CEM 2014 Preview - Air Monitoring Multigas Monitors and the Growth of FTIR


Gas monitoring instruments are being continually improved to take advantage of new technological developments and in response to new requirements. In general, instruments have become smaller, lighter, easier to operate and require less power. However, the main improvements have been higher measurement precision, reduced drift and reduced cross-sensitivity from the gas matrix. At the same time there has been a move away from single gas instruments to multiparameter instruments, either employing a range of technologies or a multiparameter technology such as FTIR.


Multiparameter analysers are generally more expensive than single parameter analysers. However, the cost comparison moves in favour of multiparameter as more gases are measured because the purchase cost of several individual analysers is likely to exceed the cost of a single multiparameter FTIR. In addition, the cost of ownership for FTIR is much lower because it does not need expensive re-calibration and the requirement for consumables is minimal.


A variety of factors affect the choice of analyser, but the regulatory requirement is of course the most significant. A coal fired power station for example, may only be required to monitor SO2


and CO emissions, whereas a municipal waste incineration plant will have to monitor other parameters such as organic compounds, HCl, HF and dioxins and heavy metals etc. FTIR is ideal for process operators that need to:


1) Analyse multiple components, or 2) Analyse hot/wet gas (HCl for instance) or 3) Analyse any gas in complicated gas mixtures.


The flexibility of FTIR to analyse new gases without the need for new hardware is particularly advantageous for manufactured products and processes which often change and necessitate an adjustment to the monitoring strategy. A further benefit of continuous process monitoring is that it provides an opportunity for feedback control of the process and/or the creation of alarms.


The most recent development in multigas monitoring is the transfer of FTIR technology to the portable instrument sector. This has resulted in a portable analyser that is able to produce laboratory levels of accuracy in the field, for almost any gas. The choice of analyser for process, ambient or stack monitoring is dictated by a wide range of factors that can have a substantial effect on the cost, so it is often helpful to obtain expert advice before making an investment in monitoring technology.


Mercury Emissions Monitor Draws Crowds in Edinburgh


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“We received requests for monitoring applications covering mercury emissions in coal and waste incineration, to emerging measurement requirements such as mercury in natural gas and other forthcoming regulatory driven applications.


“Most of the visitors to our booth were looking for a monitor with low detection limits, no interferences and with low operating costs, so the CMM was ideal for their needs.” The Gasmet CMM employs cold vapour atomic fluorescence (CVAF) to deliver very low detection limits at a significantly lower cost than other comparable mercury monitoring instruments.


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The CVAF spectrometer has an integrated high temperature converter to effectively transform mercury compounds to atomic mercury without any chemicals or vulnerable catalyst materials. The close coupling of converter and fluorescence cell also ensures that Mercury does not recombine to, for example, Mercury Chloride between the converter and the Mercury Analyser. Sample gas dilution with synthetic nitrogen generated within the CMM system is an effective tool to promote sample transportation whilst decreasing the loss of Hg0 fluorescence signal to interactions with O2


, CO2 , and H2 designed to eliminate stray reflections and background light so that even with sample dilution the CMM system is capable of monitoring low levels of mercury as required in the forthcoming US Clean Air Mercury Rule.


The system is controlled through a touch screen control panel, which is integrated with the analyser and calibrator inside an air-conditioned cabinet, and calibration is maintained with regular automatic zero and span calibrations using Hg0 and HgCl2 calibration gases generated within the CMM system - typically every 24 hours. Periodic linearity checks with atomic mercury or mercury chloride are also possible. Further information is available on the website.


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26781pr@reply-direct.com O. The fluorescence cell is specially


Gasmet (Finland) unveiled a new continuous mercury monitoring system (CMM) at Mercury 2013 in Edinburgh, Scotland, during the ‘International Conference on Mercury as a Global Pollutant’. Expressing his delight with the number of enquiries received, Gasmet Europe’s Antti Heikkilä said: “With delegates from over 50 countries, the conference was extremely well attended and our booth received a constant stream of enquiries throughout the week.


28708pr@reply-direct.com , NOx


19


Advanced Solutions for Gas Monitoring.


Global solutions for Gas monitoring


The Gasmet range of emissions monitoring equipment now includes total gaseous mercury measurement.


The lowest measuring range is � � �� µg/Nm� and the detection limit is �.�� µg/Nm


The Gasmet CMM continuous mercury monitoring system is ideal for the measurement of low levels of mercury emissions in tough process conditions. Thanks to the advanced Cold Vapour Atomic Fluorescence (CVAF) measurement principle, precise measurement of mercury is possible in samples containing high levels of dust and Sulphur Dioxide. The lowest measuring range is detection limit is �.�� µg/Nm�.


Gasmet FTIR gas analysers are designed for industrial emissions, process, and occupational health measurements. Multicomponent gas analysis using FTIR allows simultaneous measurement of dozens of organic and inorganic gases without sample gas treatment or dilution. The Gasmet CEM II continuous emissions monitoring system meets EN ������� measurement accuracy requirements for all certified gases.


Gasmet CEMS II (FTIR)


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For More Info, email:


TÜV and EN ������� appro�ed Continuous Emissions Monitoring System for CO, NOx, SO2, NH3, HCl, and HF.


1706ad@reply-direct.com Gasmet CMM (Mercury)


Continuous Emissions Monitoring System for total gaseous Mercury in power plants, incinerator plants and process applications


Pulttitie �


����� Helsinki FINLAND


Gasmet Technologies Oy Pulttitie � A � ����� Helsinki


Tel: ���� � ��� �� ��� email: contact@gasmet.fi www.gasmet.fi


www.envirotech-online.com IET March / April 2014


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