Defect-stabilized nickel on beta zeolite as a promising catalyst for dry reforming of methane

Abstract

Four different Ni-containing beta zeolite (Ni-BEA) catalysts were synthesized and applied for dry reforming of methane (DRM). Ni-BEA(I) exhibiting a nickel silicate was synthesized via the single-step interzeolite transformation of...

Formation of Ni Species Anchored on a Silicalite-1 Zeolite Framework as a Catalyst with High Coke Deposition Resistance on Dry Reforming of Methane

“…UV-vis spectra of the four samples are shown in Figure . In Ni/silicalite-1, a broad peak at ∼300 nm derived from bulk Ni and NiO , was observed, whereas the bulky NiO-derived peaks were hardly observed for Ni-silicalite-1 DGC and HT. This result suggests that Ni species were almost incorporated into the framework.…”

Catalytic Glucose Conversion over Zeolitic Stannosilicates: A Comparative Study of Structural Properties

“…Figure a shows the OH-IR spectra of all of the stannosilicates prepared in this study. While Sn-MWW(3D) exhibited the low intensity of the IR band for hydroxyl groups, Sn-MWW(2D) showed a significant presence of silanol groups appeared at around 3690 and 3732 cm –1 , assignable to the silanol defect and terminal silanol groups, respectively . These results indicate that despite the deboronation in Sn-MWW(3D) synthesis, the final bottom-up hydrothermal synthesis minimized the formation of defect and isolated silanol groups with stable Sn substitution.…”

“…While Sn-MWW(3D) exhibited the low intensity of the IR band for hydroxyl groups, Sn-MWW(2D) showed a significant presence of silanol groups appeared at around 3690 and 3732 cm −1 , assignable to the silanol defect and terminal silanol groups, respectively. 39 These results indicate that despite the deboronation in Sn-MWW-(3D) synthesis, the final bottom-up hydrothermal synthesis minimized the formation of defect and isolated silanol groups with stable Sn substitution. Incidentally, Sn-MWW(2D) had many silanol groups on its large external surface area due to the structural feature of the 2D layer (Table 1), which is generally observed in the 2D MWW structure.…”

Confinement effects over Ni-based catalysts for methane dry reforming

“…Silica sieves (S-1) have been explored as a carrier for encapsulated Ni nanoparticle catalysts for MDR to solve the issue of sintering and carbon deposition. [85][86][87] The hydrothermal preparation of 7Ni@S-1 catalyst was shown to result in more evenly dispersed nickel species, including Ni 0 particles, nickel oxide, and nickel phyllosilicates (Fig. 6), which could promote the formation of Ni particles and Ni 2+ -O 2− as well as facilitate the adsorption and activation of reactant molecules.…”