Highly Efficient Removal of CO in Effluent Streams from Real‐Life Propane Oxidation Process over CuO−CeO₂−Based Catalysts

Abstract

Selective removal of CO from the effluent streams in real-life chemical processes is of great importance in many different fields of industry. Until now it remains challenging to use nonprecious metal oxides to selectively remove CO at low temperatures from real-life chemical effluent with complex compositions. Herein, a series of binary and ternary transition metal oxide catalysts were prepared by co-precipitation method and employed for the preferential removal of CO in the effluent stream (off-gas) of propane selective oxidation. It was found that the CuOÀCeO 2 Àbased mixed oxide catalyst exhibited the best CO removal performance, wider operating temperature window and higher resistance to the inhibition of hydrocarbons, H 2 O and CO 2 . The presented catalyst showed high potential for selective removal of CO in the off-gas stream containing CO 2 , H 2 O and various hydrocarbons.

Promotion of Low‐Temperature Oxidation of Propane through Introduction of Ce into Mullite Oxide YMn2O5

“…Compared with noble metal catalysts, transition-metal oxides are attractive due to their low cost, high thermal stability and promising activity. [11][12][13][14] Among various transition metal oxides, Mn-based mullite AMn 2 O 5 (A = lanthanides) with a low symmetric structure has been discovered to show superior catalytic activity and thermal stability in the oxidation of carbon monoxide, nitric oxide, acetone, toluene, benzene, propene, etc.. [15][16][17][18] Fundamentally, the excellent catalytic behavior of mullite stems from its unit occupy of the e g (dz 2 and dx 2 -y 2 ) orbitals of Mn-dimer atoms around the Fermi level. Specifically, Mn-based mullite materials containing two kinds of Mn-centered ligand fields, i. e., octahedron and pyramid.…”