製銑プロセスから排出される CO2 を削減する対応策の一つとして，現状未利用である有機系の廃棄物を炭材として有効利用する方法がある。本研究では，酸化鉄から金属鉄を製造するための還元材として，都市ごみ炭化物および木質バイオマス炭化物といった有機系の廃棄物を利用し，それらの炭材への適用性を実験的に検討した。主な結果として酸化鉄 (Fe2O3) と還元材 (都市ごみ炭化物，木質バイオマス炭化物，石炭およびグラファイト) の混合試料による還元実験を実施したところ，都市ごみ炭化物および木質バイオマス炭化物の各混合試料において金属鉄を生成した。これは都市ごみ炭化物および木質バイオマス炭化物中の固定炭素による還元反応性が石炭やグラファイトのそれよりも高いためである。このような実験成果から都市ごみ炭化物および木質バイオマス炭化物は還元鉄を製造するための還元材として十分に有効利用できる廃棄物であること...

Due to the abundance of the non-coking coal and limitations as well as the high costs of the natural gas, the present study examined the direct reduction of hematite (iron oxide) ore in the temperature range of 800-1000 °C by the non-coking coal volatiles. Approximately, 74.9% of the total amounts of volatiles and gases exit the coal up to 800°C. The onset temperature to exit volatiles from the...

Iron oxide is an important biological agent that has a key role in medical processes; however, the mechanism whereby it provides iron for human and animal cells and its biological uses remains unclear. We aimed to evaluate the effects of oral iron oxide on serum iron status and compare the results with those of iron sulfate as a reference salt. Fifteen adult rabbits were divided into 3 groups o...

the heterogeneous photo-fenton degradation of crystal violet under visible light has been investigated usingcopper modified iron oxide. the photocatalyst has been prepared by coprecipitation method. the rate ofphotocatalyic degradation of dye was monitored spectrophotometrically. it has been observed thatphotocatalytic degradation follows pseudo first order kinetics. the effect of various param...

nanostructured iron oxide powder that has been recovered from waste pickling liquor unit of steel industry was studied for oxidation catalytic applications. in this research, the powder was characterized by x-ray diffraction (xrd) and transition electron microscopy (tem) for determination of phase structure, morphology and particle size. furthermore, the specific surface area of the powder was ...

Under anoxic conditions, zerovalent iron (Fe(0)) reduces nitrate to ammonium and magnetite (Fe3O4) is produced at near-neutral pH. Nitrate removal was most rapid at low pH (2-4); however, the formation of a black oxide film at pH 5 to 8 temporarily halted or slowed the reaction unless the system was augmented with Fe(2+), Cu(2+), or Al(3+). Bathing the corroding Fe(0) in a Fe(2+) solution great...

Several Fe-Ce catalysts for FT synthesis were prepared following two different methods: coprecipitation from Fe and Ce nitrate solutions and a physical mixture of pure Fe and Ce oxide precursors. Previously to CO hydrogenation, catalysts were activated in syngas (50 ml/min, H2/CO = 2) at 553 K for 1 h at atmospheric pressure. The iron phases developed after activation pretreatment were identifi...