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Prüfung von Katalysatoren zur Spaltung von Methanol

Prüfung von Katalysatoren zur Spaltung von Methanol

          
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About the Book

Inhaltsangabe: Einleitung: Angeregt durch die Energiekrise und steigende Rohölpreise, sind die Forschungen auf dem Gebiet der alternativen Kraftstoffe mehr und mehr intensiviert worden. Neben Wasserstoff und Methan, deren Speicherung im KFZ ein bisher noch schwieriges Problem ist, bieten sich vor allem niedere Alkohole, also normalerweise Methanol und Ethanol, für den Betrieb von Ottomotoren an. Welchem von beiden der Vorzug zu geben ist, wird wohl größtenteils von ökonomischen Faktoren bestimmt werden. Am Institut für Chemische Technologie in Clausthal-Zellerfeld werden zur Zeit Versuche an methanolgetriebenen Motoren durchgeführt. Dabei ergeben sich u. a. Schwierigkeiten beim Kaltstart. Außerdem läuft ein flüssigkeitsbetriebener Ottomotor im unteren Teillastbereich besonders unwirtschaftlich. Beide Nachteile ließen sich meiden. Wegen. der bei Gasen äußerst schwierigen Speicherung steht zur Diskussion, das benötigte Brenngas durch katalytische Spaltung von Methanolkraftstoff im Motor selbst zu erzeugen. Das Ziel dieser Arbeit besteht nun darin, eine Auswahl von zur Methanolsynthese industriell eingesetzten Katalysatoren auf ihre Eignung für diesen Zweck vor zu untersuchen. Dabei ist von der technischen Seite her erwünscht: - Hoher Umsatz bei niederen Temperaturen. - Exotherme Spaltung bei niederen Temperaturen, die bei Temperatur in eine endotherme übergeht. - Unempfindlichkeit gegen Luftsauerstoff oder Wasser. - Gutes Langzeitverhalten. - Das Spaltgas soll möglichst wenig Wasser enthalten. Dieser Zielkatalog kann aber nur im Sinne eines Screening verfolgt werden. Grundexperiment ist dabei die isotherme Zersetzung von Methanol bei Variation der Temperatur unter Erfassung aller Produkte und Bilanzierung des Ergebnisses. Bei weiteren Versuchen an hiernach ausgewählten Katalysatoren kann deren Verhalten bei Variation einzelner Parameter (Belastung, Eduktzusammensetzung, Gesamtversuchszeit, etc) untersucht werden. Auf Basis der so erhaltenen Meßdaten soll dann


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Product Details
  • ISBN-13: 9783838650906
  • Publisher: Diplom.de
  • Binding: Paperback
  • Language: German
  • Returnable: N
  • Spine Width: 6 mm
  • Width: 148 mm
  • ISBN-10: 3838650905
  • Publisher Date: 04 Mar 2002
  • Height: 210 mm
  • No of Pages: 92
  • Series Title: German
  • Weight: 131 gr


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