Iron ion-exchanged zeolite: the most active catalyst at 473 K for selective reduction of nitrogen monoxide by ethene in oxidizing atmosphere

Effect of addition of Zn on the catalytic activity of a Co/HZSM-5 catalyst for the SCR of NOx with CH4

“…Reductants such as propane, propene and ethylene have been extensively researched on zeolite-and alumina-supported catalysts [1][2][3][4][5][6][7][8][9]. Use of methane as reducing agent, pioneered by the work of Li and Armor [10], has attracted particular interest, since methane is almost present in all combustion exhausts, particularly in the gas-cogeneration system.…”

Enhanced activity of an In–Fe2O3/H-ZSM-5 catalyst for NO reduction with methane

“…Reductants such as propane, propene and ethylene have been extensively studied on zeoliteand alumina-supported catalysts [1][2][3][4][5][6][7]. The CH 4 -SCR process has recently attracted great attention, since methane is almost present in all combustion exhausts, particularly in the gas-cogeneration systems.…”

“…Reductants such as propane, propene and ethylene have been extensively studied on zeoliteand alumina-supported catalysts [1][2][3][4][5][6][7]. The CH 4 -SCR process has recently attracted great attention, since methane is almost present in all combustion exhausts, particularly in the gas-cogeneration systems. Several studies were reported on various types of catalysts for CH 4 -SCR and indicated that Co-ZSM-5, Ga-H-ZSM-5 and In-H-ZSM-5 exhibited high catalytic activities for NO reduction when CH 4 was used as a reductant [8][9][10][11][12].…”

“…The flow-rate of the feed was 60 cm 3 /min (GHSV = 3600 h −1 ). The feeding mixture was prepared by mixing four flowing gases, namely NO, CH 4 , O 2 and He, at the inlet of the reactor, each of them was independently controlled with a mass flow regulator. The feed-gas was controlled to consist of 2500 ppm NO, 2000 ppm CH 4 , 4.0% O 2 , with He as the balance.…”

Promotional effect of colloidal alumina on the activity of the In/HZSM-5 catalyst for the selective reduction of NO with methane

“…As for the reductants, many reports have been published on the use of ethane, propene or propane [4][5][6][7][8][9][10][11][12]. Recently, the using of CH 4 as the reducing agent for SCR of NO x has attracted particularly interest, due to the fact that methane exists in nearly all of the combustion exhausts [13][14][15][16][17][18].…”