典型文献
Hydrogen-based direct reduction of iron oxide at 700℃: Heterogeneity at pellet and microstructure scales
文献摘要：
Steel production causes a third of all industrial CO2 emissions due to the use of carbon-based substances as reductants for iron ores, making it a key driver of global warming. Therefore, research efforts aim to replace these reductants with sustainably produced hydrogen. Hy-drogen-based direct reduction (HyDR) is an attractive processing technology, given that direct reduction (DR) furnaces are routinely operated in the steel industry but with CH4 or CO as reductants. Hydrogen diffuses considerably faster through shaft-furnace pellet agglomerates than carbon-based reductants. However, the net reduction kinetics in HyDR remains extremely sluggish for high-quantity steel production, and the hydrogen consumption exceeds the stoichiometrically required amount substantially. Thus, the present study focused on the improved under-standing of the influence of spatial gradients, morphology, and internal microstructures of ore pellets on reduction efficiency and metallization during HyDR. For this purpose, commercial DR pellets were investigated using synchrotron high-energy X-ray diffraction and electron micro-scopy in conjunction with electron backscatter diffraction and chemical probing. Revealing the interplay of different phases with internal inter-faces, free surfaces, and associated nucleation and growth mechanisms provides a basis for developing tailored ore pellets that are highly suited for a fast and efficient HyDR.
文献关键词：
中图分类号：
作者姓名：
Yan Ma;Isnaldi R.Souza Filho;Xue Zhang;Supriya Nandy;Pere Barriobero-Vila;Guillermo Requena;Dirk Vogel;Michael Rohwerder;Dirk Ponge;Hauke Springer;Dierk Raabe
作者机构：
Max-Planck-Institut für Eisenforschung,Max-Planck-Stra?e 1,40237 Düsseldorf,Germany;Corrosion Center,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;Institute of Materials Research,German Aerospace Center(DLR),Linder H?he,51147 Cologne,Germany;Lehr-und Forschungsgebiet Metallische Strukturen und Werkstoffsysteme für die Luft-und Raumfahrt,RWTH Aachen University,52062 Aachen,Germany;Institut für Bildsame Formgebung,RWTH Aachen University,Intzestra?e 10,52072 Aachen,Germany
文献出处：
引用格式：
[1]Yan Ma;Isnaldi R.Souza Filho;Xue Zhang;Supriya Nandy;Pere Barriobero-Vila;Guillermo Requena;Dirk Vogel;Michael Rohwerder;Dirk Ponge;Hauke Springer;Dierk Raabe-.Hydrogen-based direct reduction of iron oxide at 700℃: Heterogeneity at pellet and microstructure scales)[J].矿物冶金与材料学报,2022(10):1901-1907
A类：
HyDR,stoichiometrically
B类：
Hydrogen,direct,reduction,iron,oxide,Heterogeneity,scales,Steel,production,causes,third,industrial,emissions,due,carbon,substances,reductants,ores,making,key,driver,global,warming,Therefore,research,efforts,aim,replace,these,sustainably,produced,hydrogen,attractive,processing,technology,given,that,furnaces,are,routinely,operated,steel,industry,but,CH4,diffuses,considerably,faster,through,shaft,agglomerates,than,However,kinetics,remains,extremely,sluggish,quantity,consumption,exceeds,required,amount,substantially,Thus,present,study,focused,improved,under,standing,influence,spatial,gradients,morphology,internal,microstructures,pellets,efficiency,metallization,during,For,this,purpose,commercial,were,investigated,using,synchrotron,energy,ray,diffraction,electron,scopy,conjunction,backscatter,chemical,probing,Revealing,interplay,different,phases,free,surfaces,associated,nucleation,growth,mechanisms,provides,basis,developing,tailored,highly,suited,efficient
AB值：
0.592172
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