Abstract
The catalytic reduction of NO x with hydrogen and carbon monoxide in the presence of excess oxygen was studied over Pd-based catalysts with various pillared clays (PILC) as the support. The results showed that the Ti-PILC-supported Pd catalyst gave high NO conversions and the highest N 2 product selectivity (compared to known catalysts) at low temperatures. For example, the N 2 selectivity at 140 °C was 90% for Pd/Ti-PILC catalyst while that for the Pd/TiO 2/Al 2O 3 catalyst was 50%. The effects of feed gas composition, CO concentration and H 2O/SO 2 were also studied.
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