Experimental study of the direct reduction of sinterized zinc oxide by hydrogen

✍ Scribed by F. Gioia; G. Mura; A. Viola

• Publisher: Elsevier Science
• Year: 1977
• Tongue: English
• Weight: 899 KB
• Volume: 32
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(77)85037-9

✦ Synopsis

The gas-solid reaction between hydrogen and smtenzed zinc oxide has been studied expenmentally and theoretically The attention has been focused on the influence that the elementary chemical and physical phenomena, talung place mslde the pellet, have on the overall reaction rate The experunental results, worked out according to the mathematical model proposed, allowed both to check the vah&ty of tlus model and to determme the true kmetic constant and the acnvauon energy of the reaction The discrepancies between expenmental results and theory are well wlthm the lumts of uncertamty alfectmg both the mdependentIy evaluated physical parameters (such as dBuslv1tie-s. mternal area, etc ) and the measured parameters for low values of the reachon tunes On the contrary, the larger lscrepancles found for larger values of tune, may be attnbuted to the major dficultles connected wdh the modelhng of the Internal structure of a porous sohd which 1s consumed dunng a reachon, for advanced states of consumption Tbe method adopted for analyzmg contmuously with tune the reaction products, made use of a thermobalance workmg at room temperature