and fluorinated gases also trap infrared radiation. Greenhouse gases have a profound effect on the energy budget of the Earth system despite making up only a fraction of all atmospheric gases.” (Source:

These greenhouse gases are all considered to be contributors to climate change, which in turn can lead to changes in ecosystems.

Australia’s very high level of emissions per person reflects the nation’s heavy reliance on fossil fuels as a primary energy source.

Australia had the highest greenhouse gas emissions per inhabitant of all OECD nations in 2019, at 21.63 metric tons per capita. (Source:

Stack gas, flue gas and fugitive emissions from oil & gas production, cement, power processing plants, pulp and paper, wastewater treatment plants and landfills all emit greenhouse gases.

However, there is an increasingly strong drive to decarbonise across all industries and transition to a circular, low-carbon economy.

Carbon capture and storage (CCS) involves capturing, transporting and storing greenhouse gas emissions from energy intensive industries, and then injecting the captured greenhouse gases back into the ground. CCS contains CO2 but may also contain trace levels of toxic chemicals such as CO, NOx or SOx.

Energy from Waste (EfW) projects have the potential to divert immense amounts of material going to landfill and reduce harmful emissions, such as methane and CO2.

Thermal energy from waste is becoming a preferential option for treatment of residual waste to create clean energy and divert waste from landfills. This process captures landfill gas (methane) that is treated to generate electricity. In addition to creating electricity for homes, some companies experience cost savings as the electricity can be used in their own manufacturing and operational processes.

Bioenergy technologies like anaerobic digestion also support decarbonisation and can produce clean energy. This process produces two valuable outputs — biogas (composed of methane, carbon dioxide and hydrogen sulfide) and digestate.

Whilst these processes can curb the production of greenhouse gas emissions, they still produce them, albeit it at reduced levels.

Critical to the success of emissions reduction is the ongoing or continuous emissions monitoring and analysis of these greenhouse gas emissions. Apart from any regulatory obligations, it is paramount that operators monitor their concentrations to ensure that there are no gas leaks that will cause health and safety risks. Monitoring and analysing also enables operators to take quick and effective corrective action when necessary.

As part of that process, high-quality specialty gas/calibration gas mixtures are essential to ensuring that the gas analysers are measuring those greenhouse gas emissions accurately.

At CAC GAS, we assist companies across all market sectors by providing calibration and specialty gases for monitoring and analysing emissions. CAC Gas is also a global supplier of gas control equipment.

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