MIAOJia,WANGBei,MAOMiao-jie,et al.Beta Molecular Sieve Catalyst for Catalytic Oxidation of Ink Sludge[J].China Water & Wastewater,2022,38(23):100-108.
Beta Molecular Sieve Catalyst for Catalytic Oxidation of Ink Sludge
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第23期
Page:
100-108
Column:
Date of publication:
2022-12-01
- Abstract:
- By preparing four kinds of heterogeneous catalysts supported on Beta molecular sieve, the effects of factors such as catalyst types, catalyst dosage, oxidant dosage, reaction temperature and reaction time on the catalytic oxidation of ink sludge were investigated, and the two groups of catalysts with the best and the worst performances were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). In addition, orthogonal experiment was designed to analyze the influence of the former four factors on the heterogeneous catalytic oxidation of ink sludge, and the kinetics of catalytic wet oxidation (CWO) for ink sludge treatment was investigated. The optimal reaction conditions of heterogeneous catalyst for catalytic oxidation of ink sludge were eventually determined as follows: adding 20 mL distilled water to every 5 g of ink sludge, the catalyst (Fe-Beta) and oxidant (hydrogen peroxide, 30%) dosages of 40 mg and 0.3 mL. After reacting at 200 ℃ for 1 h, the removal rates of COD, SS and VSS were 99.64%, 87.56% and 85.40%, respectively. The specific resistance of the ink sludge decreased from 1.68×1010 s2/g to 3.26×109 s2/g, and the capillary suction time (CST) of sludge decreased from 93.1 s to 23.7 s, indicating that the dewatering performance of sludge was greatly enhanced.
Last Update:
2022-12-01