44 Air Monitoring Checking H2


VOC emissions cost-eff ectively and continuously around the refi nery or plant


S, SO2 and


Precise, cost-eff ective and stable


urban air monitoring technology A continuous ambient air quality monitoring system (CAAQMS) will monitor the air quality of a city on a real-time basis. It will continuously measure air pollutants throughout the year in a consistent manner. The air pollutants measured are as follows: SO2


, NO, NO2 , NH3 , CO, O3 , CO3 , VOC, PM10 , and PM2.5 . Then again, CAAQMS is the high-level variant of the AAQMS


air quality monitor system. It utilises very high-quality innovations like the Internet of Things for computerised information assortment and its exchange and investigation at the focal server. The information moved to the waiter progressively, and its stretch is fl exible between 2 and 30 minutes. In the middle, the information is naturally investigated with cutting-edge computer-based intelligence and chronicled or utilised likewise.


Vasthi Engineers Pvt Ltd provide a highly sophisticated range of CAAQMS analysers. Their Vair-9009 is a precise and dependable instrument for measuring particulate matter in air (PM10


±1% for <100 µg/m3 ±2% for <500 µg/m3 ±5% for <1000µg/m ±10%for<10000µg/m3


can operate in temperatures ranging from 0 - 40°C and humidity of 0 – 90%. Vasthi Engineers’ Million Plus Cities Urban Air Quality analyser offers speed and precision for analysing levels of SO2


NO2


If you are responsible for air pollution around an oil, gas or industrial site, you have a range of options at different price points. AQMesh offers a cost-effective way to continuously monitor ambient air quality, as frequently as every minute, with readings accessed securely online and user-settable alerts. This system offers an ideal, confi dential fi rst step to understanding whether you – or your neighbours – have an emissions problem, particularly as the equipment is available on a rental basis, anywhere in the world.


AQMesh has been used in a wide range of applications - from the coldest to hottest conditions - for over ten years, and 15 different pollutant and environmental measurements can be provided by a single pod, using bespoke sensor confi gurations. The most popular measurements for petrochemical customers are hydrogen sulphide, sulphur dioxide and volatile organic compounds.


H2 S, SO2 fi gure ppb, with a high level of accuracy, and CO2


and TVOC – including EtO – can be measured down to single readings provide a


real-time, accurate measurement of local combustion. AQMesh pods can be quickly and easily deployed around petrochemical fence lines, landfi ll boundaries, wastewater site perimeters and around mining facilities to provide completely confi dential real-time air pollution data.


One requirement we see regularly is for monitoring around vulnerable communities, such as housing areas or schools, to understand potential exposure. Pods are being used in a variety of oil & gas, manufacturing and processing applications to detect and identify sources of pollution and inform potential mitigation strategies. Although not a regulatory instrument – so readings are not generally reportable – various data management techniques can offer traceability back to an approved methodology, providing data quality assurance.


More information online: ilmt.co/PL/oBxb For More Info, email:


email:


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62193pr@reply-direct.com , Ozone, CO, benzene, particulates to PM10 and PM2.5 , to a resolution of 1 ppm. This rugged and reliable device is the


ideal tool for understanding air pollution levels in urban conglomerations and can be solar powered, with 4 hours back-up battery life if necessary.


For those requiring measurements of specifi c parameters, the Vair-9001 measures sulphur dioxide (SO2 ) in ambient air


providing operators with a precision within 1% of the reading, or 1 ppb and operating in temperature ranging from 5 - 40°C, this highly advanced analyser operates by utilising ultraviolet fl uorescence technology (UVF). The Vair-9002 measures ozone (O3


) in ambient air using UV photometry; it provides end users with a highly precise analyser (0.5% of reading or


1ppb) in operating temperatures of 5 - 40°C. The Vair-9003 precisely measure carbon monoxide (CO) levels in air (1% of reading or 0.1 ppm) also in temperatures ranging from 5 - 40°C using non-dispersive infrared analysis (GFC NDIR). All these instruments provide rest-assured accuracy and dependability and have achieved certifi cation from various international agencies including the USEPA.


The Viar 3000 Series Particulate Monitor measures airborne particulates to PM10 extensive temperature range of -20 - +55°C it offers a measuring range of 0-5mg/m3


measurement technology.


Vasthi Engineers also offer an ultrasonic weather monitoring station to enable end users to factor in meteorological factors when appraising urban air quality. With a wind speed range of 0.5 to 99.5 knots (1 to 185 kph) and resolution of 0.1 knot (0.19 kph) – this device provides the crucial weather data necessary to comprehend the levels of airborne pollutants.


More information online: ilmt.co/PL/xzMq For More Info, email:


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Real-time optical technique for determining impurities in hydrogen gas production


Chromacity Ltd. reports on the development of a next-generation optical solution for the detection of contaminants in renewable hydrogen.


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While renewable hydrogen is widely acknowledged to play a growing role in decarbonising the economy, challenges remain to control its purity. With supply from diverse sources including green, blue and regasifi ed hydrogen from storage media, users need confi dence that the gas they use is of suffi cient quality that it will not damage key components such as fuel cells or infrastructure.


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Working in partnership with the Herriot Watt University* and Fraunhofer UK*, a new solution combining high brightness, coherent Optical Parametric Oscillator (OPO) laser technology from Chromacity Ltd., with advanced FTIR spectroscopy techniques, has been shown to offer advantages over current technologies. ISO 14687:2019, which defi nes thresholds for a wide range of contaminants in hydrogen for fuel cells, is being used to benchmark this exciting development.


Julian Hayes, CEO of Chromacity Ltd commented “Existing optical solutions for determining the purity of renewable hydrogen either compromise on spectral resolution and detection sensitivity or are overly complex making them expensive which limits deployment. Likewise, the implementation of sensitive gas chromatography techniques is limited because the instrumentation is costly, bulky, and online sampling is challenging.”


He added “Based on a single light source, our solution removes the complexities of multi-source optical techniques and so lowers the cost of ownership. The broad, tuneable bandwidth of the OPO laser allows many contaminants to be detected, including broad or complex chemical signatures. Our instrument is designed to be used in-line and has been shown to monitor the fi ve key contaminants in the renewable hydrogen production process (as detailed in ISO 14687) in real time”.


Mr Hayes concluded “Having been successfully tested in the lab on representative gas samples, the next stage of developing the system is to enable users to use live real-time data to drive optimisation of the production process.”


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IET SEPTEMBER / OCTOBER 2024


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or PM2.5 or TSP. Operating at an to 30mg/m3 using laser scattering


) – this low maintenance device provides accuracy of , with excellent repeatability of <±3%. It


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