石油化工高等学校学报
石油化工高等學校學報
석유화공고등학교학보
JOURNAL OF PETROCHEMICAL UNIVERSITIES
2014年
3期
41-47
,共7页
于文宇%阮艳军%秦玉才%尹锋%范跃超%宋丽娟
于文宇%阮豔軍%秦玉纔%尹鋒%範躍超%宋麗娟
우문우%원염군%진옥재%윤봉%범약초%송려연
HY/MCM-41%复合分子筛%吸附脱硫%硫容量
HY/MCM-41%複閤分子篩%吸附脫硫%硫容量
HY/MCM-41%복합분자사%흡부탈류%류용량
HY/MCM-41%Composite molecular sieve%Adsorptive desulfurization%Sulfur capacity
采用附晶生长法合成了 HY/MCM-41复合分子筛,利用 X射线衍射仪(XRD)、N2吸附脱附、扫描电镜(SEM)、透射电镜(TEM)、智能重量分析仪(IGA)、吡啶原位红外(Py-IR)等技术对其物化性质进行了表征,发现HY/MCM-41复合分子筛具有微孔和介孔的双重孔道分布,且形貌为核壳结构。通过对金属 Ce离子改性制得吸附剂的吸附脱硫性能考察,发现固相研磨法改性的吸附剂在空速为5 h-1时吸附穿透硫容量可达1.81 mg/g,大于液相离子交换法改性的吸附剂吸附穿透硫容量1.32 mg/g。采用静态间歇法时,固相改性的吸附剂的脱硫率可达90.6%,高于液相改性的吸附剂脱硫率81.2%。同时发现,吸附剂表面的 B酸对吸附脱硫有着抑制作用,而 L 酸尤其是弱的 L酸的酸量与吸附脱硫性能有着正相关关系。
採用附晶生長法閤成瞭 HY/MCM-41複閤分子篩,利用 X射線衍射儀(XRD)、N2吸附脫附、掃描電鏡(SEM)、透射電鏡(TEM)、智能重量分析儀(IGA)、吡啶原位紅外(Py-IR)等技術對其物化性質進行瞭錶徵,髮現HY/MCM-41複閤分子篩具有微孔和介孔的雙重孔道分佈,且形貌為覈殼結構。通過對金屬 Ce離子改性製得吸附劑的吸附脫硫性能攷察,髮現固相研磨法改性的吸附劑在空速為5 h-1時吸附穿透硫容量可達1.81 mg/g,大于液相離子交換法改性的吸附劑吸附穿透硫容量1.32 mg/g。採用靜態間歇法時,固相改性的吸附劑的脫硫率可達90.6%,高于液相改性的吸附劑脫硫率81.2%。同時髮現,吸附劑錶麵的 B痠對吸附脫硫有著抑製作用,而 L 痠尤其是弱的 L痠的痠量與吸附脫硫性能有著正相關關繫。
채용부정생장법합성료 HY/MCM-41복합분자사,이용 X사선연사의(XRD)、N2흡부탈부、소묘전경(SEM)、투사전경(TEM)、지능중량분석의(IGA)、필정원위홍외(Py-IR)등기술대기물화성질진행료표정,발현HY/MCM-41복합분자사구유미공화개공적쌍중공도분포,차형모위핵각결구。통과대금속 Ce리자개성제득흡부제적흡부탈류성능고찰,발현고상연마법개성적흡부제재공속위5 h-1시흡부천투류용량가체1.81 mg/g,대우액상리자교환법개성적흡부제흡부천투류용량1.32 mg/g。채용정태간헐법시,고상개성적흡부제적탈류솔가체90.6%,고우액상개성적흡부제탈류솔81.2%。동시발현,흡부제표면적 B산대흡부탈류유착억제작용,이 L 산우기시약적 L산적산량여흡부탈류성능유착정상관관계。
HY/MCM-41 meso-micro-porous composite materials composed of a core of HY zeolite and a thin layer of MCM-41 have been synthesized by the overgrown crystallization.The samples were characterized by means of X-ray diffraction (XRD),N2 adsorption-desorption,scanning electron microscope (SEM),transmission electron microscope (TEM),Pyridine in situ infrared (Py-IR)and Intelligent Gravimetric Analyzer (IGA)instruments.It was found that the composite material exhibited both properties of mesoporous MCM-41 and microporous HY-zeolite sieves.Adsorptive desulfurization performances of Ce ion supported over the synthesized composites as a sulfur adsorbent were evaluated.It was found that when the adsorbent was prepared by a solid-state grinding method with sulfur capacity of 1.81 mg/g can be obtained.While for the liquid ion exchange method,only 1.32 mg/g sulfur capacity can be reached.Through the batch methods it is found that for the former modified adsorbents the desulfurization degree can be reached to 90.6% while the latter only 81.2%.It also can be found that the Br?nsted (B)acid of the adsorbent inhibited the adsorption desulfurization whereas the Lewis (L)acid,especially weak L acid,had a positive effecton adsorption desulfurization.