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以蜂窝煤渣为载体采用浸渍法制备催化剂,研究了浸渍液种类、浓度、浸渍温度、浸渍时间、焙烧温度和焙烧时间对催化剂催化性能的影响。结果表明,催化剂的最佳制备条件为:在35℃条件下,利用0.2 mol/L的Ni(NO_3)_2溶液将载体浸渍2 h。浸渍结束后将载体过滤并干燥,再在300℃条件下利用箱式电阻炉焙烧2 h。研究还发现Ni作为活性成分的催化剂其催化性能最好。最后,采用最佳条件下制备的催化剂湿式催化氧化处理亚甲基蓝废水,发现当废水浓度为120 mg/L且pH保持不变,催化剂用量为10 g/L,质量分数30%的H_2O_2作为氧化剂且用量为5 mL/L,反应温度为30℃,反应时间为2 h的条件下,对亚甲基蓝的去除率达到了80.17%。通过BET和BJH分析发现催化剂比制备前载体增加了较多的介孔和微孔,其比表面积增加。
The honeycomb cinder was used as carrier to prepare the catalyst by impregnation method. The effects of impregnation solution type, concentration, impregnation temperature, impregnation time, calcination temperature and calcination time on the catalytic performance of the catalyst were studied. The results showed that the best preparation conditions of the catalyst were that the carrier was immersed in 0.2 mol / L Ni (NO 3) 2 solution for 2 h at 35 ℃. After impregnation, the support was filtered and dried, and then calcined at 300 ° C for 2 h using a box-type resistance furnace. The study also found that Ni as the active component of the catalyst has the best catalytic performance. Finally, wet oxidation of methylene blue wastewater with the catalyst prepared under the optimum conditions showed that when the wastewater concentration was 120 mg / L and the pH was kept constant, the catalyst dosage was 10 g / L and the mass fraction of H 2 O 2 was 30% 5 mL / L, reaction temperature 30 ℃, reaction time 2 h, the removal rate of methylene blue reached 80.17%. It was found by BET and BJH analysis that the mesopores and micropores were increased more than the pre-prepared carriers, and the specific surface area increased.