Reduced-Order Modeling (ROM) of a Segmented Plug-Flow Reactor (PFR) for Hydrogen Separation in Integrated Gasification Combined Cycles (IGCC) DOI Open Access
Osama A. Marzouk

Processes, Journal Year: 2025, Volume and Issue: 13(5), P. 1455 - 1455

Published: May 9, 2025

In an integrated gasification combined cycle (IGCC), a process produces gas stream from solid fuel, such as coal or biomass. This (syngas synthesis gas) resulting the contains carbon monoxide, molecular hydrogen, and dioxide (other gaseous components may also be present depending on gasified fuel gasifying agent). Separating hydrogen this syngas has advantages. One of methods to separate is selective permeation through palladium-based metal membrane. separation complicated it depends nonlinearly various variables. Thus, desirable develop simplified reduced-order model (ROM) that can rapidly estimate performance under operational conditions, preliminary stage computer-aided engineering (CAE) in chemical processes sustainable industrial operations. To fill gap, we here proposed procedure for one-dimensional steady plug-flow reactor (PFR) use investigate membrane (MR), produced (IGCC). model, (a feed stream) enters one side into retentate zone, while nitrogen sweep opposite neighbor permeate zone. The two zones are separated by permeable palladium surfaces selectively hydrogen. After analyzing profile base case (300 °C uniform temperature, 40 atm absolute pressure, 20 pressure), temperature module, retentate-side permeate-side pressure varied individually their influence investigated. all simulation cases, fixed targets 95% recovery 40% mole-fraction at exit demanded. module length allowed change order satisfy these targets. Other dependent permeation-performance variables investigated include logarithmic mean pressure-square-root difference, apparent permeance, efficiency factor permeation. contributions our study linked fields applications, production, gasification, analytical modeling, numerical analysis. addition separation, linear nonlinear regression models derived obtained results. work gives general insights via membranes (MR). For example, most effective improve performance. Increasing value 120 results proportional gain permeated mass flux, with about 0.05 kg/m2.h gained per 1 increase decreasing bar 0.2 causes flux exponentially 1.15 kg/m2.h. 5.11 United Nations Sustainable Development Goal (SDG) numbers 7, 9, 11, 13.

Language: Английский

Power Density and Thermochemical Properties of Hydrogen Magnetohydrodynamic (H2MHD) Generators at Different Pressures, Seed Types, Seed Levels, and Oxidizers DOI Creative Commons
Osama A. Marzouk

Hydrogen, Journal Year: 2025, Volume and Issue: 6(2), P. 31 - 31

Published: May 2, 2025

Hydrogen and some of its derivatives (such as e-methanol, e-methane, e-ammonia) are promising energy carriers that have the potential to replace conventional fuels, thereby eliminating their harmful environmental impacts. An innovative use hydrogen a zero-emission fuel is forming weakly ionized plasma by seeding combustion products with small amount an alkali metal vapor (cesium or potassium). This formed can be used working fluid in supersonic open-cycle magnetohydrodynamic (OCMHD) power generators. In these OCMHD generators, direct-current (DC) electricity generated straightforwardly without rotary turbogenerators. current study, we quantitatively qualitatively explore levels electric conductivity resultant volumetric output density typical channel, where thermal equilibrium accelerated at Mach number two (Mach 2) while being subject strong applied magnetic field (applied magnetic-field flux density) five teslas (5 T), temperature 2300 K (2026.85 °C). We varied total pressure pre-ionization seeded gas mixture between 1/16 atm 16 atm. also seed level 0.0625% 16% (pre-ionization mole fraction). type cesium potassium. oxidizer air (oxygen–nitrogen mixture, 21–79% mole) pure oxygen. Our results suggest ideal reach exceptional beyond 1000 MW/m3 (or 1 kW/cm3) provided absolute reduced about 0.1 only for rather than Under atmospheric air–hydrogen (1 pressure) 1% fraction vapor, theoretical 410.828 case 104.486 The enhanced using any following techniques: (1) reducing pressure, (2) instead potassium seeding, (3) oxygen (if unchanged). A 4% fraction) recommended. Much lower much higher may harm performance. maximizes not necessarily same conductivity, this due additional thermochemical changes caused additive seed. For example, combustion, maximized 6% fraction, 5%. present comprehensive set computed properties gases, such molecular weight speed sound.

Language: Английский

Citations

0
Reduced-Order Modeling (ROM) of a Segmented Plug-Flow Reactor (PFR) for Hydrogen Separation in Integrated Gasification Combined Cycles (IGCC) DOI Open Access
Osama A. Marzouk

Processes, Journal Year: 2025, Volume and Issue: 13(5), P. 1455 - 1455

Published: May 9, 2025

In an integrated gasification combined cycle (IGCC), a process produces gas stream from solid fuel, such as coal or biomass. This (syngas synthesis gas) resulting the contains carbon monoxide, molecular hydrogen, and dioxide (other gaseous components may also be present depending on gasified fuel gasifying agent). Separating hydrogen this syngas has advantages. One of methods to separate is selective permeation through palladium-based metal membrane. separation complicated it depends nonlinearly various variables. Thus, desirable develop simplified reduced-order model (ROM) that can rapidly estimate performance under operational conditions, preliminary stage computer-aided engineering (CAE) in chemical processes sustainable industrial operations. To fill gap, we here proposed procedure for one-dimensional steady plug-flow reactor (PFR) use investigate membrane (MR), produced (IGCC). model, (a feed stream) enters one side into retentate zone, while nitrogen sweep opposite neighbor permeate zone. The two zones are separated by permeable palladium surfaces selectively hydrogen. After analyzing profile base case (300 °C uniform temperature, 40 atm absolute pressure, 20 pressure), temperature module, retentate-side permeate-side pressure varied individually their influence investigated. all simulation cases, fixed targets 95% recovery 40% mole-fraction at exit demanded. module length allowed change order satisfy these targets. Other dependent permeation-performance variables investigated include logarithmic mean pressure-square-root difference, apparent permeance, efficiency factor permeation. contributions our study linked fields applications, production, gasification, analytical modeling, numerical analysis. addition separation, linear nonlinear regression models derived obtained results. work gives general insights via membranes (MR). For example, most effective improve performance. Increasing value 120 results proportional gain permeated mass flux, with about 0.05 kg/m2.h gained per 1 increase decreasing bar 0.2 causes flux exponentially 1.15 kg/m2.h. 5.11 United Nations Sustainable Development Goal (SDG) numbers 7, 9, 11, 13.

Language: Английский

Citations

0