| Autor: |
S. Peter, C. Freese, E. Pongratz, G. Härtel |
| Rok vydání: |
1996 |
| Předmět: |
|
| DOI: |
10.1016/s0921-8610(96)80011-2 |
| Popis: |
Publisher Summary Corrosion is a severe problem of hydrothermolytical oxidation; therefore, corrosion control deserves close attention in the course of further development. This chapter discusses a process that offers the possibility to use common reactor materials—high-grade steel 1.4541 or in selected applications even carbon steel St 1203. If calcium borate as corrosion inhibitor is used, special alloys like hastelloy or inconel are not absolutely necessary for wet oxidation in presence of chlorideions. Increasing of the pH-value of the reaction mixture decreases corrosion but the rate of oxidation decreases simultaneously. The decrease of the reaction rate could be compensated by increasing the reaction temperature or by adding suitable catalysts. Increase in the pH value from 4 to 9 causes a decrease of reaction rate. The increase of temperature from 473 K to 573 K redoubles the reaction rate. The global reaction order ranges between 0.5 and 1. It has been shown by the treatment of real waste water that the combination of wet oxidation and biological treatment afterwards leads to satisfactory results. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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