measure CO 2 at percentage and parts-per-million levels. This means it can be used to measure the flue gas to ensure most CO 2 has been removed, and to assess the purity of the removed CO 2 before it is sent to storage. Carbon emissions reduction has been a key issue for many countries in recent years, with legislation limiting the amounts of greenhouse gases – CO 2 , CH 4 and nitrous oxide (N 2 O) – that can be emitted. NOx, SOx, and CO are also seen as key pollutants. Monitoring flue gas emissions helps determine the process efficiency and protect the environment, and demonstrates that plant operators are complying with the necessary regulations. Monitoring flue gas emissions
becoming increasingly attractive to many industries – hydrogen gas (H 2 ) does not contain carbon, so cannot form CO 2 as a byproduct of combustion. Plants that produce hydrogen are ramping up output to meet increased demand. The purity of the hydrogen they produce affects its quality as a fuel, and this is where gas analysis again plays a major role. Depending on the manufacturing method, the most common contaminants will be O 2 , CO, and CO 2 . All three of these can be monitored by the ServoPro MultiExact 4200, Servomex’s new multi-component analyser, using a mixture of paramagnetic, infrared, and gas filter correlation technology.
A cleaner future Whether it is used to ensure more efficient processes, to support the safe removal of pollutants, or to monitor the remaining emissions that are output to the atmosphere, gas analysis plays an essential role in cleaner plant and refinery operations. Additionally, it is certain that gas analysis technology will be essential to the production of current and future cleaner energy sources. A wide range of sensing technologies is needed to achieve all the necessary goals of a clean air strategy in order to ensure the best-fit and most cost-effective solution for each application. By combining all three stages of the clean air strategy outlined by Servomex, plants and refineries can fully address the impact of their operations on the wider environment, and contribute fully to the creation of a world with cleaner air.
To ensure compliance, a continuous emissions monitoring system (CEMS) is required to measure all the necessary components of the flue gas. This must be capable of offering the highest sensitivity and accuracy when dealing with multiple measurements for pollutants. Multi-component gas analysers, such as Servomex’s ServoPro 4900 Multigas, are ideal for this application, calling on a variety of sensing technologies to measure the gas components. Depending on the process, it can either deliver all the necessary measurements in one device or form a key part of an integrated, comprehensive CEMS. For example, a single 4900 Multigas can monitor four gases simultaneously, measuring from a choice of O 2 , CO 2 , CO, SO 2 , NO, CH 4 and N 2 O, so multiple analysers can easily cover the pollutants of interest. Any gas analysis system must also meet MCERTS and QAL1 certifications to comply with regulatory criteria. Cleaner energy sources Cleaner energy sources, such as hydrogen, are
Matt Halsey mhalsey@servomex.com
www.decarbonisationtechnology.com
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