Browsing SINTEF Open by Author "Amini, Shahriar"
Now showing items 1-20 of 65
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1D modelling of membrane-assisted chemical looping reforming
Francisco Morgado, Joana; Cloete, Schalk Willem Petrus; Morud, John; Gurker, Thomas; Quinta-Ferreira, Rosa; Amini, Shahriar (Peer reviewed; Journal article, 2017)Membrane-assisted chemical looping reforming (MA-CLR) has been proposed as an alternative to the conventional CLR technology. In this work, a non-isothermal 1D model is used to simulate the MA-CLR fuel reactor. The effect ... -
A MULTI-DOMAIN 1D PARTICLE-REACTOR MODEL FOR PACKED BED REACTOR REACTOR APPLICATIONS
Tabib, Mandar; Cloete, Schalk Willem Petrus; Morud, John; Lysberg, Magne; Amini, Shahriar (Chapter, 2017)A validated multi-domain 1D particle-reactor model has been developed to simulate packed bed reactor operation. Two main components of the model are: (1) a particle model for simulating the radial distribution of chemical ... -
A multi-scale model for oxygen carrier selection and reactor design applied to packed bed chemical looping combustion
Tabib, Mandar; Morud, John; Johansen, Stein Tore; Amini, Shahriar (SINTEF Proceedings;1, Chapter, 2015)Proper selection of a catalyst shape (or a particle shape) can improve the performance of a gas-solid packed bed reactor. The particle shape affects the packing structure and the transport phenomena within the packed bed. ... -
A multi‐domain 1D particle‐reactor model for packed bed reactor applications
Tabib, Mandar; Cloete, Schalk; Morud, John; Lysberg, Magne; Amini, Shahriar (SINTEF Proceedings;2, Chapter; Conference object; Peer reviewed, 2017)A validated multi-domain 1D particle-reactor model has been developed to simulate packed bed reactor operation. Two main components of the model are: (1) a particle model for simulating the radial distribution of chemical ... -
An advancement in CO2 utilization through novel gas switching dry reforming
Ugwu, Ambrose; Zaabout, Abdelghafour; Amini, Shahriar (Peer reviewed; Journal article, 2019)This study is the first experimental demonstration of CO2 capture and utilization for dry methane reforming using a novel chemical looping concept, “Gas Switching Dry Reforming” (GSDR) to produce syngas. The new reactor ... -
Analysis of Combined Cycle Power Plants with Chemical Looping Reforming of Natural Gas and Pre-Combustion CO2 Capture
Nazir, Shareq Mohd; Bolland, Olav; Amini, Shahriar (Journal article; Peer reviewed, 2018)In this paper, a gas-fired combined cycle power plant subjected to a pre-combustion CO2 capture method has been analysed under different design conditions and different heat integration options. The power plant configuration ... -
An assessment of the ability of computational fluid dynamic models to predict reactive gas-solid flows in a fluidized bed
Cloete, Schalk; Johansen, Stein Tore; Amini, Shahriar (Peer reviewed; Journal article, 2012)Fine grid, two dimensional simulations of reactive gas–solid flows occurring in a fluidized bed reactor were carried out using the Eulerian multi-fluid kinetic theory of granular flow (KTGF) approach in the commercial flow ... -
Carbon Capture Utilization and Storage in Methanol Production Using a Dry Reforming-Based Chemical Looping Technology
Ugwu, Ambrose; Osman, Mogahid; Zaabout, Abdelghafour; Amini, Shahriar (Peer reviewed; Journal article, 2022)This further investigates the concept of gas switching dry reforming (GSDR) that efficiently converts the two major greenhouse gases (CO2 and CH4) into a valuable product (syngas) for gas-to-liquid (GTL) syntheses. The ... -
Combined Syngas and Hydrogen Production using Gas Switching Technology
Ugwu, Ambrose; Zaabout, Abdelghafour; Donat, Felix; van Diest, Geert; Albertsen, Knuth; Müller, Christoph; Amini, Shahriar (Peer reviewed; Journal article, 2021)This paper focuses on the experimental demonstration of a three-stage GST (gas switching technology) process (fuel, steam/CO2, and air stages) for syngas production from methane in the fuel stage and H2/CO production in ... -
COMPARISON OF PARTICLE-RESOLVED DIRECT NUMERICAL SIMULATION AND 1D MODELLING OF CATALYTIC REACTIONS IN A PACKED BED
Singhal, Arpit; Cloete, Schalk Willem Petrus; Radl, Stefan; Quinta-Ferreira, Roas; Amini, Shahriar (Chapter, 2017)The work presents a comparison of catalytic gas-solid reactions in a packed bed as simulated on two widely different scales: direct numerical simulation (capable of accurately predicting transfer phenomena in and around a ... -
Comparison of particle‐resolved direct numerical simulation and 1D modelling of catalytic reactions in a packed bed
Singhal, Arpit; Cloete, Schalk; Radi, Stefan; Quinta-Ferreira, Rosa; Amini, Shahriar (SINTEF Proceedings;2, Chapter; Conference object; Peer reviewed, 2017)The work presents a comparison of catalytic gas-solid reactions in a packed bed as simulated on two widely different scales: direct numerical simulation (capable of accurately predicting transfer phenomena in and around a ... -
Comparison of phenomenological and fundamental modelling approaches for predicting fluidized bed reactor performance
Cloete, Schalk; Zaabout, Abdelghafour; Johansen, Stein Tore; Amini, Shahriar (Peer reviewed; Journal article, 2012)Two approaches to modelling fluidized bed reactors were evaluated and compared in this work: a phenomenological 1D approach based on empirical closures and a more fundamental 2D approach based on computational fluid dynamics ... -
COMPOSITE: A concept for high efficiency power production with integrated CO2 capture from solid fuels
Larring, Yngve; Cloete, Schalk Willem Petrus; Giuffrida, Antonio; Romano, Matteo C.; Chiesa, Paolo; Morud, John; Pishahang, Mehdi; Chikukwa, Actor; Amini, Shahriar; Tobiesen, Finn Andrew (Peer reviewed; Journal article, 2017)The COMPOSITE concept combines packed bed chemical looping combustion (PBCLC) with chemical looping for oxygen production (CLOP) in an integrated gasification combined cycle for high efficiency power production. Detailed ... -
Cost-effective clean ammonia production using membrane-assisted autothermal reforming
Cloete, Schalk Willem Petrus; Kahn, Mohammed Nazeer; Nazir, Shareq Mohd; Amini, Shahriar (Peer reviewed; Journal article, 2020)Ammonia is a widely produced industrial chemical, primarily for use in the fertilizer industry. Recently, interest has also grown in ammonia as a carbon-free energy carrier because it is easier to store and transport than ... -
Economic assessment of membrane-assisted autothermal reforming for cost effective hydrogen production with CO 2 capture
Cloete, Schalk Willem Petrus; Khan, Mohammed Nazeer Ul Hasan; Amini, Shahriar (Peer reviewed; Journal article, 2019)A recent techno-economic study (Spallina et al., Energy Conversion and Management 120: p. 257–273) showed that the membrane assisted chemical looping reforming (MA-CLR) technology can produce H2 with integrated CO2 capture ... -
The effect of frictional pressure, geometry and wall friction on the modelling of a pseudo-2D bubbling fluidised bed reactor
Cloete, Schalk Willem Petrus; Johansen, Stein Tore; Zaabout, Abdelghafour; van Sint Annaland, Martin; Gallucci, Fausto; Amini, Shahriar (Peer reviewed; Journal article, 2015)The two fluid model (TFM) closed by the kinetic theory of granular flows (KTGF) has been developed to a high level of maturity over the past three decades. However, significant uncertainties still remain about the influence ... -
Efficiency Improvement of Chemical Looping Combustion Combined Cycle Power Plants
Khan, Mohammed Nazeer Ul Hasan; Cloete, Schalk Willem Petrus; Amini, Shahriar (Journal article; Peer reviewed, 2019)Chemical‐looping combustion (CLC) is an innovative technology for power production with inherent carbon dioxide (CO2) capture. Even though CLC imposes no direct energy penalty for CO2 capture, previous works have shown ... -
Efficient hydrogen production with CO2 capture using gas switching reforming
Nazir, Shareq Mohd; Cloete, Jan Hendrik; Cloete, Schalk Willem Petrus; Amini, Shahriar (Journal article; Peer reviewed, 2019)Hydrogen is a promising carbon-neutral energy carrier for a future decarbonized energy sector. This work presents process simulation studies of the gas switching reforming (GSR) process for hydrogen production with integrated ... -
Efficient hydrogen production with CO2 capture using gas switching reforming (GSR): Technoeconomic assessment
Nazir, Shareq Mohd; Cloete, Jan Hendrik; Cloete, Schalk Willem Petrus; Amini, Shahriar (Chapter, 2019)Hydrogen is identified as one of the clean energy carriers in the future energy scenario. This work presents a process to produce low cost hydrogen with CO2 capture using gas switching reforming (GSR). The process steps ... -
Efficient Production of Clean Power and Hydrogen Through Synergistic Integration of Chemical Looping Combustion and Reforming
Khan, Mohammed Nazeer Ul Hasan; Cloete, Schalk Willem Petrus; Amini, Shahriar (Peer reviewed; Journal article, 2020)Chemical looping combustion (CLC) technology generates power while capturing CO2 inherently with no direct energy penalty. However, previous studies have shown significant energy penalties due to low turbine inlet temperature ...