Design and simulation of a solar chemical reactor for the thermal reduction of metal oxides: Case study of zinc oxide dissociation

2007 ◽  
Vol 62 (22) ◽  
pp. 6323-6333 ◽  
Author(s):  
Stéphane Abanades ◽  
Patrice Charvin ◽  
Gilles Flamant
Keyword(s):  
Zinc Oxide ◽  
Metal Oxides ◽  
Chemical Reactor ◽  
Thermal Reduction ◽  
Reduction Of Metal Oxides

Application of an Internally Circulating Fluidized Bed for Windowed Solar Chemical Reactor with Direct Irradiation of Reacting Particles

2008 ◽  
Vol 130 (1) ◽  
Author(s):  
Tatsuya Kodama ◽  
Syu-ichi Enomoto ◽  
Tsuyoshi Hatamachi ◽  
Nobuyuki Gokon
Keyword(s):  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Chemical Reactor ◽  
Thermal Reduction ◽  
Storage Efficiency ◽  
Solar Reactor ◽  
Direct Irradiation ◽  
Thermochemical Processes ◽  
Reactor Operating ◽  
Reduction Of Metal Oxides

Solar thermochemical processes require the development of a high-temperature solar reactor operating at 1000–1500°C, such as solar gasification of coal and the thermal reduction of metal oxides as part of a two-step water splitting cycle. Here, we propose to apply “an internally circulating fluidized bed” for a windowed solar chemical reactor in which reacting particles are directly illuminated. The prototype reactor was constructed in a laboratory scale and demonstrated on CO2 gasification of coal coke using solar-simulated, concentrated visible light from a sun simulator as the energy source. About 12% of the maximum chemical storage efficiency was obtained by the solar-simulated gasification of the coke.

scholarly journals A critical review of synthesis parameters affecting the properties of zinc oxide nanoparticle and its application in wastewater treatment

2021 ◽  
Vol 11 (2) ◽  
Author(s):  
E. Y. Shaba ◽  
J. O. Jacob ◽  
J. O. Tijani ◽  
M. A. T. Suleiman
Keyword(s):  
Zinc Oxide ◽  
Metal Oxides ◽  
Zinc Oxide Nanoparticles ◽  
Textural Properties ◽  
Oxide Nanoparticles ◽  
Zinc Oxide Nanoparticle ◽  
Synthesis Parameters ◽  
Metal Precursors ◽  
Removal Of Heavy Metals ◽  
Oxide Nanoparticle

AbstractIn this era, nanotechnology is gaining enormous popularity due to its ability to reduce metals, metalloids and metal oxides into their nanosize, which essentially alter their physical, chemical, and optical properties. Zinc oxide nanoparticle is one of the most important semiconductor metal oxides with diverse applications in the field of material science. However, several factors, such as pH of the reaction mixture, calcination temperature, reaction time, stirring speed, nature of capping agents, and concentration of metal precursors, greatly affect the properties of the zinc oxide nanoparticles and their applications. This review focuses on the influence of the synthesis parameters on the morphology, mineralogical phase, textural properties, microstructures, and size of the zinc oxide nanoparticles. In addition, the review also examined the application of zinc oxides as nanoadsorbent for the removal of heavy metals from wastewater.

Effect of Calcination on the Basic Strength of Surface Modified Nano-Zinc Oxide Characterised by FTIR and Back Titration Methods

2015 ◽  
Vol 1107 ◽  
pp. 326-332
Author(s):  
Abdul Rahim Yacob ◽  
Kamaluddeen Suleiman Kabo
Keyword(s):  
Zinc Oxide ◽  
Metal Oxides ◽  
Base Catalysis ◽  
Nano Zinc Oxide ◽  
Back Titration ◽  
And Performance ◽  
Nano Zinc ◽  
Surface Modified ◽  
Heterogeneous Base ◽  
Basic Strength

The use of metal oxides in heterogeneous base catalysis has gained a large interest due to their application in many chemical and industrial processes and is environmental friendly. Basic metal oxides are commonly used and their structures, morphology and performance can be modified by method of preparation and thermal activation. In this study, surface modified amphoteric zinc oxide was prepared via hydration-dehydration method and characterised by TGA and FTIR. The basic strength at various temperatures is characterised by FTIR and back titration analyses. The results shows that surface modified zinc oxide has the highest basic strength of 1.453mmolg-1at 400°C making it a relatively good and suitable compound for use in heterogeneous basic catalysis. This result is also supported by FTIR spectra which show possible relationship between the Lewis O2-and increasing basic strength.

Electronic Promotion Effects of Metal Oxides: A Case Study of MnO Impact on Fischer–Tropsch Catalysis

2021 ◽  
Author(s):  
S. S. Gupta ◽  
P. M. Shenai ◽  
J. Meeuwissen ◽  
G. L. Bezemer ◽  
S. Shetty
Keyword(s):  
Metal Oxides ◽  
Fischer Tropsch

Iterative Reverse Monte Carlo and Molecular Statics for Improved Atomic Structure Modeling: A Case Study of Zinc Oxide Grown by Atomic Layer Deposition

2021 ◽  
Author(s):  
Ryan C Gettler ◽  
Henry D Koenig ◽  
Matthias J Young
Keyword(s):  
Monte Carlo ◽  
Zinc Oxide ◽  
Diffraction Data ◽  
Atomic Structure ◽  
Atomic Layer ◽  
Structure Modeling ◽  
Reverse Monte Carlo ◽  
Layer Deposition ◽  
Energetic Constraints

Reverse Monte Carlo (RMC) modeling is a common method to derive atomic structure models of materials from experimental diffraction data. However, RMC modeling does not impose energetic constraints and can...

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