期刊
CHEMICAL ENGINEERING JOURNAL
卷 326, 期 -, 页码 339-349出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2017.05.149
关键词
Lean conditions; Structured catalysts; Pressure drop; Heat transfer; Process intensification
资金
- Italian project PRIN IFOAMS (Intensification of catalytic processes for clean energy, low-emission transport and sustainable chemistry using opencell FOAMS as novel advanced structured materials) - Italian Ministry of Education, University and Research [PRIN-2010XFT2BB]
- Italy (Italian Ministry of Foreign Affairs) [M00478]
- Poland (Polish Ministry of Science and Higher Education) [M00478]
- University of Tehran
The reactivity of a catalytic layer consisting of 3 wt.% of Pd/Co3O4 over an alumina monolith (100 cpsi, diameter 0.9 cm, length 3 cm) and two alumina open cell foams (30 and 45 ppi, diameter 0.9 cm, length 3 cm) was investigated in the oxidation of residual methane in lean conditions. The ceramic structures were coated via solution combustion synthesis (Co3O4) and wetness impregnation (Pd). The catalytic reactivity of the catalysts coated on the structured supports was assessed in a gas mixture containing 0.5 or 1 vol.% of methane at different weight hourly space velocities (WHSV, 30 and 60 NL h(-1) g(cat)(1)). Moreover, the prepared structured catalysts were characterized by measuring the pressure drop and determining the volumetric heat transfer coefficients. Both the WHSV and the characteristics of the support influenced the catalytic activity. In general, open cell foams coated with Pd/Co3O4 show superior catalytic activity than the coated monolith. (C) 2017 Elsevier B.V. All rights reserved.
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