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臭氧氧化工艺中催化剂性能评价与筛选
Evaluation and screening of catalyst performance in ozone oxidation process
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- DOI:
- 作者:
- 李开红，穆亦欣，于 娟，聂春梅，帕提古丽，赛尔达尼
Li Kaihong，Mu Yinxin，Yu Juan，Nie Chunmei，Patikuli，Sedani
- 作者单位:
- 中石油克拉玛依石化有限责任公司炼油化工研究院，新疆 克拉玛依 834000
Oil Refining & Chemical Engineering Research Institute，PetroChina Karamay Petrochemical Co. Ltd.，Karamay 834000，China
- 关键词:
- 臭氧催化氧化；COD；机械强度；活性评价
ozone catalytic oxidation；COD；mechanical strength；activity evaluation
- 摘要:
- 摘要：针对炼油厂工业水车间臭氧氧化塔内催化剂结垢严重、出水 COD 超标的问题，开展了催化剂性能评价与筛选。结果表明，经过高含盐浓水浸泡120 h后，CuiH和CuiM催化剂的低抗压占比为50%，CuiS催化剂的低抗压占比为36%，CuiN催化剂低抗压占比为15%，CuiT催化剂剂低抗压占比为 10%，CuiH、CuiM、CuiS 催化剂低抗压占比不达标。在同等条件下进行催化剂静态活性评价试验，CuiS、CuiH、CuiT对克石化膜浓水COD的降解效果较好，在臭氧投加比为 3 时，浓水 COD 可由 198 mg/L 降低到 60 mg/L 以下。催化剂 CuiM 可使浓水 COD 稳定在60~65 mg/L；催化剂 CuiN 可使浓水 COD 稳定在 90 mg/L。从活性评价结果来看，CuiH 和 CuiT的效果较好，但是CuiH机械强度较差。CuiT催化剂机械强度大、活性高，可作为备选催化剂。利用浸泡试验和静态活性评价试验相结合的办法可快速实现浓水催化剂的评价筛选，为现场更换催化剂提供技术参考和应用指导。Abstract: In view of the serious scaling and excessive COD of catalyst in ozone oxidation tower of industrial water workshop ofrefinery, the performance evaluation and screening of catalyst were carried out. The results showed that after soaking in highly salineconcentrated water for 120 h, the low compression ratio of CuiH and CuiM catalysts, CuiS, CuiN catalyst, CuiT catalystwas 50%,36%, 15% and 10% separately. The low compression ratio of CuiH, CuiM and CuiS catalysts is not up to standard. Under the sameconditions, CuiS, CuiH and CuiT have a good effect on the degradation of COD in the membrane concentrated water. When theozone ratio was 3, the COD in the concentrated water can be reduced from 198 mg/L to less than 60 mg/L. The catalyst CuiM canstabilize the COD of concentrated water at 60~65 mg/L. The catalyst CuiN can stabilize the COD of concentrated water at 90 mg/L.According to the activity evaluation results, CuiH and CuiT had better effect, but CuiH had poor mechanical strength. CuiT catalysthad high mechanical strength and high activity, and can be used as an alternative catalyst. The combination of immersion test andstatic activity evaluation test can quickly evaluate and screen concentrated water catalysts, and provide technical reference andapplication guidance for field catalyst replacement.