A stable Ni/SBA-15 catalyst prepared by the ammonia evaporation method for dry reforming of methane

Abstract

Coking and sintering were inhibited simultaneously by the strong metal–support interactions.

Simply packaging Ni nanoparticles inside SBA-15 channels by co-impregnation for dry reforming of methane

“…As shown in the low-angle XRD patterns, each spectrum exhibited three well-resolved diffraction peaks in the region of 2q ¼ 0.5-2.5 , which were assigned to the (100), (110), and (200) reections, revealing that the support material was characteristic of the highly ordered 2D-hexagonal mesoporous structure (p6mm). 19 Aer Ni loading, there was only a slight shi toward higher angles, relative to the low-angle peaks of the SBA-15 support, proving that the catalyst preparation had no signicant effect on the mesoporous structure. The N 2 adsorption/desorption isotherms of the samples and the pore size distribution are presented in Fig.…”

“…The EG in the nickel nitrate aqueous solution could assist the Ni precursor in easily entering the SBA-15 channels by capillary force, and as the solvent was continually evaporating, the additive EG was adsorbed onto the internal surface of the mesoporous channels, which inhibited the redistribution and agglomeration of the impregnated solution upon drying of the support. [16][17][18][19] As a result, the highly dispersed Ni nanoparticles were almost anchored in the SBA-15 channels with strong metal-support interactions, and were simply acquired by coimpregnation using ethylene glycol (EG). The connement effect of mesoporous channels was strongly benecial for preventing the sintering of Ni nanoparticles and suppressing carbon deposition so that the acquired catalysts presented higher activity and excellent stability in the severe DRM reaction.…”

Clarification of Active Sites at Interfaces between Silica Support and Nickel Active Components for Carbon Monoxide Methanation

“…Wide-angle X-ray powder diffraction (XRD) patterns of the Ni/SiO 2 are shown in Figure 2e. [11,28,29]. The peak intensity was weak and exhibited a wide half-peak breadth in the XRD pattern because of the small and finely dispersed of Ni particles [27].…”

Effect of NiO Loading and Thermal Treatment Duration on Performance of Ni/SBA-15 Catalyst in Combined Steam and CO₂ Reforming of CH₄

“…It was found that diffraction peaks with high intensity appeared at 2ª = 37.3°, 43.2°, 62.9°, 75.4°, 79.3°corresponding to (101), (012), (220), (311) and (222) plans of face-center cubic crystalline NiO structure in all catalysts. 9,10) This fact indicated that NiO in all catalyst had a high degree of crystallinity. Moreover, these peaks were broader and their intensity increased as NiO content was raised from 30 to 60 mass%, indicating the independent existence of NiO particles on the support surface.…”