摘要
在以环丁砜为原料选择性加氢脱氧制备四氢噻吩的过程中,本体型Ni-Mo催化剂存在缓慢失活和选择性下降的现象。采用X射线衍射(XRD)、X射线能谱(EDS)、N_2吸附-脱附(BET)、同步热分析(DSC-TGA)、电感耦合等离子发射光谱(ICP-AES)、扫描电镜(SEM)等方法,分别对新鲜和失活催化剂进行了表征,探讨了本体型Ni-Mo催化剂在催化环丁砜选择性加氢脱氧过程中性能劣化的原因,并对失活催化剂进行了再生研究。结果表明,Ni、Mo活性组分的深度硫化形成的Ni-Mo-S相是催化剂催化性能下降的主要原因,而导致催化剂比表面积和孔径降低的积炭则对催化剂性能的影响较小;失活催化剂具有良好的再生性能。
The selectivity and activity of bulk Ni-Mo catalysts decrease in selective hydrodeoxygenation ofsulfolane to synthesize tetrahydrothiophene.Fresh and used bulk Ni-Mo catalysts in selective hydrodeoxygenationof sulfolane were characterized using X-ray diffraction(XRD),energy dispersive X-ray spectroscopy(EDS),N2adsorption-desorption(BET),synchronous thermal analysis(DSC-TGA),inductively coupled plasma emissionspectroscopy(ICP-AES)and scanning electron microscopy(SEM).The mechanism of performancedeterioration of catalysts was investigated,and the regeneration of deactivated catalysts was studied.The resultsindicate that Ni-Mo-S phase formation from deep sulfurization of Ni and Mo active components is likely themain reason for selectivity decrease.Meanwhile,carbon deposition which results in less surface area andsmaller pore size of the catalyst has little influence on catalytic performance.In addition,the deactivatedcatalyst exhibits good catalytic activity after regeneration.
作者
马时运
卜佳玉
段艳
侯凯湖
MA Shi-yun;BU Jia-yu;DUAN Yan;HOU Kai-hu(College of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China;College of Chemistry and Environment Engineering, Baise University, Baise 533000, China)
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2017年第4期863-869,共7页
Journal of Chemical Engineering of Chinese Universities
关键词
环丁砜
四氢噻吩
加氢脱氧
失活
再生
sulfolane
tetrahydrothiophene
hydrodeoxygenation
deactivation
regeneration
