AQESHOW - Abstract

Abstract Information :

Finden Ltd have developed a low temperature catalyst and catalytic reduction process using ultradilute hydrogen for selective catalytic reduction (H2-SCR) of toxic NOx offering a safer, lower cost, environmentally friendly alternative to ammonia. Our process can convert > 99 % NOx in a single pass at low temperatures (> 80 °C) often with a 100 % selectivity to harmless N2 notably avoiding N2O a potent greenhouse gas with a global warming potential (GWP) 273 times that of CO2. It is also noteworthy that our catalyst formulations are highly efficient for H2 oxidation at these at low temperatures ensuring no hydrogen ‘slip’. We note that despite the current and projected expansion in the availability and utilisation, H2 is a greenhouse gas with a GWP some 10 times greater than CO2 potentially rendering this ‘solution’ to the burning of fossil carbon, worse than the problem it was developed to mitigate if this issue of slip is not properly dealt with. To date we have been focussing on catalyst formulation and lab scale testing at low NOx levels (~100 – 500 ppb) mainly for addressing indoor air quality market. We have demonstrated that we can successfully coat monoliths with our catalyst and that it can maintain catalytic performance over many hours and over several days. We have also recently demonstrated that our catalyst works at higher NOx concentration with a recent test showing we can fully covert NOx at ca. 500 ppm. This opens up the potential for our technology to wider applications, specifically addressing NOx at source. We have used state of the art operando X-ray and optical spectroscopy characterisation techniques to identify the catalytically active metal species and novel H2-SCR deNOx pathways.