I have visited VTT during the past three weeks and it was a pleasure. The VTT facility I have worked in is Biorukki, and is focused on waste to energy technologies in larger scales. I have used the lab-scale gasification facility to run the tests. 

In total we have performed 6 tests using RDF (Refused derived fuel) in the fluidized bed gasifier, applying different conditions in each test (reactor temperature, equivalence ratio, bed material, filter temperature). Steady state was maintained for at least four hours. 

Online measurement of main product gases (CO, CO2, H2, CH4) was performed, and samples of minor contaminants in gas phase (HCl, NH3, H2S, HCN) and tars were taken multiple times during the test. In the end of the tests the bed material was recovered and sent to analysis of trace elements (metals). 

My focus is on the gasification conditions effect, as well as filter temperature on the partitioning of contaminants precursors (i.e. Cl, N and S) and in the volatilization of trace elements during gasification. The results of off-line measurements will hopefully shed some light in this subject, which is especially complex when dealing with waste-derived fuels.  

During my stay at VTT Biorukki I achieved a remarkable milestone for my PhD, since with their knowledge, structure and personal, I was able to run gasification tests, which will be crucial to my thesis. I could learn how to operate a gasification plant at steady state, all challenges regarding it, how to plan ahead for the test, as well as the learning from the process during the test run. 

Therefore, I am so grateful for this opportunity Brisk2 project has offered me and I am committed to get the most from this experience. Results are planned to be included in my thesis as well as to be published in joint publications with VTT.