Dual function NiMo/MgO catalyst for biogas valorization to syngas and carbon nanotubes
Pichawee Aieamsam-Aung1,2, Narissara Simma3, Sornsawan Juntala3
1Energy Research Institute, Chulalongkorn University, Bangkok, 10330, Thailand.
Scientific Reports
|May 3, 2025
Summary
This study developed a dual-functional nickel-molybdenum catalyst for efficient biogas conversion. The catalyst converts carbon dioxide and methane into syngas while producing valuable carbon nanotubes, enhancing renewable energy utilization.
Area of Science:
- Catalysis
- Materials Science
- Renewable Energy
Background:
- Transitioning to renewable energy requires efficient conversion of resources like biogas.
- Existing catalytic systems face challenges in fully utilizing biogas components.
Purpose of the Study:
- To develop a novel dual-functional catalytic material for comprehensive biogas utilization.
- To investigate the combined dry reforming and methane decomposition of biogas.
Main Methods:
- A nickel-molybdenum (Ni-Mo) catalyst was synthesized using an impregnation process with an optimized Ni:Mo ratio of 1:0.5.
- The catalyst's performance was evaluated for biogas conversion at 900 °C.
- Carbon nanotube (CNT) generation was analyzed alongside catalytic activity.
Main Results:
- The Ni-Mo catalyst achieved 100% CO2 conversion and 98% CH4 transformation efficiency.
- High-purity syngas with a H2/CO ratio > 3 was produced.
- Simultaneous generation of carbon nanotubes (CNTs) at 0.37 gCNT/gCat-h was observed, with CNT tip-growth limiting catalyst site coverage.
Conclusions:
- The dual-functional catalyst effectively converts biogas into syngas and valuable CNTs.
- CO2 in the biogas feed enhances catalyst stability by mitigating carbon deposition.
- The catalyst's performance and dual utility show significant potential for industrial biogas conversion applications.
