Thermal Reduction of Iron Oxide under Reduced Pressure and Implications on Thermal Conversion Efficiency for Solar Thermochemical Fuel Production

2015 ◽  
Vol 54 (26) ◽  
pp. 6793-6803 ◽  
Author(s):  
Abhishek K. Singh ◽  
Nicholas J. AuYeung ◽  
Kelvin Randhir ◽  
Rishi Mishra ◽  
Kyle M. Allen ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Conversion Efficiency ◽  
Thermal Conversion ◽  
Thermal Reduction ◽  
Fuel Production ◽  
Reduced Pressure ◽  
Reduction Of Iron ◽  
Solar Thermochemical

Extraction of Metals from Wastes of Metallurgical Production

2018 ◽  
Vol 284 ◽  
pp. 845-849 ◽  
Author(s):  
Yu.E. Tokach ◽  
Yu.K. Rubanov ◽  
O.V. Doroganova
Keyword(s):  
Iron Oxide ◽  
Thermal Reduction ◽  
Reducing Agents ◽  
Reducing Agent ◽  
Metallurgical Production ◽  
Reduction Of Iron ◽  
Extraction Of Metals

Studies on the thermal reduction of iron oxide by using reducing agents have been carried out. Carbon-containing components and aluminum were used as reducing agent. The reduction conditions were determined.

Thermal reduction of iron–manganese oxide particles in a high-temperature packed-bed solar thermochemical reactor

2021 ◽  
Vol 412 ◽  
pp. 128255
Author(s):  
Bo Wang ◽  
Lifeng Li ◽  
Florian Schäfer ◽  
Johannes J. Pottas ◽  
Apurv Kumar ◽  
...  
Keyword(s):  
High Temperature ◽  
Manganese Oxide ◽  
Packed Bed ◽  
Thermal Reduction ◽  
Reduction Of Iron ◽  
Oxide Particles ◽  
Solar Thermochemical ◽  
Iron Manganese

Design of a Lab-Scale Rotary Cavity-Type Solar Reactor for Continuous Thermal Reduction of Volatile Oxides Under Reduced Pressure

2009 ◽  
Author(s):  
Marc Chambon ◽  
Ste´phane Abanades ◽  
Gilles Flamant
Keyword(s):  
High Temperature ◽  
Metal Oxide ◽  
Thermal Reduction ◽  
Reduction Reaction ◽  
High Specific Surface Area ◽  
Reduced Pressure ◽  
Water Steam ◽  
Solar Reactor ◽  
Concentrated Solar Energy ◽  
Solar Thermochemical

The investigated two-step MxOy/ MxOy−1 solar thermochemical cycles consist of two redox reactions. Net result is watersplitting with concentrated solar energy as the source of high temperature process heat: 1)Solarreduction:MxOy→MxOy−1+1/2O2(about1700°Catatmosphericpressure,endothermal)2)Hydrolysis:MxOy−1+H2O→MxOy+H2(about400°C,exothermal) The MxOy−1 species produced in reaction (1) is gaseous in the case of the ZnO/Zn cycle. The oxide (ZnO) is injected in a solar thermochemical reactor and undergoes a thermal reduction reaction (oxygen release). Dilution/quenching with a neutral gas at the reactor exit yields nanoparticles of metal by condensation. The particles have a high specific surface area that leads to a high reactivity in the 2nd step. The reduced species (Zn) can then be fed to another reactor to react with water steam. The reaction produces pure H2 and forms the original metal oxide. A high-temperature lab-scale solar reactor prototype was designed, constructed and operated, allowing continuous metal oxide processing under controlled atmosphere. It is based on a cavity-type rotating receiver absorbing solar radiation. The reactant powder is injected continuously inside the cavity and the produced particles (Zn) are recovered in a downstream filter. The solar reduction of ZnO has been achieved, the reaction yields were quantified, and a first concept of solar reactor was qualified.

scholarly journals Phosphotungstic acid impregnated niobium coated superparamagnetic iron oxide nanoparticles as recyclable catalyst for selective isomerization of terpenes

RSC Advances ◽  
2021 ◽  
Vol 11 (23) ◽  
pp. 14203-14212
Author(s):  
Luccas Lossano Name ◽  
Sergio Hiroshi Toma ◽  
Helton Pereira Nogueira ◽  
Luis Humberto Avanzi ◽  
Rafael dos Santos Pereira ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Conversion Efficiency ◽  
Phosphotungstic Acid ◽  
Superparamagnetic Iron Oxide ◽  
Recyclable Catalyst ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Magnetically Recyclable Catalyst

Conversion efficiency as high as 80–100% and 50% selectivity for camphene and limonene was achieved with low production of polymeric byproducts (18–28%), using a new magnetically recyclable catalyst – SPION-Nb30@HPW.

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