Intraparticle Heat and Mass Transfer Characteristics of Water Vapor Adsorption

2002 ◽  
Vol 35 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Eri Yamamoto ◽  
Fujio Watanabe ◽  
Noriyuki Kobayashi ◽  
Masanobu Hasatani
Keyword(s):  
Mass Transfer ◽  
Water Vapor ◽  
Heat And Mass Transfer ◽  
Water Vapor Adsorption ◽  
Vapor Adsorption ◽  
Transfer Characteristics

Heat and Mass Transfer Characteristics in Adsorption of Water Vapor for Silica Gel Packed Bed Adsorber.

2000 ◽  
Vol 33 (1) ◽  
pp. 12-18 ◽  
Author(s):  
Eri Yamamoto ◽  
Koichi Katsurayama ◽  
Fujio Watanabe ◽  
Hitoki Matsuda ◽  
Masanobu Hasatani
Keyword(s):  
Mass Transfer ◽  
Water Vapor ◽  
Heat And Mass Transfer ◽  
Silica Gel ◽  
Packed Bed ◽  
Transfer Characteristics ◽  
Adsorption Of Water ◽  
Adsorption Of Water Vapor

Water vapor adsorption on metal-exchanged hierarchical porous zeolite-Y

2021 ◽  
pp. 111380
Author(s):  
Aasif A. Dabbawala ◽  
K. Suresh kumar Reddy ◽  
Hemant Mittal ◽  
Yasser Al Wahedi ◽  
Balasubramanian V. Vaithilingam ◽  
...  
Keyword(s):  
Water Vapor ◽  
Zeolite Y ◽  
Water Vapor Adsorption ◽  
Vapor Adsorption ◽  
Hierarchical Porous

Numerical Analysis of the Heat and Mass Transfer Characteristics in an Autothermal Methane Reformer

2010 ◽  
Vol 7 (5) ◽  
Author(s):  
Joonguen Park ◽  
Shinku Lee ◽  
Sunyoung Kim ◽  
Joongmyeon Bae
Keyword(s):  
Mass Transfer ◽  
Numerical Analysis ◽  
Heat And Mass Transfer ◽  
Steam Reforming ◽  
Space Velocity ◽  
Reaction Model ◽  
Operating Conditions ◽  
Local Thermal Equilibrium ◽  
Inlet Temperature ◽  
Transfer Characteristics

This paper discusses a numerical analysis of the heat and mass transfer characteristics in an autothermal methane reformer. Assuming local thermal equilibrium between the bulk gas and the surface of the catalyst, a one-medium approach for the porous medium analysis was incorporated. Also, the mass transfer between the bulk gas and the catalyst’s surface was neglected due to the relatively low gas velocity. For the catalytic surface reaction, the Langmuir–Hinshelwood model was incorporated in which methane (CH4) is reformed to hydrogen-rich gases by the autothermal reforming (ATR) reaction. Full combustion, steam reforming, water-gas shift, and direct steam reforming reactions were included in the chemical reaction model. Mass, momentum, energy, and species balance equations were simultaneously calculated with the chemical reactions for the multiphysics analysis. By varying the four operating conditions (inlet temperature, oxygen to carbon ratio (OCR), steam to carbon ratio, and gas hourly space velocity (GHSV)), the performance of the ATR reactor was estimated by the numerical calculations. The SR reaction rate was improved by an increased inlet temperature. The reforming efficiency and the fuel conversion reached their maximum values at an OCR of 0.7. When the GHSV was increased, the reforming efficiency increased but the large pressure drop may decrease the system efficiency. From these results, we can estimate the optimal operating conditions for the production of large amounts of hydrogen from methane.

Bi-wetting property of oil sands fine solids determined by film flotation and water vapor adsorption

Fuel ◽  
2017 ◽  
Vol 197 ◽  
pp. 326-333 ◽  
Author(s):  
Cheng Wang ◽  
Qi Liu ◽  
Douglas G. Ivey ◽  
Thomas H. Etsell
Keyword(s):  
Water Vapor ◽  
Oil Sands ◽  
Water Vapor Adsorption ◽  
Vapor Adsorption ◽  
Wetting Property

Heat Transfer on Nanofluid Flow With Homogeneous–Heterogeneous Reactions and Internal Heat Generation

2014 ◽  
Vol 136 (12) ◽  
Author(s):  
Raj Nandkeolyar ◽  
Peri K. Kameswaran ◽  
Sachin Shaw ◽  
Precious Sibanda
Keyword(s):  
Heat Transfer ◽  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Heat Generation ◽  
Internal Heat ◽  
Internal Heat Generation ◽  
Heterogeneous Reactions ◽  
Transfer Coefficients ◽  
Transfer Characteristics ◽  
Fluid Properties

We investigated heat and mass transfer on water based nanofluid due to the combined effects of homogeneous–heterogeneous reactions, an external magnetic field and internal heat generation. The flow is generated by the movement of a linearly stretched surface, and the nanofluid contains nanoparticles of copper and gold. Exact solutions of the transformed model equations were obtained in terms of hypergeometric functions. To gain more insights regarding subtle impact of fluid and material parameters on the heat and mass transfer characteristics, and the fluid properties, the equations were further solved numerically using the matlab bvp4c solver. The similarities and differences in the behavior, including the heat and mass transfer characteristics, of the copper–water and gold–water nanofluids with respect to changes in the flow parameters were investigated. Finally, we obtained the numerical values of the skin friction and heat transfer coefficients.

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