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首页> 外文期刊>RSC Advances >Performance assessment of activated carbon supported catalyst during catalytic wet oxidation of simulated pulping effluents generated from wood and bagasse based pulp and paper mills
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Performance assessment of activated carbon supported catalyst during catalytic wet oxidation of simulated pulping effluents generated from wood and bagasse based pulp and paper mills

机译：活性炭负载的催化剂在湿法催化湿法氧化过程中的性能评估，模拟湿法是由木材和蔗渣制浆造纸厂产生的模拟制浆废水

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摘要

In the present study, the performance of catalytic wet oxidation (CWO) was investigated for the treatment of two simulated pulping effluents (with chemical oxygen demand (COD) = 15?000 and 17?000 mg L?1, respectively) from large and small scale pulp and paper mills. CWO was performed in a 0.7 L capacity high pressure reactor at 190 °C temperature and 0.9 MPa oxygen partial pressure for 3 h duration with activated carbon (AC) supported Cu–Ce catalyst. More than 70% reduction in chemical oxygen demand (COD) and 90% color removal from the wastewaters were achieved during CWO. The biodegradability ratio of wastewater samples was improved to 0.52 from the initial values of 0.26 and 0.31, respectively. The conversion of lignin after CWO was confirmed by nuclear magnetic resonance analysis. Homo-catalytic oxidation equally contributed to organics degradation during the hetero-catalytic reaction. The detailed results on metal leaching, hydrothermal treatment without oxygen and catalyst reuse are also presented.
机译：在本研究中，研究了催化湿式氧化（CWO）处理两种模拟制浆废水（化学需氧量（COD）= 15？000和17？000 mg L ≥1）的性能。 ）分别来自大型和小型制浆造纸厂。 CWO在活性炭（AC）负载的Cu-Ce催化剂中，在0.7 L容量的高压反应器中于190°C的温度和0.9 MPa的氧气分压下进行3小时。在CWO过程中，化学需氧量（COD）降低了70％以上，废水中的脱色率达到90％以上。废水样品的生物降解率分别从初始值0.26和0.31提高到0.52。通过核磁共振分析证实了CWO后木质素的转化。均相催化氧化在杂催化反应中同样有助于有机物的降解。还介绍了有关金属浸出，无氧水热处理和催化剂再利用的详细结果。

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