摘要
为了高效催化裂解草甘膦副产废盐中的有机污染物,采用等体积浸渍法制备了不同钼负载量的负载型Cu-Mo/Al_(2)O_(3)复合金属催化剂。通过旋转式管式炉,探究催化剂对废盐催化裂解总有机碳含量(TOC)的影响。通过X线粉末衍射(XRD)、N_(2)物理吸脱附(N_(2)-adsorption-desorption)、H_(2)程序升温还原(H_(2)TPR)、O_(2)程序升温脱附(O_(2)TPD)、拉曼光谱(Raman spectrum)对催化剂的晶型结构、孔结构和氧化还原性质等进行了表征。结果表明,5Cu-25Mo/Al_(2)O_(3)复合金属催化剂具有良好的催化裂解草甘膦副产废盐的效果,使废盐的总有机碳值由1042 mg/L降至4.17 mg/L,TOC去除率达到99.6%。通过对废盐催化裂解过程中排出的尾气进行了非甲烷总烃含量(NMHC)在线检测,在10 mg/m^(3)以下,对处理后的废盐进行了傅里叶红外光谱(FT-IR)检测,证明了铜钼金属离子的协同作用促进了废盐中有机污染物的分解,其有机污染物脱除效果良好。
Supported Cu-Mo/Al_(2)O_(3)composite metal catalysts with different molybdenum loads were prepared by equivolumetric impregnation method in order to efficiently catalyse the pyrolysis of organic pollutants in glyphosate by-product waste salt.The effect of catalysts on the total organic carbon content(TOC)of waste salt catalytic cracking was investigated in a rotary tube furnace.The crystal structure,pore structure and REDOX properties of the catalyst were characterized by X-ray powder diffraction(XRD),N_(2)physical Adsorption-Desorption,H_(2)programmed temperature reduction(H_(2)-TPR),O_(2)programmed temperature desorption(O_(2)-TPD)and Raman spectroscopy.The results showed that the 5Cu-25Mo/Al_(2)O_(3)composite metal catalyst had a good catalytic cracking effect on the by-product waste salt of glyphosate,reducing the total organic carbon value of the waste salt from 1042 mg/L to 4.17 mg/L,and the TOC removal rate was 99.6%.The non-methane total hydrocarbon content(NMHC)of the exhaust gas discharged from the catalytic cracking process of waste salt was detected online,and Fourier infrared spectroscopy(FT-IR)was carried out to detect the treated waste salt below 10 mg/m^(3).It was proved that the synergic action of copper and molybdenum metal ions promoted the decomposition of organic pollutants in waste salt,and the organic pollutants removal effect was good.
作者
梁国强
崔咪芬
乔旭
刘清
陈献
LIANG Guoqiang;CUI Mifen;QIAO Xu;LIU Qing;CHEN Xian(College of Chemical Engineering,Nanjing Tech University,Nanjing 211800,China;State Key Laboratory of Materials-Oriented Chemical Engineering,Nanjing Tech University,Nanjing 211800,China)
出处
《南京工业大学学报（自然科学版）》
CAS
北大核心
2023年第6期600-609,共10页
Journal of Nanjing Tech University(Natural Science Edition)
基金
国家重点研发计划(2019YFC1905804)
江苏省重点研发计划(BE2019735)。
关键词
复合金属催化剂
草甘膦副产废盐
有机污染物
催化裂解
composite metallic catalyst
glyphosate by-product waste salt
organic pollutant
catalytic cracking
