Modeling of an ammonia decomposition membrane reactor including purity with complex geometry and non-isothermal behavior

Lundin, Sean-Thomas B.; Movick, William J.; Ikeda, Ayumi; Hasegawa, Yasuhisa; Wolden, Colin A.; Way, J. Douglas

doi:10.1016/j.memsci.2023.122345

Cited by 4 publications

(2 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CFD simulations for ammonia decomposition have already been investigated in the literature, e.g., in [6,[20][21][22]. Also, the potential of combining multiple simulation scales for process simulation has already been studied in [23][24][25], where it was shown that this approach leads to improved simulation results.…”

Section: Introductionmentioning

confidence: 99%

Multi‐Scale Simulation of a Novel Integrated Reactor for Hydrogen Production by Ammonia Decomposition

Blauth,

Damay,

Osterroth

et al. 2024

Chemie Ingenieur Technik

View full text Add to dashboard Cite

A novel reactor concept for ammonia decomposition utilizing tail gas from a purification unit as heat supply is presented. The designed micro‐structured reactor integrates both endothermic ammonia decomposition and exothermic tail gas combustion. The reactor and corresponding process are simulated using a mathematical multi‐scale model, which combines the results of multiple detailed computational fluid dynamics simulations into a fast surrogate model. The latter is coupled with a process simulation software via a so‐called container to simulate the entire process. The efficiency of the presented reactor concept is determined and benefits over alternative approaches are highlighted.

show abstract

Section: Introductionmentioning

confidence: 99%

Multi‐Scale Simulation of a Novel Integrated Reactor for Hydrogen Production by Ammonia Decomposition

Blauth,

Damay,

Osterroth

et al. 2024

Chemie Ingenieur Technik

View full text Add to dashboard Cite

show abstract

“…Concentration polarization is the phenomenon of reduced concentration near the membrane surface that results in reduced effective permeance due to non-idealities arising from the convective and diffusive transport. Several modeling studies have explored these effects, with the requirement of a 2D or 3D geometry to model the diffusion effects perpendicular to the convective flow [ 12 , 13 , 14 ]. Concentration polarization is increasingly significant at higher permeances, but some techniques can reduce the effects.…”

Section: Introductionmentioning

confidence: 99%

On the Maximum Obtainable Purity and Resultant Maximum Useful Membrane Selectivity of a Membrane Separator

Lundin,

Ikeda,

Hasegawa

2024

Membranes

Self Cite

View full text Add to dashboard Cite

Design considerations concerning the maximum purity of a membrane separator, and the resultant maximum effective selectivity of the membranes were explored by modeling a binary gas membrane separator (pressure-driven permeance) using a dimensionless form. Although the maximum purity has an analytical solution at the limit of zero recovery or stage cut, this solution over-predicts the obtained purity as the recovery is increased. Furthermore, at combinations of high recovery, low feed mole fraction, and low pressure ratio, the maximum purity becomes independent of selectivity above some critical selectivity. As a consequence of this purity limitation, a maximum selectivity is defined at which further increases in selectivity will result in less than a 1% change in the final purity. An equation is obtained that specifies the region in which a limiting purity is less than unity (indicating the existence of a limiting selectivity); operating at less than the limiting pressure ratio results in a purity limitation less than unity. This regime becomes larger and more significant as the inlet mole fraction decreases (e.g., inlet feed mole fraction of 10% and pressure ratio of 100 results in a maximum useful membrane selectivity of only 130 at 95% recovery). These results suggest that membrane research should focus on increasing permeance rather than selectivity for low-concentration separations. The results found herein can be used to set benchmarks for membrane development in various gas separation applications.

show abstract

Feasibility of new energy hybrid vehicles that use ammonia as the primary source of energy

Huo,

Li,

Zheng

et al. 2024

Energy Conversion and Management

View full text Add to dashboard Cite

Modeling of an ammonia decomposition membrane reactor including purity with complex geometry and non-isothermal behavior

Cited by 4 publications

References 58 publications

Multi‐Scale Simulation of a Novel Integrated Reactor for Hydrogen Production by Ammonia Decomposition

Multi‐Scale Simulation of a Novel Integrated Reactor for Hydrogen Production by Ammonia Decomposition

On the Maximum Obtainable Purity and Resultant Maximum Useful Membrane Selectivity of a Membrane Separator

Feasibility of new energy hybrid vehicles that use ammonia as the primary source of energy

Contact Info

Product

Resources

About