An iron ore-based catalyst for producing hydrogen and metallurgical carbon via catalytic methane pyrolysis for decarbonisation of the steel industry

卷:48

Article

关键词: COX-FREE HYDROGEN;    DECOMPOSITION;    NI;    DEACTIVATION;    KINETICS;    OXIDES;    COKE;   

DOI  :  10.1016/j.ijhydene.2023.03.022

来源: SCIE

【 摘 要 】

Experiments to investigate the catalytic pyrolysis of methane using an iron ore-based catalyst were carried out to optimize catalytic activity and examine the purity of the car-bon produced from the process for the first time. Ball milling of the iron ore at 300 rpm for varying times -from 30 to 330 min -was studied to determine the effect of milling time on methane conversion. Optimal milling for 270 min led to a five-fold increase in methane conversion from ca. 1%-5%. Further grinding resulted in a decline of methane conversion to 4% shown by SEM to correspond to an increase in particle size caused by agglomeration. Data from Raman and Moeurossbauer spectroscopy and H2 temperature programmed reduc-tion indicated a change in phase from magnetite to maghemite and hematite (at the par-ticle surface) as the grinding time increased. Analysis of the carbon produced as a byproduct of the reaction indicated a highly pure material with the potential to be used as an additive for steel production.& COPY; 2023 The Authors. Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC. This is an open access article under the CC BY license (http://creativecommons.org/ licenses/by/4.0/).

【 授权许可】

Free