Related Experiment Video
Updated: Nov 9, 2025
10:00
Hydrogen Production and Utilization in a Membrane Reactor
Published on: March 10, 2023
2.8K
Combined Syngas and Hydrogen Production using Gas Switching Technology
Ambrose Ugwu1, Abdelghafour Zaabout2, Felix Donat3
1Department of Energy and Process Engineering, Norwegian University of Science and Technology, Trondheim, 7491, Norway.
Industrial & Engineering Chemistry Research
|April 12, 2021
Summary
This study demonstrates a three-stage gas switching technology (GST) for syngas production from methane. Co-feeding CO2 with methane significantly reduces carbon deposition, enhancing syngas purity and hydrogen production.
Area of Science:
- Chemical Engineering
- Materials Science
- Catalysis
Background:
- Syngas production from methane is crucial for various chemical processes.
- Gas Switching Technology (GST) offers a promising route for efficient syngas generation.
- Lanthanum-based perovskites are effective oxygen carriers for methane conversion.
Purpose of the Study:
- To experimentally demonstrate a three-stage GST process for syngas and hydrogen production from methane.
- To investigate the effect of CO2 co-feeding on methane conversion and carbon deposition.
- To evaluate the performance of a lanthanum-based oxygen carrier under varying conditions.
Main Methods:
- A three-stage GST process (fuel, steam/CO2, air) was employed using La0.85Sr0.15Fe0.95Al0.05O3 as the oxygen carrier.
- Experiments were conducted at temperatures ranging from 750-950 °C and pressures up to 5 bar.
- Methane conversion, syngas composition (H2/CO ratio), and carbon deposition were analyzed.
Main Results:
- The oxygen carrier showed high selectivity for methane oxidation to syngas, with performance improving at higher temperatures.
- Co-feeding CO2 with CH4 significantly reduced carbon deposition, lowering the H2/CO ratio from 3.75 to 1.
- Stable syngas production over 12 hours was achieved with CO2 co-feeding, and steam addition tuned the H2/CO ratio beyond 3.
Conclusions:
- The three-stage GST process is effective for producing syngas and pure hydrogen from methane.
- CO2 co-feeding mitigates carbon deposition, enhancing process efficiency and product purity.
- The developed process is adaptable for various downstream applications, including gas-to-liquid processes.
Related Concept Videos
02:13Reduction of Alkenes: Catalytic Hydrogenation
13.1K
Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
13.1K
02:17Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.6K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
3.6K
02:24Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
8.4K
Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
8.4K
02:50Catalysis
28.8K
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.
28.8K
01:28Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation
5.2K
Unlike the easy catalytic hydrogenation of an alkene double bond, hydrogenation of a benzene double bond under similar reaction conditions does not take place easily. For example, in the reduction of stilbene, the benzene ring remains unaffected while the alkene bond gets reduced. Hydrogenation of an alkene double bond is exothermic and a favorable process. In contrast, to hydrogenate the first unsaturated bond of benzene, an energy input is needed; that is, the process is endothermic. This is...
5.2K