摘要
采用水热合成法制备了介孔MCM-41和Ba-MCM-41分子筛,并利用X射线衍射、N2吸附-脱附、傅里叶变换红外光谱对介孔MCM-41和Ba-MCM-41分子筛进行了表征.将Ba-MCM-41分子筛用于对模拟油的静态吸附脱氮试验,结果表明,当模拟油用量为15 mL时,较适宜的吸附脱氮条件为分子筛用量0.3 g、吸附温度30℃、吸附时间10 min.吸附等温线的研究结果表明,Ba-MCM-41分子筛对吡啶和苯胺的吸附符合Freundlich等温吸附,对喹啉的吸附符合Langmuir等温吸附.采用Materials Studio软件模拟得到的MCM-41分子筛的XRD谱图与试验制备样品的XRD谱图完全相同,并采用该软件模拟计算了吡啶、苯胺、喹啉分子在Ba-MCM-41分子筛团簇上的吸附能及其与活性中心的距离.3种氮化物在Ba-MCM-41分子筛上的吸附能及其与活性中心距离的计算结果与试验结果一致,Ba-MCM-41分子筛对吡啶和苯胺的吸附能力强于对喹啉的吸附能力.
Mesoporous MCM-41 and Ba-MCM-41 molecular sieves were successfully prepared by hydrothermal synthesis and characterized by X-ray diffraction(XRD),Fourier transform infrared spectrometry(FT-IR)and nitrogen adsorption-desorption techniques.Ba-MCM-41 molecular sieve was used to remove nitrogen from simulated oil by static adsorption.The results showed that the best adsorption and denitrification effect was achieved when the molecular sieve dosage was 0.3 g,adsorption temperature was 30℃,adsoptlo time was 10 min,and the simulated fuel dosage was 15 mL.The results of adsorption showed that the adsorption of pyridine and aniline on Ba-MCM-41 molecular sieve accorded with Freundlich isothermal adsorption,while that of quinoline accorded with Langmuir isothermal adsorption.The XRD spectra of MCM-41 molecular sieve constructed by Materials Studio software was identical to that of the samples prepared by the experiment.The adsorption energy of pyridine,aniline and quinoline molecules on Ba-MCM-41 molecular sieve and their distances from the active center of Ba-MCM-41 molecular sieve were calculated.The calculated results of the adsorption energies of three nitrogen compounds on Ba-MCM-41 were in agreement with the experimental results.The adsorption capacity of Ba-MCM-41 molecular sieve for pyridine and aniline was stronger than that for quinoline.
作者
富添
洪新
矫宝庆
王聚财
孙潇镝
唐克
Fu Tian;Hong Xin;Jiao Baoqing;Wang Jucai;Sun Xiaodi;Tang Ke(School of Chemical and Environmental Engineering,Liaoning University of Technology,Jinzhou,Liaoning 121001)
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2022年第5期28-35,共8页
Petroleum Processing and Petrochemicals
基金
辽宁省自然科学基金项目(2019-ZD-0699)。
关键词
Ba-MCM-41
吸附脱氮
模拟计算
吡啶
苯胺
喹啉
Ba-MCM-41
adsorption denitrification
simulation calculation
pyridine
aniline
quinoline
