MARC details
| 000 -LEADER |
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| fixed length control field |
02014nam a2200325Ia 4500 |
| 003 - CONTROL NUMBER IDENTIFIER |
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| control field |
MX-MdCICY |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
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| control field |
20250625153948.0 |
| 040 ## - CATALOGING SOURCE |
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| Transcribing agency |
CICY |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) |
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| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) |
B-14809 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
250602s9999 xx |||||s2 |||| ||und|d |
| 245 10 - TITLE STATEMENT |
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| Title |
Nickel modified H-ZSM-5 catalysts |
| 490 0# - SERIES STATEMENT |
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| Volume/sequential designation |
Applied Catalysis A: General, 114, p.295-311, 1994 |
| 520 3# - SUMMARY, ETC. |
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| Summary, etc. |
Nickel containing H-ZSMJ catalysts were prepared by impregnation with nickel nitrate at pH 1.8 and 4.8. The catalysts were characterized by infrared spectroscopy of adsorbed carbon monoxide and ammonia, by temperature-programmed reduction as well as by chemisorption of hydrogen and oxygen. The conversion of n-hexane served as a catalytic test reaction. Impregnation at pH 1.8 leads to nickel ions exchange of Br@nsted sites in the channel system. These are hardly reducible and are not detectable by IR spectroscopy of adsorbed carbon monoxide. Aromatization is increased. This is explained by the presence of ionic nickel Lewis sites, active in dehydrogenation. With impregnation at pH 4.8, tetrameric nickel ions exist, not able to penetrate into the channels, and nickel is mainly located outside the channels as metallic nickel. The selectivity to aromatics is still higher. This should be due to the action of metallic nickel, which promotes the direct dehydrocyclization. The hydrogenolysis activity of metallic nickel is suppressed. |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
ACIDITY |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
H-ZSM-5 |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
HEXANE CONVERSION |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
HIDDN POSITION |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
HYDROGEN/OXYGEN CHEMISORPTION |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
INFRARED SPECTROSCOPY |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
NILH-ZSM-5 |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
TEMPERATURE-PROGRAMMED REDUCTION |
| 700 12 - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Hoang, D.L. |
| 700 12 - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Berndt, H. |
| 700 12 - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Miessner, H. |
| 700 12 - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Schreier, E. |
| 700 12 - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Vijlter, J. |
| 700 12 - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Lieske, H. |
| 856 40 - ELECTRONIC LOCATION AND ACCESS |
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| Uniform Resource Identifier |
<a href="https://drive.google.com/file/d/12Npn_K_LOkBqnHvl4MIlxbsrftd3ia1f/view?usp=drivesdk">https://drive.google.com/file/d/12Npn_K_LOkBqnHvl4MIlxbsrftd3ia1f/view?usp=drivesdk</a> |
| Public note |
Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
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| Source of classification or shelving scheme |
Clasificación local |
| Koha item type |
Documentos solicitados |
