scholarly journals Modeling and simulation of fixed bed regenerators for a multi-tower decoupled advanced solar combined cycle

2017 ◽  
Author(s):  
Iván Mesonero ◽  
Jesús Febres ◽  
Susana López Pérez
Keyword(s):  
Modeling And Simulation ◽  
Fixed Bed ◽  
Combined Cycle

Investigation of a Novel Gas Turbine Cycle With Coal Gas Fueled Chemical-Looping Combustion

2000 ◽  
Author(s):  
Hongguang Jin ◽  
Masaru Ishida
Keyword(s):  
Natural Gas ◽  
Fixed Bed ◽  
Combined Cycle ◽  
Fixed Bed Reactor ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Gas Combustion ◽  
Coal Gas ◽  
New Type ◽  
Oxidation Reactor

Abstract A new type of integrated gasification combined cycle (IGCC) with chemical-looping combustion and saturation for air is proposed and investigated. Chemical-looping combustion may be carried out in two successive reactions between two reactors, a reduction reactor (coal gas with metal oxides) and an oxidation reactor (the reduced metal with oxygen in air). The study on the new system has revealed that the thermal efficiency of this new-generation power plant will be increased by approximately 10–15 percentage points compared to the conventional IGCC with CO2 recovery. Furthermore, to develop the chemical-looping combustor, we have experimentally examined the kinetic behavior between solid looping materials and coal gas in a high-pressure fixed bed reactor. We have identified that the coal gas chemical-looping combustor has much better reactivity, compared to the natural gas one. This finding is completely different from the direct combustion in which combustion with natural gas is much easier than that with other fuels. Hence, this new type of coal gas combustion will make breakthrough in clean coal technology by simultaneously resolving energy and environment problems.

Optimal Design, Modeling and Simulation of an Ethanol Steam Reforming Reactor

2009 ◽  
Vol 7 (1) ◽  
Author(s):  
Luis E Arteaga ◽  
Luis M Peralta ◽  
Yannay Casas ◽  
Daikenel Castro
Keyword(s):  
Hydrogen Production ◽  
Modeling And Simulation ◽  
Design Patterns ◽  
Plug Flow ◽  
Fixed Bed ◽  
Cell System ◽  
Fixed Bed Reactor ◽  
Effect Of Temperature ◽  
Ethanol Conversion ◽  
Renewable Hydrogen

The optimum design, modeling and simulation of a fixed bed multi-tube reformer for the renewable hydrogen production are carried out in the present paper. The analogies between plug flow model and a fixed bed reactor are used as design patterns. The steam reformer is designed to produce enough hydrogen to feed a 200kW fuel cell system (>2.19molH/s) and considering 85% of fuel utilization in the cell electrodes. The reactor prototype is optimized and then analyzed using a multiphysics and axisymmetric model, implemented on FEMLABM(R) where the differential mass balance by convection-diffusion and the energy balance for convection-conduction are solved. The temperature profile is controlled to maximize hydrogen production. The catalyst bed internal profiles and the effect of temperature on ethanol conversion and carbon monoxide production are discussed as well.

scholarly journals Technical Evaluation of Simplified IGCC Components

1985 ◽  
Author(s):  
M. W. Horner ◽  
R. K. Alff ◽  
J. C. Corman
Keyword(s):  
Gas Turbine ◽  
Power Plants ◽  
Fixed Bed ◽  
Exhaust System ◽  
Pilot Scale ◽  
Combined Cycle ◽  
Fuel Gas ◽  
Capital Costs ◽  
Coal Gas ◽  
Hot Gas

Simplified integrated gasification combined cycle (IGCC) power plants offer attractive advantages for improving the performance of coal to electricity systems. This plant configuration, which utilizes a coal gasifier, hot gas cleanup system, and gas turbine combined cycle, has the potential to reduce both capital costs for equipment and fuel costs through improved efficiency. This paper reports the results of fuel supply and gas turbine testing on actual hot low-Btu coal gas. A pilot-scale advanced fixed-bed gasifier has been modified to supply hot coal gas to a particulate removal cyclone and then to a gas turbine simulator. The hot gas is combusted in a General Electric MS6000 combustor developed for low-Btu gas fuel. The combusted product flows through a MS6000 turbine first-stage nozzle sector. The exhaust gases from the nozzle sector pass over air-cooled cylindrical ash deposition pin specimens and then into a water quench exhaust system. Extensive instrumentation and sampling provisions are utilized to characterize the fuel gas, the combustion gases, and the ash deposits formed on turbine components. Two regimes of nozzle metal surface temperatures have been investigated by separate testing performed including 500–600 °F with water-cooled and 1500–1650 °F with air-cooled nozzle sectors. Results from the test program have provided key data related to fuel gas cleanup and the tolerance of gas turbine hot gas path parts to the products of combustion from coal-derived fuels.

Start-and-Stop Operation of Fixed-Bed Methanation Reactors - Results from Modeling and Simulation

2017 ◽  
Vol 40 (12) ◽  
pp. 2314-2321 ◽  
Author(s):  
Stefan Rönsch ◽  
Andreas Ortwein ◽  
Sebastian Dietrich
Keyword(s):  
Modeling And Simulation ◽  
Fixed Bed

Biomass Utilization in Dual Combustion Gas Turbines for Distributed Power Generation in Mediterranean Countries

2011 ◽  
Author(s):  
Sergio Mario Camporeale ◽  
Bernardo Fortunato ◽  
Antonio Marco Pantaleo ◽  
Domenico Sciacovelli
Keyword(s):  
Power Plant ◽  
Natural Gas ◽  
Gas Turbines ◽  
Fixed Bed ◽  
Combined Cycle ◽  
Biomass Energy ◽  
Inlet Temperature ◽  
Optimal Size ◽  
Direct Combustion ◽  
Mediterranean Countries

In Mediterranean regions, such as Puglia in Italy, the supply chain constraints (i.e. local biomass availability, logistics of supply, storage and seasonality issues) limit the optimal size of a biomass fired power plant in a range of 5–15 MWe. In this scenario, innovative Dual Combustion Externally Fired Gas Turbine (DCGT) Power Plants cofired by natural gas and biomass are examined. For this purpose, biomass external firing is explored under two alternatives: direct combustion of solid biomass and atmospheric fixed bed biomass gasification with air. The proposed cycles are analyzed considering both the Net Overall Electric Efficiency and the Marginal Efficiency of biomass energy conversion, defined for the cofiring of biomass and natural gas. Since natural gas represents a quite expensive fossil fuel resource, a Marginal Efficiency higher than zero indicates the convenience to burn natural gas in this typology of power plant rather than in traditional Combined Cycle with higher efficiency. The energy analysis has been carried out by varying pressure ratio, turbine inlet temperature, heat exchanger efficiency and considering the further option of steam injection. The results of the thermodynamic assessment highlight that the gasification should be preferred to the direct combustion of biomass because of the higher marginal efficiency, although the net overall electric efficiencies of the two plants are almost the same (31%).

scholarly journals Computational Fluid Dynamic Modeling and Simulation of Hydrocracking of Vacuum Gas Oil in a Fixed-Bed Reactor

ACS Omega ◽  
2020 ◽  
Vol 5 (27) ◽  
pp. 16595-16601 ◽  
Author(s):  
Davood Faraji ◽  
Samyar Zabihi ◽  
Mahdi Ghadiri ◽  
Sepehr Sadighi ◽  
Ali Taghvaie Nakhjiri ◽  
...  
Keyword(s):  
Modeling And Simulation ◽  
Dynamic Modeling ◽  
Computational Fluid Dynamic ◽  
Fluid Dynamic ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Vacuum Gas Oil ◽  
Gas Oil ◽  
Computational Fluid Dynamic Modeling

gPROMS-driven modeling and simulation of fixed bed adsorption of heavy metals on a biosorbent: benchmarking and case study

2021 ◽  
Author(s):  
Mohd Danish ◽  
Khursheed B. Ansari ◽  
Rameez Ahmad Aftab ◽  
Mohammad Danish ◽  
Sadaf Zaidi ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Modeling And Simulation ◽  
Fixed Bed ◽  
Fixed Bed Adsorption
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