燃料化学学报2018，Vol.46Issue(2)：243-250,8.
介孔材料Co-MCM-41的合成及其吸附脱除各种碱性氮化物
Preparation of mesoporous Co-MCM-41 and its performance in adsorption removal of various basic nitrogen compounds
摘要
Abstract
The mesoporous materials MCM-41 and Co-MCM-41,with Co/Si (molar ratio)=0.18,were prepared by hydrotherrnal synthesis method with cobalt nitrate as cobalt source and characterized by X-ray diffraction (XRD),fourier transform infrared spectrometry (Fr-IR) and nitrogen adsorption-desorption.XRD and FT-IR results indicated that Co was introduced into the framework of mesoporous materials.The MCM-41 and Co-MCM-41 with highly ordered hexagonal mesoporous structure had been synthesized when the Co/Si (molar ratio) was 0.18 or less.But the sample had lost its ordered hexagonal mesoporous structure when Co/Si (molar ratio) was 0.22,indicating that the maximum addition amount of Co was about Co/Si(molar ratio)=0.18 when Co-MCM-41 was synthesized by using cobalt nitrate as cobalt source.Compared with the MCM-41,the intensity of XRD peak (100) of Co-MCM-41 became weak,broad and its surface area and total pore volume decreased,but the average pore diameter increased with the increase of Co amount.However,there was small amount of highly dispersed Co3O4 on the channel surface of Co-MCM-41 samples when the Co/Si(molar ratio)was 0.06 or more.Denitrification of model fuels containing about 1737.35 μg (nitrogen)/g of quinoline,aniline or pyridine was studied over the synthesized Co-MCM-41 with static adsorption at ambient conditions.The sequence of adsorption denitrification performance over all Co-MCM-41 samples was aniline,pyridine and quinoline.The adsorption capacity of Co-MCM-41 (0.06) for aniline,pyridine and quinoline was 42.17,35.66 and 29.18 mg(N)/g and the removal rate of basic nitrogen was 82.38％,73.53％ and 61.11％ respectively.The coexisting aromatic compounds in model fuel had little impact on the removal performance of basic nitrogen over Co-MCM-41 (0.06),implying that the N-M bond between the adsorption sites and N atom in the compound plays a significant role.Furthermore,Co-MCM-41 could be easily regenerated its adsorption denitrification performance by using calcination or ethanol regeneration method.关键词
介孔材料/Co-MCM-41/合成/表征/吸附脱氮Key words
mesoporous materials/Co-MCM-41/preparation/chatacterization/adsorption denitrification分类
化学化工引用本文复制引用
洪新,李云赫,赵永华,唐克..介孔材料Co-MCM-41的合成及其吸附脱除各种碱性氮化物[J].燃料化学学报,2018,46(2):243-250,8.基金项目
The project was supported by the Liaoning Provincial Natural Science Foundation of China(2014020113)and Guangxi Colleges and Universities Key Laboratory of Beibu Gulf Oil and Natural Gas Resource Effective Utilization (2016KLOG04).辽宁省自然科学基金(2014020113)和广西高校北部湾石油天然气资源有效利用重点实验室2016年度开放课题(2016KLOG04)项目资助 （2014020113）
