Synthesis and characterization of Pd-MCM-22 and Pt-SAPO-11 catalysts for transformation of n-butane to aromatic hydrocarbons

被引：21

作者：

Kumar, N ^{[1
]}

Byggningsbacka, R ^{[1
]}

Korpi, M ^{[1
]}

Lindfors, LE ^{[1
]}

Salmi, T ^{[1
]}

机构：

[1] Abo Akad Univ, Fac Chem Engn, Proc Chem Grp, Lab Ind Chem, FIN-20500 Turku, Finland

来源：

APPLIED CATALYSIS A-GENERAL | 2002年 / 227卷 / 1-2期

关键词：

catalyst synthesis; characterization; zeolite; MCM-22; SAPO-11; noble metals; aromatization; n-butane; light hydrocarbons;

D O I：

10.1016/S0926-860X(01)00926-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Pd-Na-MCM-22, Pd-H-MCM-22 and Pt-SAPO-11 catalysts were synthesized and characterized using techniques of X-ray powder diffraction, scanning electron microscopy, FTIR, nitrogen adsorption and X-ray fluorescency. The FTIR spectra of I'd and Pt modified MCM-22 and SAPO-I I exhibited lower amounts of Bronsted (B) and Lewis (L) acid sites than the unmodified MCM-22 and SAPO-11. The catalysts were tested in the transformation of n-butane to aromatic hydrocarbons. Aluminosilicate type of zeolite catalysts Pd-Na-MCM-22 and Pd-H-MCM-22 exhibited higher selectivity to aromatics than aluminophosphate Pt-SAPO-11. The pretreatment of the catalysts with oxygen and hydrogen was found to influence the n-butane conversion and selectivity to aromatic hydrocarbons. The hydrogen pretreated Pt-SAPO-11 exhibited higher n-butane conversion than the oxygen pretreated. The catalysts exhibited deactivation with time on stream due to coke formation and pore blocking. The specific surface areas of the Pt-SAPO-11, Pd-Na-MCM-22 and Pd-H-MCM-22 deactivated catalysts were found to be lower than the fresh because of coke deposits inside the pores. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：97 / 103

页数：7

共 14 条

[1] THE STATE OF PLATINUM IN HIGH-SILICA ZEOLITES AND ITS CATALYTIC ACTIVITY IN ETHANE AND PROPANE AROMATIZATION [J].

BRAGIN, OV ;

SHPIRO, ES ;

PREOBRAZHENSKY, AV ;

ISAEV, SA ;

VASINA, TV ;

DYUSENBINA, BB ;

ANTOSHIN, GV ;

MINACHEV, KM .

APPLIED CATALYSIS, 1986, 27 (02) :219-231

[2] Comparison of the activity and selectivity of Pt/SAPO-5 and Pt/SAPO-11 in n-hexane and n-heptane hydroconversion [J].

Campelo, JM ;

Lafont, F ;

Marinas, JM .

APPLIED CATALYSIS A-GENERAL, 1997, 152 (01) :53-62

[3] Synthesis and characterization of H-ZSM-22, Zn-H-ZSM-22 and Ga-H-ZSM-22 zeolite catalysts and their catalytic activity in the aromatization of n-butane [J].

Kumar, N ;

Lindfors, LE ;

Byggningsbacka, R .

APPLIED CATALYSIS A-GENERAL, 1996, 139 (1-2) :189-199

[4]

KUMAR N, 2000, P 9 INT S HET CAT BU, P865

[5]

Lawton J A., 1995, Stud. Surf. Sci. Catal, V98, P250

[6]

Lok B. M., 1984, US Patent, Patent No. 4440871

[7] INFLUENCE OF IRIDIUM, RHENIUM AND LANTHANUM ON PROPANE AROMATIZATION OVER PLATINUM/ZSM-5 CATALYSTS [J].

MAGGIORE, R ;

SCIRE, S ;

GALVAGNO, S ;

CRISAFULLI, C ;

TOSCANO, G .

APPLIED CATALYSIS, 1991, 79 (01) :29-40

[8] SAPO-11, SAPO-31, and SAPO-41 molecular sieves: Synthesis, characterization, and catalytic properties in n-octane hydroisomerization [J].

Meriaudeau, P ;

Tuan, VA ;

Nghiem, VT ;

Lai, SY ;

Hung, LN ;

Naccache, C .

JOURNAL OF CATALYSIS, 1997, 169 (01) :55-66

[9] PROPANE CONVERSION ON GA-HZSM-5 - EFFECT OF AGING ON THE DEHYDROGENATING AND ACID FUNCTIONS USING PYRIDINE AS AN IR PROBE [J].

MERIAUDEAU, P ;

HAMID, SBA ;

NACCACHE, C .

JOURNAL OF CATALYSIS, 1993, 139 (02) :679-682

[10] THE REACTION OF PROPANE OVER ZSM-5-H AND ZSM-5-ZN ZEOLITE CATALYSTS [J].

MOLE, T ;

ANDERSON, JR ;

CREER, G .

APPLIED CATALYSIS, 1985, 17 (01) :141-154

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