SO2-tolerant and H2O-promoting Pt/C catalysts for efficient NO removal via fixed-bed H2-SCR

Abstract

In this paper, Pt supports on carbon black powder (Vulcan XC-72) were synthesized via a hydrothermal method for selective catalytic reduction (SCR) of NO with H in the presence of 2 vol% O over a wide temperature of 20-300 °C. The results showed that the 3 and 5 wt% Pt/C catalysts resulted in high NO conversion (>90 %) over a temperature range of 120 to 300 °C, and the maximum NO conversion of 98.6 % was achieved over 5 wt% Pt/C at 120 °C. Meanwhile, the influence of SO and HO on the catalyst performance of 3 wt% Pt/C was investigated. The catalysts exhibited good SO poisoning resistance when the SO concentration was lower than 260 ppm. Moreover, a positive effect on NO conversion was detected with the addition of 3 and 5 vol% HO in the feed gas stream. Graphical abstract TEM image and good NO conversion performance of the Pt/C catalysts.

110th Anniversary: Recent Progress and Future Challenges in Selective Catalytic Reduction of NO by H2in the Presence of O2

“…Cai et al 68 Some new materials, such as carbon and MOF, were also used as support for the preparation of H 2 -SCR catalysts. Tu et al 69 investigated Pt-supported XC-72 for NO reduction by H 2 with excess O 2 . The Pt/XC-72 catalyst exhibited high SO 2 resistance when the SO 2 concentration was below 260 ppm.…”

Controllable growth of Na2CO3fibers for mesoporous activated alumina ball modification towards the high-efficiency adsorption of HCl gas at low temperature

“…[26][27][28][29] For gases at room temperature, alkaline substances are usually used as active materials, supported by impregnation method, to remove acid gas for feeding molten carbonate fuel cells (MCFCs). [30][31][32][33] Lee 34 showed that the HCl capacity of NaOH/AC is about 6 times that of commercial alumina. However, Micoli et al 35,36 investigated the HCl adsorption performance of activated carbon impregnated with KOH, NaOH or Na 2 CO 3 , respectively.…”