PFOS is an extremely stable compound with strong carbon - fluorine bonds, and reports of its accumulation in wildlife and the environment have attracted international attention and concern, leading to the designation of PFOS as a persistent organic pollutant (POP).The persistent nature of PFOS prevents oxidative decomposition using wet chemical oxidation TOC analyzers; however, the Shimadzu high-temperature catalytic combustion TOC analyzer quantitatively recovers PFOS with high sensitivity and accuracy. Here, we demonstrate measurement of PFOS using the TOC-LCPH high-temperature catalytic combustion and the TOC-VWS wet chemical oxidation total organic carbon analyzers.
- Shimadzu Scientific Instruments Inc
- Measurement of TOC in Perfluorochemical (PFOS) Solution
NH3 Slip Monitoring in Fluidized-bed Catalytic Cracking Using the LDS 6 Gas Analyzer – Case Study
Fluidized catalytic cracking (FCC) units are used in refineries to convert low value heavy oils into more valuable lighter compounds. Cracking units are sources of emissions of pollutants (e.g. NOx) and must comply with concentration permits set by local or federal authorithies. Modern technologies are applied to reduce the content of pollutants and to monitor certain gas compounds (here: NH3) in the exhaust gas.The LDS 6 in-situ laser gas analyzer offers the best possible capabilities for this application. It is...
Insitu analysis of ammonia slip and water vapor using a tunable diode laser for SCR/SNCR ...
ABSTRACTEnvironmental Regulations driven by the 1990 Clean Air Act require Power Plants to reduce NOx emissions. SCR`s and SNCR`s reduce NOx emission by injecting ammonia into the combustion flue gas. which ideally reacts with the NOx to form H?0 and Nj. The efficiency of the SCR SNCR is determined by monitoring the outlet for excess NH3. referred to as NH3 slip. The flue gas sample at the measurement point is hot. wet and laden with dust, primarily in Coal Fired Plants (Not usually a problem in Gas Fired...
Effective elimination – Case Study
The LDS 6 laser diode spectrometer supports the effective, safe, and environmentally friendly elimination of odorous gases.Applications in the oil and gas industry are exactly the type of challenge the LDS 6 laser diode process gas analyzer was designed for: sites where high performance and ease of use rank on a par with increased productivity and safety. Those were the requirements of a world-class transshipment and storage facility in Kiire, Japan. The Kiire facility maintains 46 million barrels of crude oil in...
Use of process analytics in aromatics (BTX and Phenol) production plants – Case Study
Aromatics are planar, cyclic compounds with conjugated double bonds, consisting of the elements carbon and hydrogen. Aromatics are important intermediates and used as starting materials for a wide range of products. Aromatics are derived from crude oil and, in small quantities, from coal.Process automation equipment including gas chromatographs and other process analyzers contribute essentially to control and optimize these processes.Siemens, a leader in process analytics, has proven worldwide its competence to...
SITRANS SL in-situ analyzer saves cost for a steel plant replacing existing extractive setup – Case ...
The customerSteel industry plants all over the world have multiple processes, most of them emitting CO and CO2 in very high concentrations (tens of %). CO is used as a combustible due to its high calorific value. It is stored in a huge tank before it is used by the power plant next door. CO in such high concentration is explosive in presence of a few molecules of oxygen. Therefore, continuous monitoring of the O2 concentration in the duct carrying the gas to the tank is a key and a safety issue.So far the measureme...
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