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Catalysis

Catalysis

The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.

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Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation

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Dry Reforming of Methane Using Gd-promoted Ni/SBA-16 Catalyst: Structure, Activity and Process Optimization with

Salma A Al-Zahrani^1,2, Mohammed F Alotibi³, Ahmed I Osman⁴

¹Chemistry Department, Faculty of Science, University of Ha'il, P.O. Box 2440, Ha'il 81451, Saudi Arabia.

Nanomaterials (Basel, Switzerland)

|October 15, 2025

Summary

Gadolinium promotion enhances nickel catalysts for dry reforming of methane, boosting syngas production. Optimized conditions and catalyst design significantly increase hydrogen yield and minimize coke formation.

Keywords:

Ni/SBA-16 catalyst catalyst optimization dry reforming of methane gadolinium promoter hydrogen production response surface methodology (RSM)

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Chemical Precipitation Method for the Synthesis of Nb2O5 Modified Bulk Nickel Catalysts with High Specific Surface Area

Chemical Precipitation Method for the Synthesis of Nb2O5 Modified Bulk Nickel Catalysts with High Specific Surface Area

Published on: February 19, 2018

Area of Science:

Catalysis science and engineering
Materials science for energy applications
Chemical reaction engineering

Background:

Dry reforming of methane (DRM) is crucial for syngas production but is limited by catalyst deactivation.
Nickel-based catalysts are effective for DRM but prone to coking and sintering.
Gadolinium (Gd) promotion is explored to enhance the stability and performance of nickel catalysts.

Purpose of the Study:

To investigate the effect of gadolinium promotion on nickel-based SBA-16 catalysts for dry reforming of methane.
To optimize catalyst composition and reaction conditions for improved syngas production and catalyst stability.
To understand the role of gadolinium in enhancing metal-support interactions and redox properties.

Main Methods:

Synthesis of Gd-promoted Ni/SBA-16 catalysts using co-impregnation with varying Gd loadings (0.5-3 wt.%).
Characterization techniques: XRD, N2 physisorption, FTIR, XPS, H2-TPR, CO2-TPD, TGA-DSC, and Raman spectroscopy.
Dry reforming of methane performance testing and optimization using Response Surface Methodology (RSM).

Main Results:

Moderate Gd loadings (1-2 wt.%) improved metal-support interactions and maintained a balanced distribution of reducible Ni species.
The 1-2 wt.% Gd-promoted catalysts achieved high H2 (approx. 67%) and CO (approx. 76%) yields at 800 °C.
RSM optimization predicted optimal conditions yielding 96.64% H2, closely matching experimental results (96.66%).
The 5Ni-2Gd/SBA-16 catalyst showed minimal coke deposition, primarily graphitic, indicating enhanced stability.

Conclusions:

Gadolinium promotion significantly enhances the performance and stability of nickel-based SBA-16 catalysts for DRM.
Optimized catalyst composition (5Ni-2Gd/SBA-16) and reaction conditions maximize hydrogen yield and minimize coke formation.
The study demonstrates the synergistic effect of catalyst design and process optimization for efficient syngas production.