Monitoring Plant and Stack Emission
FTIR based analyser available which is capable of directly measuring ppm to ppb levels of CO, NO, NO2, CH2O (formaldehyde), NH3, SO2, N2O, methane and other hydrocarbons, in sample streams containing up to 30% H2O and CO2.
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Monitoring Plant and Stack Emission
John Morris Scientific is the oldest family owned Scientific Instrumentation supplier in Australia. With a wide selection of the worlds finest instruments JMS is the perfect single-source choice for all your laboratory needs.
Historically, combustion exhaust is analysed for species such as O2, SO2, CO2, CO, total hydrocarbons, NO, and NO2 using multiple single gas analysers. These individual analysers have a high initial cost, continuing maintenance cost and cannot measure wet sample streams, so sample condition systems must be installed to remove moisture. The conditioning process can affect the measurement quality and remove compounds of interest.
In addition, current combustion analysers cannot monitor all combustion by-products suggested or required by changes in environmental regulations, including formaldehyde, which has traditionally been difficult to monitor in real time.
Tightening regulations on NOX emissions from stationary combustion sources has brought about the development of Selective Catalytic Reduction (SCR) technologies. These technologies are driving NOX emissions to low single digit ppm levels or below. This reduction is not without some drawbacks to emissions in that ammonia is commonly used by the SCR. Normally, ammonia levels can vary from tens of ppm to tens of ppb, but if not balanced correctly the process results in significant ammonia slip.
One current method to monitor ammonia relies on catalytic conversion of NH3 to NO, which is then analysed using traditional chemiluminescent NOx analysers. This indirect measurement of ammonia adds a significant level of complexity and uncertainty, and current analysers have limited accuracy below a ppm. New technology needs to be provided that will provide 100 ppb NH3 monitoring directly and in real-time.
A FTIR based analyser (MultiGas 2030)is available which is capable of directly measuring ppm to ppb levels of CO, NO, NO2, CH2O (formaldehyde), NH3, SO2, N2O, methane and other hydrocarbons, in sample streams containing up to 30% H2O and CO2. This enables complete exhaust gas measurement on wet streams with minimal sample conditioning. The analyser provides simultaneous analysis and display of more than 30 gases in real-time that include ppm to sub-ppm levels of both formaldehyde and ammonia. F
or example, the analyser can detect 100 ppb ammonia from SCR scrubbers, even in gas streams with high percentage levels of H2O and CO2. The ability to simultaneously detect most combustion by-products, allows for the replacement of several single gas analysers racks into a single compact instrument. Also, the permanently stored spectral calibration data, for each gas species, reduces the need for continuous calibration checks and the quantity of gas cylinders.
Maintenance engineers and technicians will find the robust, fully automated analyser easy to operate and maintain. The analyser incorporates a patented small volume, corrosion-resistant gas cell that enables percent to ppb-level detection of combustion by-products with fast response times. Since the multipass gas cell mirrors require no alignment, they are easily removed for cleaning or replaced and therefore are ideal for industrial applications.
Also, the analyser reduces the space and facilities required for combustion analysers further reducing continued operational costs such as air conditioning and electricity.
This FTIR based analyser provides benefits to emissions monitoring professionals including:
* A low cost, state-of-the-art solution for continuous emissions monitoring
* The ability to analyze and display over 30 gas species (including FAA and EPA-specified criteria pollutants), substantially eliminating the space requirements and cost of conventional single gas rack systems
* Up to 60% reduction in costs and up to 80% reduction in space over traditional continuous emissions monitors (CEM) may be realized
* The ability to monitor pollutants, such as formaldehyde and ammonia, which are not typically monitored by traditional CEMs
* Continuous on-line feedback for combustion tuning, resulting in lower energy use and improved control of SCR ammonia injection
* The 2030 does not require moisture removal from the sample stream, eliminating the need for sample conditioning and the corresponding maintenance.
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