Stable Performance of Supported PdOx Catalyst on Mesoporous Silica-Alumina of Water Tolerance for Methane Combustion under Wet Conditions

In methane combustion, water tolerance of Pd-based catalysts is quite critical for stable performance, because produced in situ and a water-containing feed used under real conditions. Herein, water-tolerant mesoporous silica-alumina (H-MSA) was prepared by solvent deficient precipitation (SDP) using triethoxy(octyl)silane (TEOOS) aluminum isopropoxide (AIP). The H-MSA more tolerant to than ?-alumina, alumina (MA), (MSA) synthesized tetraethyl orthosilicate (TEOS), the silica present on external particle surface. Moreover, it exhibited better textural properties, leading higher dispersion PdOx. PdOx catalyst supported durable repeated temperature-programmed cycles isothermal tests presence vapor, compared reference catalysts. measured stability attributed tolerance, weak Lewis acidity, penta-coordinated Al species support, which preferentially imparted when TEOOS added substitution 5 mol% AIP synthesis H-MSA. Therefore, SDP method employed herein useful endowing with necessary combustion performance wet