Institut für Verfahrenstechnik, Umwelttechnik und Techn. Biowissenschaften
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Catalytic cracking of bio oils in internally circulating fluidized bed


Wir bitten um Verständnis, dass die Informationen über dieses Projekt derzeit nur in englischer Sprache verfügbar sind.


Oils from renewable biological sources are gaining in importance in response to decreasing crude oil reserves and subsequently increasing oil prices. Therefore an investigation was carried out into the possibility of adding oils from biological sources to the feedstock of FCC (Fluid Catalytic Cracking) processes. The purpose was to produce fuels in the diesel and gasoline boiling range and light hydrocarbons for the petrochemical industry.

The experiments were conducted in a continuously operated pilot-scale FCC-unit with internal CFB-design and focused on a thorough analysis of the basic applicability of these oils in a FCC-unit in terms of cracking reactions and subsequent effects on catalyst circulation and obtained product distribution. Special consideration was given to the effect of the bio oils on CO, CO 2 , NO x and SO 2 emissions in the regenerator flue gas. The applied bio oils, rapeseed oil and sunflower oil, were added to hydrated vacuum gas oil (standard FCC-feed) in different concentrations ranging up to 40 mass percent. The different experiments were conducted as continuous test runs and results were compared with the base case operation, using 100% vacuum gas oil.

The results show a small decrease in product conversion caused by the formation of water and CO 2 from the carboxylic groups of the bio oils. Detailed analysis of the gaseous product was conducted by means of gas chromatography indicating a shift to shorter hydrocarbons in the C 1 to C 3 range compared to the test runs with 100% vacuum gas oil.



Ass.Prof. Dipl.-Ing. Dr.techn. Alexander Reichhold