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ACTIVIDAD CATALíTICA DE SULFUROS DE NI Y W SOPORTADOS SOBRE ZEOLITA ULTRAESTABLE
CID,RUBY; BENDEZú,SALVADOR; LóPEZ AGUDO,ANTONIO;
Boletín de la Sociedad Chilena de Química , 2002, DOI: 10.4067/S0366-16442002000100004
Abstract: catalytic activity on cyclohexene hydroconversion of ni and w sulfides supported on ultrastable zeoltie was studied. the preparation method ( ion exchange, impregnation, or formation of small nio clusters ) of usy zeolite supported ni, w, and niw sulfide catalysts has a strong influence on the activity and selectivity
HIDRODESULFURACIóN DE TIOFENO SOBRE CATALIZADORES Ni-W Y Ni-Re. EFECTO DEL SOPORTE
ALVEZ,G.; GARCIA,R.; CID,R.; ESCALONA,N.; GIL-LLAMBIAS,F.J.;
Boletín de la Sociedad Chilena de Química , 2001, DOI: 10.4067/S0366-16442001000300015
Abstract: w, re, niw and nire supported catalyst, on pillared clays (pilc), ultrastable zeolite (usy), active carbon (carbon) and alumina (al2o3) were prepared. the active fase and support influence in the reaction of hydrodesulfurization (hds) of thiophene under atmosferic pressure and t= 400°c have been studied. the catalytic activities increases when the nickel is incorporated to the w monomethalic catalyst, in the four studied supports, and this difference is more notorius when the support is alumina. on the other hand, if nickel is incorporated to re monomethalic catalyst, when the support are carbon and al2o3, no significant change is observed on the catalytic activities. when the used support are pilc and usy the ni incorporation decreases the catalytic activity. the catalytic activity results are discussed in function of some properties of the support and catalyst, and possible sinergic and antagonic effects that would be generated
Bimetallic Pt-Ni catalysts supported on usy zeolite for n-hexane isomerization
Barsi, F. V.;Cardoso, D.;
Brazilian Journal of Chemical Engineering , 2009, DOI: 10.1590/S0104-66322009000200012
Abstract: isomerization of linear alkanes has had considerable importance for the refining industry because the isomers formed in this reaction have high octane number. most works reported in the literature studied the use of bifunctional catalysts, i.e., ones that have acid sites and metallic sites. in this study, bifunctional monometallic (ni or pt) and bimetallic catalysts (pt-ni), using husy zeolite as the support, were prepared in order to verify the role of the metal content and composition on the catalytic properties for n-hexane isomerization. the method used for metal dispersion in the zeolite was competitive ion exchange using ammine complexes [ni(nh3)6]cl2 and [pt(nh3)4]cl2 as precursors. four series of catalysts with constant atomic metal content had total metal amounts between 130 and 280 μmol m/gcat. catalysts were characterized by temperature programmed reduction (tpr) and subjected to catalytic evaluation for n-hexane isomerization at 250 oc and 1 atm using h2/c6 = 9 molar ratio. tpr results show an easier reducibility of ni+2 cations in the presence of pt, which was evidenced by the displacement of the reduction peak of those cations towards lower temperatures in bimetallic catalysts. the bimetallic catalysts presented a higher activity in the isomerization of n-hexane when compared to the monometallic ones, as well better stability as the pt content in the solid increases. the results of the activity as a function of the pt content in the bimetallic catalysts show a maximum value around 50% of pt. an addition of pt above this critical value leads to a small decrease of the catalytic activity.
Direct synthesis of liquefied petroleum gas from biomass synthesis gas
生物质合成气一步法合成LPG的实验研究

LU Yong-xing,WANG Tie-jun,LI Yu-ping,WU Chuang-zhi,MA Long-long,
吕永兴
,王铁军,李宇萍,吴创之,马隆龙

燃料化学学报 , 2008,
Abstract: 由生物质气化合成液体燃料(甲醇、二甲醇和低碳烃类),是理想的碳中性绿色燃料,将其用作城市交通和民用燃料,已经引起全世界的广泛关注.1,2]
烯烃在USY沸石表面上化学反应热的量热测定
谢鹏,周立幸
分子催化 , 1992,
Abstract: 1.前言 在多相催化研究工作中,测定反应物分子在固体催化剂表面上化学吸附时产生的反应热,或者说化学吸附热,对研究催化剂的性质和反应物的表面化学反应都很有帮助。但是目前尚无有效的方法测定它。本文用吸附量热法测定了烯烃在USY沸石表面的吸附热,并提出了一种化学吸附热的估算方法。
萘与异丙醇在脱al超稳y沸石催化剂上烷基化
于清跃,火焱,武文良
南京工业大学学报(自然科学版) , 2009, DOI: 10.3969/j.issn.1671-7627.2009.06.004
Abstract: 采用水蒸气和nh4no3水溶液对超稳y沸石(usy)进行脱al,并采用过量浸渍法制备了脱alusy负载磷钨酸(pw)催化剂,用x射线衍射(xrd)、液n2吸附脱附和吸附吡啶红外(pyir)技术对催化剂进行了表征.结果表明:水蒸气脱铝后的usy保持了较高的比表面积、较高的相对结晶度、规则的孔径分布和较大的l酸量.萘与异丙醇烷基化反应结果表明:水蒸气脱铝usy催化剂具有最大的萘转化率923%和459%的dipn选择性,其中βipn选择性达到944%,β,β′位选择性为853%,适宜反应条件为活化温度550℃,反应温度160℃,平衡时间150min;反应4次后萘的转化率保持在73%以上,β,β′dipn选择性无明显下降.
MODIFICACIONES DE LAS PROPIEDADES TEXTURALES Y ESTRUCTURALES DE UNA ZEOLITA USY Y DE SUS MEZCLAS CON "CAOLíN CLAY" Y CLORHIDROL COMO CONSECUENCIA DEL TRATAMIENTO HIDROTéRMICO
Agámez Pertuz,Yazmin Yaneth; Oviedo Aguiar,Luis Alfredo; Navarro Uribe,Uriel; Centeno,Miguel Angel; Odriozola,José Antonio;
Revista Colombiana de Química , 2006,
Abstract: fcc catalyst is made up of particles of complex composition where the main active component is a y zeolite. this work presents the textural and structural results of a commercial usy zeolite which had been previously prepared from a set of catalysts with 7, 15, 25, 35 y 45% of active material and of the hydrothermally deactivated materials zeolite. the samples have been characterized by x-ray fluorescence (xrf), x-ray diffraction (xrd), 29si nmr spectroscopy and nitrogen adsorption at 77k. from these results was found correlations between micropore volume and zeolite content and degree crystallinity and %zeolite. also, it was found that an hydrothermal treatment at 1033 k with only 20% steam during 16 hours destroys the structural groups si(2al) and si(3al) as a reflection of the strongly dealumination of the zeolite component of the catalyst.
Formation of nanometer-sized Au particles on USY zeolites under hydrogen atmosphere
Kazu Okumura,Chika Murakami,Tetsuya Oyama,Takashi Sanada,Ayano Isoda,Naonobu Katada
Gold Bulletin , 2012, DOI: 10.1007/s13404-012-0051-z
Abstract: Gold was deposited on ultrastable Y (USY) zeolite using a newly developed method: just mixing an aqueous solution of HAuCl4 and zeolite at 353 K in which the NH 4 + cation reacted with the Cl in HAuCl4. Treatment of the Au-loaded USY zeolite in the atmosphere of hydrogen resulted in the formation of Au0 nanoclusters with 1.8 nm diameter at 773 K. The size of Au particle was dependent on the type of zeolite support, composition of gas atmosphere, and temperature of calcination, which was correlated with catalytic performance. This study demonstrated the potential use of zeolites with strong Br nsted acid character as gold supports.
SECONDARY PORE STRUCTURE OF USY ZEOLITES STUDIED BY POSITRON ANNIHILATE TECHNIQUE
用正电子湮没技术研究USY沸石的“二次孔”结构

MA LI,CHEN ZHI-QUAN,WANG SHAO-JIE,PENG ZHI-LIN,LUO XI-HUI,
马莉
,陈志权,王少阶,彭治林,罗锡辉

物理学报 , 1997,
Abstract: 测量了NaY及USY沸石的正电子寿命谱.得到NaY沸石有四个寿命分量:两个短寿命分量和两个长寿命分量.两个长寿命分量中,τ3,τ4分别是o-Ps在β笼和超笼中的湮没.USY沸石有五个寿命分量:两个短寿命分量和三个长寿命分量,三个长寿命分量中,τ3为o-Ps在笼中的湮没,τ4,τ5分别为o-Ps在“二次微孔”和“二次中孔”中的湮没.与NaY沸石相比,在真空中,USY的τ4增加到
SELECTIVE HYDRODESULPHURIZATION OF FULL RANGE FCC GASOLINE ON PtPd/USY-ZEOLITE
J. Hancsók,S. Magyar,D. Kalló
Petroleum and Coal , 2004,
Abstract: FCC gasoline is generally responsible for more than 90% of the sulphur compounds in the engine gasoline,its desulphurization is thus required to produce ultra low sulphur gasoline (sulphur content <10 ppm). In thispaper the possibilities of reducing the sulphur content of FCC gasolines are summarized. In theexperimental section the results of hydrodesulphurization carried out over PtPd/USY zeolite with full rangeFCC gasoline feeds of different sulphur content are presented. The original 66 ppm sulphur content of thegasoline was increased to 196 ppm by adding benzothiophene. For comparison the feed was hydrotreatedon conventional CoMo/Al2O3 catalyst, too. The results indicated that PtPd/USY-zeolite is suitable for theselective desulphurization of FCC gasoline cracked from pre-treated FCC feed. Aiming 10-20 ppm sulphurcontent in the products the loss of research octane number was ca. 2.5-3.0 units lower on PtPd/zeolite thanon conventional CoMo/alumina.
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