Mathematical Modeling and Experimental Study of Hydrogen Production by Catalytic Steam Reforming of Methane

2013 ◽  
Author(s):  
Parham Sadooghi ◽  
Reinhard Rauch
Keyword(s):  
Steam Reforming ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Diffusion Reaction ◽  
Reactor Wall ◽  
Radial Temperature ◽  
Heterogeneous Model ◽  
Gas Phase Kinetics ◽  
Steam Reforming Of Methane ◽  
Catalytic Steam Reforming

Steam reforming of methane in a packed bed reactor filled with Nickel based catalyst supported on Alumina, (Al2O3) is theoretically and experimentally studied and analyzed. State of the art Finite Element Method software, COMSOL Multiphysics is used to simulate a steady state two dimensional heterogeneous model, coupled with detailed reaction mechanisms modeling surface and gas-phase kinetics that takes into account the diffusion reaction phenomena inside the particles. The simulation results are compared favorably with experimental data. It is shown that strong axial and radial temperature gradients exist near the reactor wall The obtained results are important in design and optimizing of commercial reactors.

scholarly journals Heat and Mass Transfer during Lignocellulosic Biomass Torrefaction: Contributions from the Major Components—Cellulose, Hemicellulose, and Lignin

Processes ◽  
2020 ◽  
Vol 8 (8) ◽  
pp. 959
Author(s):  
Ken-ichiro Tanoue ◽  
Kentaro Hikasa ◽  
Yuuki Hamaoka ◽  
Akihiro Yoshinaga ◽  
Tatsuo Nishimura ◽  
...  
Keyword(s):  
Gas Flow ◽  
Model Simulation ◽  
Packed Bed ◽  
Douglas Fir ◽  
Packed Bed Reactor ◽  
Reactor Wall ◽  
Measured Temperature ◽  
Reactor Performance ◽  
Rate Vector ◽  
Determining Factor

The torrefaction of three representative types of biomass—bamboo, and Douglas fir and its bark—was carried out in a cylindrical-shaped packed bed reactor under nitrogen flow at 573 K of the reactor wall temperature. As the thermal energy for the torrefaction was supplied from the top and the side of the bed, the propagation of the temperature profile of the bed is a crucial factor for discussing and improving the torrefaction reactor performance. Therefore, the temperature and gas flow rate (vector) profiles throughout the bed were calculated by model simulation so as to scrutinize this point. The measured temperature at a certain representative location (z = 30 mm and r = 38 mm) of the bed was well reproduced by the simulation. The volume faction of the bed at temperatures higher than 500 K at 75 min was 0.89, 0.85, and 0.99 for bamboo, and Douglas fir and its bark, respectively. It was found that the effective thermal conductivity is the determining factor for this difference. The heat of the reactions was found to be insignificant.

Electro-catalytic steam reforming of methane over Ni-CeO2/γ-Al2O3-MgO catalyst

2019 ◽  
Vol 192 ◽  
pp. 57-64 ◽  
Author(s):  
Qiang Lu ◽  
Yue Hou ◽  
Sajida Riffat Laraib ◽  
Omeralfaroug Khalifa ◽  
Kai Li ◽  
...  
Keyword(s):  
Steam Reforming ◽  
Steam Reforming Of Methane ◽  
Catalytic Steam Reforming

scholarly journals Porosity effect on ZrO2 hollow shells and hydrothermal stability for catalytic steam reforming of methane

2016 ◽  
Vol 4 (1) ◽  
pp. 153-159 ◽  
Author(s):  
Zi-Yian Lim ◽  
Chunzheng Wu ◽  
Wei Guo Wang ◽  
Kwang-Leong Choy ◽  
Hongfeng Yin
Keyword(s):  
Hydrogen Production ◽  
Steam Reforming ◽  
Hydrothermal Stability ◽  
Potential Solution ◽  
Porosity Effect ◽  
Steam Reforming Of Methane ◽  
Catalytic Steam Reforming

This work reports the development of a Ni@yolk-ZrO2 catalyst, which could be a potential solution to tackling challenges in hydrogen production.

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