Tri-NOx Multi-Chem Wet Scrubber. Case Study of Our NOx Scrubber in a Hydroprocessing Plant.

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Courtesy of Tri-Mer Corporation

Criterion Catalyst Co. L.P. is the world's largest supplier of catalysts for hydroprocessing, including hydrotreating applications. The company is also a leading supplier of reforming and specialty catalysts for the refining industry.

Criterion's facility in Azusa, CA installed a Tri-NOx Mult-Chem scrubber with a 3000 cfm capacity at 250 lbs./hr. of NOx. The system has four polypropylene columns, three of which form the scrubbing portion of the system and use Tri-Packs column packing. A stainless steel quenching column cools catalyst process offgases from 500 to 150° F.

The scrubber uses an irreversible process involving proprietary solutions and chemistries. Residence time of NOx is minimal, based on the high NOx loading relative to the NO/NO2 ratio. The system operates at greater than 99% efficiency on both NO and NO2 and the stack is clean. No harmful liquid byproducts are generated by the system: the only liquid effluent contains a small amount of soluble salt that is processed by the facility's waste treatment system.

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