Sulfatization of vanadium pentoxide in equilibrium gaseous mixtures containing SO{sub 2}, SO{sub 3}, and O{sub 2}

Journal Article · Fri Jul 01 04:00:00 EDT 1994 · Kinetics and Catalysis

OSTI ID:62482

Ivanenko, S V; Dzhoraev, R R ^[1]

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1. Mendeleev Univ. of Chemical Engineering, Moscow (Russian Federation)

The sulfatization of V{sub 2}O{sub 5} supported on SiO{sub 2} and SiO{sub 2} + MgSO{sub 4} carriers in equilibrium gaseous SO{sub 2}-SO{sub 3}-O{sub 2}-N{sub 2} mixtures at P{sub SO{sub 3}} = 0.8 - 33 kPa and T {>=} 673 K is studied using a flow thermogravimetric setup. Sulfatization is accompanied by V{sub 2}O{sub 5} reduction and production of vanadyle sulfate VOSO{sub 4}, which can decay completely or partially, depending on the conditions. This is supported by hysteresis observed in the course of the sulfatization and desulfatization of the catalyst. The experimental data indicates the formation of surface sulfates with various formations heats, which is determined by the energetic heterogeneity of the surface.

• OSTI ID: 62482
• Journal Information: Kinetics and Catalysis, Journal Name: Kinetics and Catalysis Journal Issue: 4 Vol. 35; ISSN 0023-1584; ISSN KICAA8
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
ABSORPTION
ACTIVATION ENERGY
CATALYSIS
OXIDATION
SILICA
SORPTIVE PROPERTIES
SULFATES
SULFUR DIOXIDE
VANADIUM OXIDES