Clariant’s EnviCat® Green deoxygenation catalyst series has been selected for a major green ammonia project in China to remove trace oxygen from green hydrogen before it is converted to ammonia. Ammonia is a valuable base chemical needed for applications such as fertilizer production. This carbon-free ammonia production significantly reduces environmental impact and supports energy transition efforts.
Green hydrogen is produced by splitting water into hydrogen and oxygen using renewable electricity through electrolysis. Residual oxygen remains in the output, compromising quality and consistency. The EnviCat Green catalyst can remove oxygen impurities down to 0.1 ppmv, and its excellent activity and mechanical strength ensure effective oxygen removal over a long lifetime, according to the company.
The catalyst has a high gas hourly space velocity (GHSV). This is the volume of gas that passes through a unit volume of catalyst per hour, which affects the contact time between the gas and the catalyst and therefore the efficiency of the catalytic reaction. This high GHSV reduces the required reactor size.
The comany says that their EnviCat emission control catalysts provide proven, cost-effective solutions to help meet regional clean air regulations by removing harmful pollutants from industrial and engine exhaust. The EnviCat Green catalyst series purifies unconventional hydrogen and nitrogen sources by removing oxygen and purifies CO2 for sequestration by removing oxygen, hydrocarbons, and NOx. Additionally, the EnviCat catalyst series cleans off-gases from industrial processes, stationary engines, turbines, and diesel-powered mining equipment, offering catalysts that remove N₂O, NOx, NH₃, volatile organic compounds (VOCs), and CO.
- Clariant AG, Muttenz, Switzerland
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