Jun 25, 2019   8:40 a.m. Tadeáš
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Ing. Jakub Husár
Identification number: 61034
University e-mail: jakub.husar [at] stuba.sk
 
2831V00  Chemical Engineering D-CHEI
FCFT D-CHEI den [year 2]
Doctoral type of study, full-time, attendance method form
2nd year of study

Contacts     Graduate     Lesson     Final thesis     Projects     Publications     

Basic information

Basic information about a final thesis

Type of thesis: Diploma thesis
Thesis title:Preparation and characterization of catalysts for tar decomposition
Written by (author): Ing. Jakub Husár
Department: Institute of Chemical and Environmental Engineering (FCFT)
Thesis supervisor: doc. Ing. Pavol Steltenpohl, PhD.
Opponent:prof. Ing. Jozef Markoš, DrSc.
Final thesis progress:Final thesis was successfully defended.


Additional information

Additional information about the final thesis follows. Click on the language link to display the information in the desired language.

Language of final thesis:Slovak

Slovak        English

Title of the thesis:Preparation and characterization of catalysts for tar decomposition
Summary:The main goal in chemical technology of the 21 st. century is to reduce the production of greenhouse gases and to increase the efficiency of waste recycling and its transformation into energy, fuel and raw materials. Fossil fuels are non-renewable energy resource so in order to assure sustainable development renewable and environment-friendly energy sources and fuels will have to be discovered. Biomass and waste are considered as renewable energy sources which can be transformed into usable heat, electric energy, fuel and raw materials by their combustion, gasification or pyrolysis. Pyrolysis and gasification of biomass and waste, especially waste tires, are considered as modern ways of energy and fuel production. Gaseous, liquid and solid products are formed during gasification and pyrolysis processes. Waste tires are usually pyrolyzed into bio-oil which can be used as an additive to standard fuel like gasoline or diesel. Permanent gases are usually the main product of gasification. These gases contain a small portion of condensable vapors which are also known as tar. Tar removal is quite difficult so it is much more suitable to suppress tar formation (increase its decomposition) by the choice of right process conditions or by a catalyst addition. This paper is focused on the tar-decomposition catalyst preparation, study of its physical properties and catalytic activity during tar removal. Dolomite and tire pyrolysis char were used as a material for catalyst preparation. Raw catalysts were thermally stabilized at temperatures from 800 °C to 1000 °C and impregnated by nickel afterwards. Toluene was used as a model tar compound. Experiment was carried out in a fixed bed reactor at 800 °C. The composition of permanent gases leaving the reactor was periodically measured so the decrease in catalytic activity of used catalysts caused by char formation could be observed. To suppress char formation, steam was used as a constituent of the inlet gaseous stream.
Key words:gasification, tar decomposition, catalyst

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