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AirScience DeOxo - Oxygen Depletion Process Unit
AirScience experience with oxidation with precious metal catalyst goes back to the early years of the company with the supply of large catalytic reactors for the oxidation of hydrogen bromide (HBr) in the purified terephtalatic acid (PTA) industry. Such as the PTA plants in Montreal, Canada and Altamira, Mexico have used AirScience CaTox units for many years.
More recently AirScience specialized in the valorization of coke oven gas for the primary steel industry. Such gas valorization pathway produces high purity hydrogen from coke oven gas. In the process, oxygen needs to be depleted, and it is done by a DeOxo unit. AirScience has several such installations in operation producing 99.99% pure hydrogen.
Today, AirScience is putting this experience to the purification of biogas/landfill gas. One of the impurity in the gas is oxygen and it is removed through catalytic oxidation of methane in presence of a platinum based catalyst (the DeOxo process) at a temperature range of 350°C (662°F) to 500°C (932°F). One mole of methane depleting two moles of oxygen in the process. The reaction produces one mole of carbon dioxide (CO2) and two moles of water as well as heat equivalent to the heat of combustion one mole of methane.
