In situ  gravimetric studies of the regenerative mechanism for water‐gas shift over magnetite: Equilibrium and kinetic measurements in CO 2 /CO and H 2 O/H 2  gas mixtures | Zendy

Kubsh J. E. | Zendy; Dumesic J. A. | Zendy

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In situ gravimetric studies of the regenerative mechanism for water‐gas shift over magnetite: Equilibrium and kinetic measurements in CO 2 /CO and H 2 O/H 2 gas mixtures

Author(s) -

Kubsh J. E.,

Dumesic J. A.

Publication year - 1982

Publication title -

aiche journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.958

H-Index - 167

eISSN - 1547-5905

pISSN - 0001-1541

DOI - 10.1002/aic.690280514

Subject(s) - gravimetric analysis , chemistry , magnetite , chromia , water gas shift reaction , oxygen , kinetic energy , water gas , partial pressure , analytical chemistry (journal) , in situ , inorganic chemistry , catalysis , environmental chemistry , materials science , metallurgy , syngas , organic chemistry , physics , quantum mechanics

In situ gravimetric measurements were used to study oxygen removal from (or incorporation into) chromia‐promoted magnetite in CO 2 /CO and H 2 O/H 2 gas mixtures at 637 K. The equilibrium and kinetic data could be described by two reversible, oxidation‐reduction reactions: surface‐oxygen removal by CO and surface oxygen replenishment by H 2 O, with the corresponding reverse reaction involving CO 2 and H 2 . These reactions form a regenerative mechanism that is able to predict qualitatively both the measured rate and rate expression for water‐gas shift. It is concluded that this regenerative mechanism is a primary pathway for water‐gas shift over magnetite.

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