Andras Sapi’s Research Page

CO2 activation and in-situ techniques

CO2 activation with H2 or CH4 are performed in flow reactors equppied with GC-FID-TCD-MS to produce valuable fuels e.g. C5+ liquids. Batch mode reactor is available for special reactions as well as 2D catalysts. Besides CO2 activation, ethanol decomposition, hydrosylilation etc. reactions are tested in both gas or liquid phase. In-situ techniques such as DRIFTS, NAP-XPS as well as synchroton-based techniques (EXAFS, GISAXS) are used for molecular level understanding of the reactions for improving catalytic activity and selectivity.

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Flue Gas Treatment

70 million wood and cofired equipment generate heat in the EU, and most of these are inefficient and polluting. This sector is responsible for 50% of the life threatening air pollution (CO, NOx, SOx, VOC, X VOC, PM), which causes: 400,000 deaths/year due to particulate matter (PM) (Deutsche Umwelthilfe EV) and 14,000 deaths/year due to CO poisoning (National Vital Statistics System. 2015). The EU is aware of the problem, therefore from 2022 only efficient and eco friendly firing equipment can be used. Our preventive, cheap and easily insertable catalytic brick can decrease pollution drastically and improved efficiency (proved by accredited tests ), resulted in mitigation of the risks of respiratory diseases as well as burning fuel savings. Also, we have solutions based on the same noble-metal free techniques for exhaust system cleaning of road and non-road moving machines.

Battery researches

We are testing high energy Li-batteries (e.g. panasonic 18650). The heat and high C charge-discharge tolerance tests as well as the connection beetween physical degradation and battery aging is tested with in situ as well as post mortem tests.

Photocatalytic CO2 activation and Water treatment

Gas phase batcvh reactor is used for photocatalytic as well as thermo-photocatalytic CO2 activation and waste water treatment with the usage of ZnO-, TiO2- as well as semiconduction nanoparticles.

Size controlled Nanoparticles & 3D mesoporous oxide supports in Surface Chemical Processes

Catalysis and other surface chemical processes in the 21st century targets 100% selectivity. Nanoparticles smaller than 10 nm posses much larger fractions of low coordination metal sites, which often dominate or even determine reactive chemistry. 3D mesoporous oxide supports with high surface area can tune catalytic performance via the ‘support effect’. This approach involves altering the choice of support (often a metal oxide) on which a metal catalyst is deposited in order to utilize a beneficial electronic or chemical interaction between catalyst and support. The interaction as well as the interface of the metal and support has been proven to have extremely favorable effects on catalytic performance.

EDUCATION

>50 Thesis, project and plan work supervision of Chemist BSc & MSc, Chemical Engineer MSc, Environmental Sciences BSc & MSc, Environmental Engineer BSc & MSc and Material Science BSc Students

Courses

Selective waste collection laboratory
Waste treatment
Environmental Technology
Nanotechnology and material science study laboratory
Chemical industrial procedures and machines seminary
Chemical technology laboratory
Environmental technology laboratory
Environmental technical procedures and machines seminary
Waste water treatment Tecgnologies
Nanotechnology Seminar and Laboratory
Basics of microscopy laboratory
Bulk and Surface Investigation Methods