Case Study

2018 ◽  
pp. 216-241
Author(s):  
Maria do Carmo Rangel ◽  
Amalia Luz Costa Pereira ◽  
Gustavo Marchetti ◽  
Peterson Santos Querino ◽  
Alberto Albornoz
Keyword(s):  
Specific Surface ◽  
Tetragonal Zirconia ◽  
Water Gas Shift ◽  
Intrinsic Activity ◽  
Pure Hydrogen ◽  
Surface Areas ◽  
Specific Surface Areas ◽  
Shift Reaction ◽  
Water Gas

The effect of zirconium on the textural and catalytic properties of magnetite for the water gas shift reaction (WGSR) at high temperatures was studied in this chapter. The reaction is an important step in the industrial production of pure hydrogen. Samples with different amounts of zirconium (Zr/Fe (molar)= 0.1; 0.2;0.3; 0.4 and 0.5) were prepared from the decomposition of iron(III)hydroxoacetate doped with zirconium. It was found that zirconium increased the specific surface area of magnetite acting as spacer on the surface where it keeps the particles apart. Except for the zirconium-poorest solid, tetragonal zirconia was detected besides magnetite for all solids. Zirconium increased the intrinsic activity of the catalysts, stabilized the specific surface areas during reaction, and made the magnetite reduction to metallic iron more difficult. The zirconium-poorest is more active than magnetite and more resistant against deactivation by sintering and overreduction being attractive for WGSR.

Influence of the monoclinic and tetragonal zirconia phases on the water gas shift reaction. A theoretical study

2013 ◽  
Vol 19 (7) ◽  
pp. 2885-2891 ◽  
Author(s):  
María Luisa Cerón ◽  
Barbara Herrera ◽  
Paulo Araya ◽  
Francisco Gracia ◽  
Alejandro Toro-Labbé
Keyword(s):  
Theoretical Study ◽  
Tetragonal Zirconia ◽  
Water Gas Shift ◽  
Water Gas Shift Reaction ◽  
Shift Reaction ◽  
Water Gas

Viability of Au/CeO2-ZnO/Al2O3Catalysts for Pure Hydrogen Production by the Water-Gas Shift Reaction

ChemCatChem ◽  
2014 ◽  
pp. n/a-n/a ◽  
Author(s):  
Tomás Ramírez Reina ◽  
Svetlana Ivanova ◽  
Juan José Delgado ◽  
Ivan Ivanov ◽  
Vasko Idakiev ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Water Gas Shift ◽  
Pure Hydrogen ◽  
Water Gas Shift Reaction ◽  
Shift Reaction ◽  
Water Gas

Selecting Robust Kinetic Models on Noisy Data Using the Bootstrap

2007 ◽  
Vol 5 (1) ◽  
Author(s):  
Cayle J Sharrock ◽  
Roelof Coetzer
Keyword(s):  
Systematic Approach ◽  
Exploratory Data Analysis ◽  
Noisy Data ◽  
Water Gas Shift ◽  
Industrial Case Study ◽  
Analysis Techniques ◽  
Exploratory Data ◽  
Shift Reaction ◽  
Water Gas

A systematic approach to identifying a robust kinetic model fitted on noisy data is presented. The bootstrap coupled with Monte-Carlo simulations and exploratory data analysis techniques are employed to evaluate candidate model formulations to given sets of experimental data. The approach is applied in an industrial case study in determining the most practical rate expression for the water-gas shift reaction over a cobalt Fischer-Tropsch catalyst.

scholarly journals Efficient Waste to Energy Conversion Based on Co-CeO2 Catalyzed Water-Gas Shift Reaction

Catalysts ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 420 ◽  
Author(s):  
Kyoung-Jin Kim ◽  
Yeol-Lim Lee ◽  
Hyun-Suk Na ◽  
Seon-Yong Ahn ◽  
Jae-Oh Shim ◽  
...  
Keyword(s):  
Sol Gel ◽  
Space Velocity ◽  
Physicochemical Characteristics ◽  
Waste To Energy ◽  
Water Gas Shift ◽  
Pure Hydrogen ◽  
Gel Method ◽  
Sol Gel Method ◽  
Shift Reaction ◽  
Water Gas

Waste to energy technology is attracting attention to overcome the upcoming environmental and energy issues. One of the key-steps is the water-gas shift (WGS) reaction, which can convert the waste-derived synthesis gas (H2 and CO) to pure hydrogen. Co–CeO2 catalysts were synthesized by the different methods to derive the optimal synthetic method and to investigate the effect of the preparation method on the physicochemical characteristics of Co–CeO2 catalysts in the high-temperature water-gas shift (HTS) reaction. The Co–CeO2 catalyst synthesized by the sol-gel method featured a strong metal to support interaction and the largest number of oxygen vacancies compared to other catalysts, which affects the catalytic activity. As a result, the Co–CeO2 catalyst synthesized by the sol-gel method exhibited the highest WGS activity among the prepared catalysts, even in severe conditions (high CO concentration: ~38% in dry basis and high gas hourly space velocity: 143,000 h−1).

Process Development for Hydrogen Production via Water-Gas Shift Reaction Using Aspen HYSYS

2017 ◽  
Vol 30 ◽  
pp. 144-153 ◽  
Author(s):  
Idowu Iyabo Olateju ◽  
Crowei Gibson-Dick ◽  
Steve Chidinma Oluwatomi Egede ◽  
Abdulwahab Giwa
Keyword(s):  
Process Development ◽  
Volume Fraction ◽  
Water Gas Shift ◽  
Process Equipment ◽  
Pure Hydrogen ◽  
Water Gas Shift Reaction ◽  
Aspen Hysys ◽  
Production Of Hydrogen ◽  
Shift Reaction ◽  
Water Gas

The development of a process for the production of hydrogen through water-gas shift reaction has been developed and simulated in this work using Aspen HYSYS. This was achieved by picking the pieces of process equipment of the plant from the appropriate section of the Aspen HYSYS environment and connecting them together through appropriate streams. In addition, the components involved in the process were selected from the Aspen HYSYS databank. Peng-Robinson Stryjek-Vera (PRSV) was used as the fluid package of the developed process for property estimation during the simulation. The reaction of the process was modelled as an equilibrium type, the equilibrium constant of which was estimated using Gibbs Free Energy. From the results obtained, it has been established that pure hydrogen can be obtained from a plant comprising of a mixer, a reactor (with approximately 80.07% conversion of the reactants), a separator and two heat exchangers based on the fact that the mole fraction, the mass fraction and the volume fraction of hydrogen obtained from the simulation carried out when carbon monoxide and steam were passed into the process plant at room temperature (25 °C) and boiling temperature of water (100 °C), respectively under atmospheric pressure was approximately 1.

Water Gas Shift Reaction in Pd-Based Membrane Reactors

2010 ◽  
Vol 72 ◽  
pp. 99-104 ◽  
Author(s):  
Angelo Basile ◽  
Pietro Pinacci ◽  
Silvano Tosti ◽  
Marcello De Falco ◽  
Claudio Evangelisti ◽  
...  
Keyword(s):  
Pem Fuel Cells ◽  
Membrane Reactors ◽  
Water Gas Shift ◽  
Molar Ratio ◽  
Pure Hydrogen ◽  
Temperature Reaction ◽  
Water Gas Shift Reaction ◽  
Operating Variables ◽  
Shift Reaction ◽  
Water Gas

Water-gas shift reaction is an important industrial reaction, used for producing synthesis gas and ammonia as well as pure hydrogen for supplying at PEM fuel cells. In this work, an overview on water gas shift reaction performed in Pd-based membrane reactors is shown, paying particular attention to the influence on the performances of some operating variables such as reaction temperature, reaction pressure, H2O/CO molar ratio and sweep gas.

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