Selective catalytic reduction of NO with NH3 over HZSM-5-supported Fe–Cu nanocomposite catalysts: The Fe–Cu bimetallic effect

Synthesis of NiMo catalysts supported on mesoporous Al-SBA-15 with different morphologies and their catalytic performance of DBT HDS

“…To determine the strength and types of acid sites of these catalysts, pyridine IR spectroscopy measurements were performed at 200 and 350 • C. The pyridine adsorption IR spectra after degassing at 200 • C are assigned to the total amounts of acid sites, while the IR pyridine adsorption spectra after degassing at 350 • C are associated to the amounts of medium and strong acid sites. The band at 1540 cm -1 is attributed to pyridine adsorbed onto Brønsted acid sites, and the bands at 1450 and 1572 cm -1 are assigned to pyridine adsorbed onto Lewis acid sites, while the band at 1492 cm -1 is ascribed to a combination of Brønsted and Lewis acid sites [59][60][61]. Fig.…”

Self-sustained combustion of carbon monoxide promoted by the Cu-Ce/ZSM-5 catalyst in CO/O 2 /N 2 atmosphere

“…The reason for this may be that copper and cerium species cover the external surface of ZSM-5, blocking a number of zeolite channels, and impeding entry of N 2 into the pores. XRD patterns ( No diffraction peaks attributed to either copper or cerium oxides are observed, which suggests that the copper and cerium species are well dispersed on the ZSM-5 support [15,16].…”

Activity enhancement of WO3 modified Fe2O3 catalyst for the selective catalytic reduction of NO by NH3

“…The present work attempts to develop a novel W-Fe catalyst, considering that Fe oxides contain multiple valence states and high thermal stability [20,21] and WO 3 could bring in more acid sites. Herein, a WO 3 /Fe 2 O 3 catalyst is demonstrated to be active for the NH 3 -SCR of NO x in a wide temperature range.…”