Using Water Hydrogen Instead of Reducing Gas in the Production of Direct Reduced Iron (DRI)
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Jaleel K. Ahmad
Abstract
Oil rich countries are using natural gas as a source for reducing gas (H2 ≈75%, and CO ≈ 14%) for the production of DRI from iron oxide ore. In this research we are proposing a new source that is pure hydrogen (>99%) obtained from the electrolysis of water. The size of the hydrogen molecule is much smaller than that of carbon monoxide molecule, thus hydrogen molecule could penetrate much deeper into the crystal structure of the iron oxide resulting in greater degree of metallization. Since huge quantity of hydrogen is needed to reduce the iron oxide (e.g. to produce one million ton/year DRI), so prolonged electrolysis of alkaline aqueous solution is required; this will be accompanied by large quantity of oxygen gas liberated at the anode electrode (430000 tons/year) which is useful for industry and health purposes, as well as the production of about 108 tons/year heavy water residue, the last could have wide uses in the nuclear and other industries and also in research. In the standard processes using reducing gas the final step (3 hours) is cooling and carburizing step, during which carbon is deposited from carbon monoxide simultaneously with cooling. In case of pure hydrogen the step is different thus we call it “cooling and extra reduction step” in which hydrogen raises the degree of metallization instead of carbon deposition which inhibits extra reduction due to the sealing of the porosity of product sponge iron.
© 2016 by Walter de Gruyter Berlin/Boston
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Articles in the same Issue
- Achieving Stable Biological Oxidation of Erratic Waste Gas Streams by Utilizing Cyclic Adsorption/Desorption Beds
- Production of Titanium Dioxide Nanoparticles and Nanostructures from Dye Wastewater Sludge - Characterisation and Evaluation of Photocatalytic activity
- The Application of Photocatalytic Oxidation in Removing Pentachlorophenol from Contaminated Water
- H2O2/UV-C Treatment of the Economically Important Naphthalene Sulfonate J-Acid: Process Optimization, Kinetic Evaluation and Activated Sludge Inhibition
- Nonthermal Plasma Destruction of Trifluoromethane Using a Dielectric- Packed Bed Reactor
- Investigation of Electric Discharge Sound in Atmospheric Pressure Plasma
- Chlorophenols Contaminated Soil Remediation by Peroxidation
- Synthesis, Characterization and Visible-Light Photocatalytic Activity of La2O3/SnO2 Nanocomposite
- Electrical Discharge Characteristics Using a Bubble in Water and Their Applications to the Water Treatment
- Development of Higher Yield Ozonizer Based on Nano-Seconds Pulsed Discharge
- Ozone Mass Transfer in a Recirculating Loop Semibatch Reactor Operated at High Pressure
- Arc Plasma for Materials Detoxification and their Conversion
- Comparison of Photocatalytic Activities of Commercial Titanium Dioxide Powders Immobilised on Glass Substrates
- Coupling of Adsorption on Zeolite and V-UV Irradiation for the Treatment of VOC Containing Air Streams: Effect of TiO2 on the VOC Degradation Efficiency
- Anaerobic Photocatalytic Oxidation of Carbohydrates in Aqueous Pt/TiO2 Suspensions with Simultaneous Production of Hydrogen
- Using Water Hydrogen Instead of Reducing Gas in the Production of Direct Reduced Iron (DRI)
