Back to Search
Start Over
Mixed Chromate and Molybdate Additives for Cathodic Enhancement in the Chlorate Process
- Source :
- Electrocatalysis, 12(4), 447-455. Springer
- Publication Year :
- 2021
- Publisher :
- Springer Science and Business Media LLC, 2021.
-
Abstract
- The economic viability of the electrochemical chlorate process depends on toxic chromate to induce cathodic selectivity to hydrogen and mitigate reduction of hypochlorite or chlorate. In this study, it is shown that performance of a pilot plant for chlorate production can be sustained when a 1000-fold reduction in chromate concentration is compensated by addition of molybdate. Laboratory measurements employing a Quartz Crystal Microbalance suggest growth of a nanometre-thick hybrid Mo–Cr-oxide film to induce cathodic selectivity. An optimized energy efficiency for pilot plant operation was obtained using 0.8 mM molybdate and 27 μM chromate, balancing formation of an effective oxide layer and undesired Mo-induced decomposition of hypochlorite to oxygen in solution. Refinement at the pilot scale level is expected to further optimize the energy consumption, thereby increasing safety aspects and the economic viability of chlorate production. Graphical Abstract
- Subjects :
- Electrochemical Quartz Crystal Microbalance (eQCM)
Chromate conversion coating
Chlorate
Inorganic chemistry
UT-Hybrid-D
Oxide
Hypochlorite
02 engineering and technology
Molybdate
010402 general chemistry
021001 nanoscience & nanotechnology
Electrochemistry
01 natural sciences
0104 chemical sciences
Cathodic protection
Cathode selectivity
chemistry.chemical_compound
Pilot plant
Industrial electrochemistry
chemistry
Electrolyte additives
0210 nano-technology
Hydrogen
Subjects
Details
- ISSN :
- 18685994 and 18682529
- Volume :
- 12
- Database :
- OpenAIRE
- Journal :
- Electrocatalysis
- Accession number :
- edsair.doi.dedup.....0ac745475dcc60b01a27c13e6e9e2600
- Full Text :
- https://doi.org/10.1007/s12678-021-00666-7