Design of solid reactants and reaction kinetics concerning the iron compounds in the UT-3 thermochemical cycle
1992; Elsevier BV; Volume: 17; Issue: 10 Linguagem: Inglês
10.1016/0360-3199(92)90022-o
ISSN1879-3487
AutoresR AMIR, Tohru Sato, K YOKOYAMAMOTO, T. Kabe, Hideo Kameyama,
Tópico(s)Catalysis and Oxidation Reactions
ResumoA preparation method has been studied for Fe compound reactant pellets, which are required to be highly reactive and durable to operate successfully in the UT-3 thermochemical water-decomposition process. Reactant pellets were prepared by calcination of a pelletized mixture of magnetite powder (reactant), inert ceramic particles of silica and zirconia powder (support substance) and such additives as cellulose and graphite powders (to give porosity). The reactant pellets were prepared by adding both graphite and zirconia powders into the raw materials until the pellets showed the highest reactivity and durability. It was shown that the pore volume of pellets increased linearly from 0.07 to 0.35 ml g−1 with the graphite content in the raw material mixtures, and that pellets prepared with 20 wt% graphite were five times as reactive as those prepared without graphite. Kinetics measurements were made for bromination of hematite and magnetite, and hydrolysis of iron bromide.
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