Understanding Hydrogen in Bayer Process Emissions. 4. Hydrogen Production during the Wet Oxidation of Industrial Bayer Liquor
| Autor: | Joanne S.C. Loh, Allan Costine |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Hydrogen General Chemical Engineering Inorganic chemistry chemistry.chemical_element 02 engineering and technology General Chemistry equipment and supplies 021001 nanoscience & nanotechnology Pulp and paper industry Bayer process Organic compound Anoxic waters Industrial and Manufacturing Engineering Refinery 020501 mining & metallurgy 0205 materials engineering chemistry Degradation (geology) Wet oxidation 0210 nano-technology Hydrogen production |
| Zdroj: | Industrial & Engineering Chemistry Research. 55:4415-4425 |
| ISSN: | 1520-5045 0888-5885 |
| DOI: | 10.1021/acs.iecr.6b00853 |
| Popis: | To provide a basis for strategies to prevent the formation of potentially explosive gas mixtures during Bayer digestion and wet oxidation processes, a quantitative description of the hydrogen production capacities of industrial liquor is required, along with an improved understanding of the reactions that produce hydrogen gas. This study is the fourth in a series aimed at addressing these knowledge gaps. For a low-temperature refinery liquor, it was found that doubling the TOC conversion from 20 to 40% resulted in a 5-fold increase in the amount of hydrogen evolved (∼0.06 mol H2/L of liquor), indicating that the degradation of refractory organic compounds in the liquor contributes to a significant amount of the hydrogen produced. Critically, more hydrogen was produced under wet oxidation conditions than under the largely anoxic conditions encountered in digestion, with the magnitude of this effect diminishing with an increase in temperature (180–270 °C). The wet oxidation of several model organic compound... |
| Databáze: | OpenAIRE |
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