厦门大学学报（自然科学版）2018，Vol.57Issue(1)：32-37,6.DOI:10.6043/j.issn.0438-0479.201703025
PdNi/C低温高效催化湿式氧化无害化处理氨氮废水
Efficient Harmless-degrading of Ammonia by Catalytic Wet Air Oxidation with PdNi/C Catalyst Under Mild Conditions
摘要
Abstract
The pollution of wastewater containing ammonia becomes more and more serious.Ammonia can be efficiently removed by catalytic wet air oxidation (CWAO)technology.However,most of CWAO processes are operated at high pressures and tempera-tures,because the applied catalysts exhibited poor catalytic prefromance under mild conditions.In this study,PdNi/C bimetallic cata-lyst was prepared via a chemical reduction method and investigated for CWAO of ammonia to N2 .It is found that the combining of Pd and Ni enables PdNi/C bimetallic catalyst to possess higher catalytic performance,especially at low temperatures,although it contains a lower Pd loading,compared with Pd/C.At 140 ℃,almost 100％ ammonia can be removed by 2％Pd1％Ni/C bimetallic catalyst,while only 86.4％ and 50.6％ can be removed respectively with 3％Pd/C and 3％Ni/C,under the capacity around 33 L wastewater (ρ0NH3=1000 mg/L,pH=12)per kilo catalyst per hour with the pressure of 2 MPa conduct for 3 h.Even at 120 ℃, more than 80％ ammonia can be removed using 2％Pd 1％Ni/C.Moreover,the selectivity to N2 for 2％Pd1％Ni/C is higher than 90％.The characterization results of X-ray diffraction(XRD),CO temperature programmed reduction(CO-TPR)and X-ray photo-electron spectroscopy(XPS)indicate that the synergy between Pd and Ni modifies the redox properties and thus promotes the cata-lytic performance.关键词
催化湿式氧化/PdNi/C/氨氮废水Key words
catalytic wet air oxidation(CWAO)/PdNi/C/ammonia nitrogen wastewater分类
化学化工引用本文复制引用
王子丹,HameedSohaib,张诺伟,陈秉辉..PdNi/C低温高效催化湿式氧化无害化处理氨氮废水[J].厦门大学学报（自然科学版）,2018,57(1):32-37,6.基金项目
国家科技支撑计划(2014BAC10B01) （2014BAC10B01）
福建省自然科学基金(2015J05031) （2015J05031）
