Mn promoted Pd/TiO2–Al2O3 catalyst for the selective catalytic reduction of NO by H2

Simultaneous removal of PM and NOx over highly efficient 3DOM W/Ce0.8Zr0.2O2 catalysts

“…12 To achieve extremely high performance for abatement, combinations of noble metals with the other catalysts have been used. 13,14 Nascimento et al reported that the Ru-modied Ce 0.4 Zr 0.6 O 2 catalyst was a high performance catalyst for PM oxidation reactions in the temperature range of 220-500 C. 15 The Mn-promoted Pd 0.5 /TiO 2 -Al 2 O 3 catalyst for SCR reaction of NO x by H 2 (H 2 -SCR) was also reported by Duan et al 16 However, the high costs and limited supply of these noble metals restrict their application in viable commercial products. To avoid using the noble metals, new catalysts are greatly desired, especially in a relatively low temperature range, and the search for these continues.…”

Selective catalytic reduction of NO by H2 over Pd/TiO2 catalyst

“…The compositions of the inlet and outlet gases were monitored by a NO/NO2 chemiluminescence analyzer (Thermo Scientific, model 42i-HL) and an FTIR spectrometer (Gasmet FTIR DX4000). The NOx conversion and N2 selectivity were calculated using equations reported previously [19]. At each temperature, the catalytic activity data were collected after the catalytic reaction reached a steady-state condition.…”

“…In the process of H2-SCR, noble metals, especially Pt and Pd, were found to be the active components [14][15][16][17]. Many studies have focused on the development of Pd-based catalysts for the H2-SCR, due to the lower cost of Pd than that of Pt [18][19][20][21][22]. Lee et al [23] reported that Pd/Al2O3 prepared using PdCl2 as the precursor was more active than that prepared using Pd(NO3)2 as the precursor.…”

Promoting NO reduction via in situ activation of perovskite supported Pd catalysts under alternating lean-burn/fuel-rich operating atmospheres

“…Even though Pd has been extensively used for De-NOx reactions, the active chemical states of the Pd sites, i.e. Pd metal or oxide, has not been elucidated so far [32][33][34]. Liu et al reported that PdO was active for the H2-selective catalytic reduction reaction [33].…”

“…Pd metal or oxide, has not been elucidated so far [32][33][34]. Liu et al reported that PdO was active for the H2-selective catalytic reduction reaction [33]. Conversely, Hu et al [34] determined that the high oxidation state of Pd in PdO contributed to its low De-NOx activity during three-way catalysis.…”