Related Experiment Video
Updated: Jun 17, 2025
10:57
Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
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Ni-Sr/TiZr for H2 from methane via POM: Sr loading & optimization
Norah Alwadai1, Abdulaziz A M Abahussain2, Dharmesh M Vadodariya3
1Department of Physics, College of Science, Princess Nourah bint Abdulrahman University P. O. Box 84428 Riyadh 11671 Saudi Arabia.
RSC Advances
|August 14, 2024
Summary
Strontium addition to Ni/TiO2-ZrO2 catalysts significantly enhances methane partial oxidation for high H2 yield. Optimized conditions achieved ~88% methane conversion and 87% H2 yield.
Area of Science:
- Catalysis
- Materials Science
- Chemical Engineering
Background:
- Partial oxidation of methane (POM) is crucial for producing H2 and CO feedstock.
- Ni-based catalysts on titania-zirconia support are investigated for methane conversion via POM.
- Improving catalyst performance, particularly H2 yield and H2/CO ratio, is essential.
Purpose of the Study:
- To examine the effect of strontium (Sr) addition on Ni/TiO2-ZrO2 catalysts for methane conversion via POM.
- To understand the role of basic sites and reducible NiO species in catalyst activity.
- To optimize reaction conditions using response surface methodology for maximum efficiency.
Main Methods:
- Catalyst characterization using X-ray diffraction, Raman-infrared-UV-vis spectroscopy, and TPR-TPD.
- Methane conversion via POM at 600 °C and atmospheric pressure.
- Process optimization using central composite design under response surface methodology.
Main Results:
- 2.5 wt% Sr addition created the highest concentration of extreme basic sites.
- Sr promotion shifted active sites from hardly reducible to easily reducible NiO species.
- Optimized conditions (800 °C, 0.35 O2/CH4, 10,000 SV) yielded ~88% CH4 conversion and 87% H2 yield.
Conclusions:
- Strontium promotion enhances Ni/TiO2-ZrO2 catalyst activity for POM by increasing basic sites.
- Basic sites play a key role in switching reaction pathways, improving H2 yield.
- Optimized catalytic system demonstrates high efficiency for methane conversion and H2 production.
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