Zeolithe – Eigenschaften und technische Anwendungen

Puppe, Lothar

doi:10.1002/ciuz.19860200404

Cited by 61 publications

(17 citation statements)

References 10 publications

(1 reference statement)

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“…Unter der Annahme des Aufbaus einer unendlichen Anzahl von Adsorptionsschichten entwickelten Stephen Brunauer (1903-1986), Paul H. Emmett (1900) und Edward Teller (1908 die sogenannte BET-Adsorptionsisotherme, die durch folgende Gleichung wiedergegeben wird: mit V ads -Gasvolumen, das beim Gleichgewichtsdruck p adsorbiert ist; In Wirklichkeit können auf der ersten Schicht zufällig noch weitere Schichten nahe der Sättigungsgrenze kondensieren, für die die Gesetzmäßigkeiten des verflüssigten Gases gelten.…”

Section: Beschreibenunclassified

Einführung in die Heterogene Katalyse

Reschetilowski

2015

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Section: Beschreibenunclassified

Einführung in die Heterogene Katalyse

Reschetilowski

2015

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“…Unter den katalytisch aktiven, siliciumreichen syn thetischen Zeolithen beansprucht das Pentasil ZSM-5 bislang das breiteste Interesse [1], In diesem Zeo lithen bilden komplexe 5-1-Baueinheiten ("secondary building units" [2]) aus 12 S i(A l)0 4-Tetraedern ver mittels Schraubung und Spiegelung Schichten, aus denen durch Inversion die dreidimensionale Struktur des ZSM-5 entsteht [3], Spiegeloperationen an die sen Schichten führen zur Struktur des ZSM-11 [4]. Zwischenstrukturen ZSM-5/11 mit geordnetem oder weniger geordnetem Wechsel zwischen Inversion und Spiegelung sind möglich und beschrieben [5,6].…”

Section: Introductionunclassified

Zur Bildungskinetik des Zeolithen ZSM-11 / On the Kinetics of Formation of the Zeolite ZSM-11

Hund

Tißler

Polanek

et al. 1987

Zeitschrift Für Naturforschung B

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AbstractThe synthesis of pentasil ZSM-11 with Bu4NHSO4 as template was first optimized in a tefloncoated autoclave of 200 ml volume (163 °C, 3 days) and then transferred to a stirring autoclave of 1000 ml volume. The latter allowed sampling over the period of crystallization. Pure ZSM-11 crystallized at temperatures between 150 and 180 °C. In this range the induction period decreased from 15 to 2 hours while the rate of crystallization was enhanced from 2.5 to 5.6% per minute. From these values energies of activation for nucleation and crystallization were determined (99.8 and 43.4 kJ mol-1).

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“…This breakthrough was possible by the first preparation of a synthetic zeolite by Barrer in the late 1940s [124,125]. Due to the rapid development of this field, more than 200 naturally occurring as well as synthetic zeolites are known today [126], but only the synthetic ones are of major industrial significance [127]. Important structural elements of zeolites are SiO 4 and AlO 4 tetrahedrons [128], which can be linked to form secondary building units.…”

Section: Synthesis Of Porous Nanocatalystsmentioning

confidence: 99%

“…Important structural elements of zeolites are SiO 4 and AlO 4 tetrahedrons [128], which can be linked to form secondary building units. Some zeolites consist of polyhedra made up by these secondary building units [127]. The basic approaches to prepare zeolites, already introduced by Barrer, are known as the hydrothermal synthetic techniques [129].…”

Section: Synthesis Of Porous Nanocatalystsmentioning

confidence: 99%

Nanocatalysis: Academic Discipline and Industrial Realities

Olveira

Forster

Seeger

2014

Journal of Nanotechnology

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Nanotechnology plays a central role in both academic research and industrial applications. Nanoenabled products are not only found in consumer markets, but also importantly in business to business markets (B2B). One of the oldest application areas of nanotechnology is nanocatalysis-an excellent example for such a B2B market. Several existing reviews illustrate the scientific developments in the field of nanocatalysis. The goal of the present review is to provide an up-to-date picture of academic research and to extend this picture by an industrial and economic perspective. We therefore conducted an extensive search on several scientific databases and we further analyzed more than 1,500 nanocatalysis-related patents and numerous market studies. We found that scientists today are able to prepare nanocatalysts with superior characteristics regarding activity, selectivity, durability, and recoverability, which will contribute to solve current environmental, social, and industrial problems. In industry, the potential of nanocatalysis is recognized, clearly reflected by the increasing number of nanocatalysis-related patents and products on the market. The current nanocatalysis research in academic and industrial laboratories will therefore enable a wealth of future applications in the industry.

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Zeolithe – Eigenschaften und technische Anwendungen

Cited by 61 publications

References 10 publications

Einführung in die Heterogene Katalyse

Einführung in die Heterogene Katalyse

Zur Bildungskinetik des Zeolithen ZSM-11 / On the Kinetics of Formation of the Zeolite ZSM-11

Nanocatalysis: Academic Discipline and Industrial Realities

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