PAC ZyNthAir
The PAC ZyNthAir Gas Mixer is an accessory for existing CID510 Cetane Analyzer that removes the need for synthetic air while producing constant, reliable and accurate combustion air. The ZyNthAir is backward compatible with existing CID510 users as well as new users, and many of them will benefit from the reduced cost of purchasing synthetic air and the need to perform a Cetane calibration between gas cylinder swaps. ZyNthAir requires three gas inputs: Nitrogen and Zero Air used to synthesize the 20% Oxygen for reliable combustion, and then small amounts of Oxygen for the automatic calibration of the Oxygen Sensor. The system mixes this gas to produce accurate combustion air with oxygen content of 20%+/- 0.05%.
The CID 510 by PAC is proven to be the most precise analyzer for cetane measurement. It uses a patented method, ASTM D7688, and is included in fuel specifications while providing perfect correlation to ASTM D613. With the CID510 for a typical refinery of 100,000 bpd we can run 0.5 Cetane numbers closer to spec than with a tradition engine method, which means savings of up to $400K per year on cetane improvers.
Synthetic air or medical-grade air has historically been used as the combustion gas for the cetane analyzer. Each time you change a gas bottle with these, the percentage of oxygen in the gas bottles varies due to batch variations. These differences can be +/-0.5% of the oxygen content. This is enough to impact the measurement, and thus calibration needs to be performed on the CID after every gas change. With ZyNthAir, the oxygen content is always within +/-0.05% of the desired combustion gas, even after changing gas cylinders.
That’s why using ZyNthAir with the CID takes this performance to the next level. Controlling the oxygen content in the combustion gas to high levels of precision means that results are more accurate across the full span of cetane measurements, allowing you to run closer to specification and ultimately save on giveaway.
