Glycerol dry reforming over Ni supported on fibrous ZSM5 and ZY: Correlation of structural properties on H2 production

• Published in: Chemical engineering research & design Vol. 209; pp. 358 - 366
• Main Authors: Abdullah, N., Ainirazali, N., Hanafi, N.S.S., Setiabudi, H.D., Chin, S.Y., Mohamed, A.R., Jalil, A.A.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.09.2024
• Subjects: Coke resistance; Fibrous aluminosilicate; Glycerine; Metal-support interaction; Nickel; FZSM5; FZY; GHG; XRD; STP; KCC-1; Ni/FZSM5; GDR; FTIR; XPS; Metal-support interaction; HFZ; SBA-15; CC; Glycerine; GHSV; GC-TCD; Ni/FZY; ZSM5; Coke resistance; TGA; BET; Nickel; Fibrous aluminosilicate; TEM; ZY
• ISSN: 0263-8762
• DOI: 10.1016/j.cherd.2024.08.012

This study investigates fibrous ZSM5 (FZSM5) and Zeolite Y (FZY) as supports for producing hydrogen via glycerol dry reforming. The fibrous ZSM5 and ZY were synthesized hydrothermally with microemulsion and impregnated with 10 wt% Ni via a sonication method. The catalytic test was conducted via a vertical stainless steel fixed-bed rig, at 800°C with a glycerol/CO2 ratio of 1. XRD and N2 sorption revealed the reduced surface area and crystallinity in Ni/FZSM5 compared to Ni/FZY. Ni/FZY catalyst displayed a larger surface area (264 m2/g) and aperture width (6.70 nm) in comparison to Ni/FZSM5, which had a surface area of 238 m2/g and an aperture width of 3.90 nm. Ni/FZY also had a smaller NiO crystallite size (8.73 nm) than Ni/FZSM5 (9.79 nm), suggesting well-dispersed Ni species on the wrinkle fiber of FZY’s surface. Ni/FZY outperformed Ni/FZSM5 with 52.49 % glycerol conversion, 44.87 % H2 yield, 71.31 % CO yield, and only 14.4 % carbon formation, attributed to robust Ni-O-Si contact and larger pore diameter. The discovery highlights the catalytic efficiency of the Ni-loaded fibrous zeolite in GDR, offering versatility for application in energy storage and catalysis. [Display omitted] •Fibrous zeolite catalysts were synthesized via microemulsion method.•Ni/FZY achieved a high glycerol conversion of 52.59 % and H2 yield of 44.9 %.•High activity attributed to its large surface area and strong Ni-support contact.•The fibrous morphology enhanced Ni dispersion and inhibited coke formation in GDR.