Perma Pure, global leader in the sample gas conditioning space, presented a paper about the use of Nafion technology in continuous emission monitoring systems at the 'Global Energy Technology Summit' (GETS) 2014, organized by NTPC, recently.

With the recent notification issued by the Central Pollution Control Board for continuous emission monitoring systems (CEMS) in highly polluting industries, the Indian market is flooded with CEMS enquiries but the major focus is on analyser specification. Mr. Gene Bohensky, Global OEM Sales Manager, Perma Pure, USA, highlighted the importance of sample conditioning systems in CEMS. The gas analyser reads what it gets as a sample so it is very important to choose the correct sample conditioning system.

Mr Bohensky showed lab results of the difference in SO2 readings of different flue gas compositions, with the most common 'Sample cooler-based gas conditioning system' and 'Nafion-based sample conditioning system'. With the use of flue gas desulfurization (FGD) and Selective Catalytic Reduction (SCR) to reduce SOx and NOx in stacks, pollutant gases emissions are reduced by more than 90% and the measurement required is within 100ppm. At such low levels, the Nafion-based system provides very accurate readings when compared with cooler-based systems. At higher measurement levels, Nafion systems reduce acid mist formation, which gives longer life to the gas analyser and more trouble-free operation overall.

In his paper presentation, Mr Bohensky also showcased case studies of "Chevron - El Sugondo - Monitoring SOx" and "Toyota Motor Manufacturing - Measuring NOx". The technology got the attention of senior technocrats and they discussed measures to adapt the technology to Indian market requirements.

Sunil Balan, Marketing Manager, Halma India. Email: sunil.balan@halma.com