Review Article
Polymeric Gas-Separation Membranes for Petroleum Refining
Table 12
Comparison with different technologies for VOCs removal [
27,
159,
160].
| Technology | VOC content | Efficiency (%) | Temperature (°C) | Remarks |
| Thermal oxidation | 20 ppm–20% LEL | 95–99 | 371 | (i) Energy recovery up to 85%. (ii) Chlorinated compounds can form toxic gases. |
| Catalytic oxidation | 100–1000 | 90–98 | 149 | (i) Energy recovery up to 70%. (ii) Efficiency is dependent on operating conditions. (iii) Certain impurities can poison the catalyst. |
| Activated carbon | 700–10,000 | 80–90 | <54 | (i) Performance is greatly affected by moistures. (ii) Unstable in ketones, aldehydes, and esters. |
| Membranes | <20 ppm–25% LEL | 90–99 | Ambient | (i) Treated gas does not require further processing. |
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