Electrochemical promotion of the SO2 oxidation over thin Pt films interfaced with YSZ in a monolithic electropromoted reactor

被引：12
|
作者：
Hammad, A. [1 ]
Souentie, S. [1 ]
Papaioannou, E. I. [1 ]
Balomenou, S. [2 ]
Tsiplakides, D. [2 ,3 ]
Figueroa, J. C. [4 ]
Cavalca, C. [4 ]
Pereira, C. J. [4 ]
机构：
[1] Univ Patras, Dept Chem Engn, LCEP, GR-26500 Patras, Greece
[2] Ctr Res & Technol Hellas, Chem Proc Engn Res Inst, GR-57001 Thessaloniki, Greece
[3] Aristotle Univ Thessaloniki, Dept Chem, GR-54124 Thessaloniki, Greece
[4] DuPont Co Inc, Cent Res & Dev MS&E, Wilmington, DE 19880 USA
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2011年 / 103卷 / 3-4期
关键词：
SO2; oxidation; EPOC; NEMCA effect; Pt thin films; MEPR; Electropromoted reactors; SULFUR-DIOXIDE OXIDATION; MOLECULAR-STRUCTURE; CATALYSTS; PLATINUM; GAS; ELECTRODES; CHEMISTRY; SUPPORT;
D O I：
10.1016/j.apcatb.2011.01.040
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The effect of electrochemical promotion of catalysis on the SO2 oxidation reaction was investigated over thin (similar to 40 nm) Pt catalyst electrodes interfaced with YSZ, in a monolithic electrochemically promoted (MEP) reactor equipped with five or twenty-two electrocatalytic plates. A mildly oxidizing gas mixture was used at temperatures from 330 to 370 degrees C and flowrates between 1 and 30 L min(-1). It was found that positive potential application, i.e. O2- supply to catalyst surface, can cause an increase of up to 200% in the catalytic oxidation rate of SO2 with Faradaic efficiency values up to 30 at flowrates as high as 30 L min(-1) which corresponds to 3 x 10(4) h(-1) space velocity or 0.1 s residence time. The results show the strong potential of MEP reactors for practical applications of the electrochemical promotion of catalysis (EPOC) effect, in gas treatment units and chemical synthesis and destruction processes. (c) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：336 / 342
页数：7
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