Procesiranje stranskih produktov iz proizvodnje biodizla : doktorska disertacija
Processing of byproducts from biodiesel production : doctoral dissertation

slovenian

doktorska dela

2013

Univerza v Mariboru, Fakulteta za kemijo in kemijsko tehnologijo

In this doctoral dissertation one of a few possiblities of processing biodiesel production byproduct glycerol was studied. The glycerol was gasifiedin a high temperature and high pressure reactor above critical point of water. Gasification was performed at three different temperatures. Reactions were non-catalyzed and catalyzed with two catalysts. From obtained products mass balances were determined. Afterwards a comparison was made from product composition and gasification rate in dependance of temperature and reaction time, respectively. During gasification carbon depostied on the wallsof the reactor. Its removal from the system was also investigated with low pressure water steam. Results showed that this could be a relatively simple and economically suitable process for carbon removal from the system. Second part of the thesis represents phase equilibria of gasification products. With this data a separation process can be designed. Influence of process paramaters was investigated on the composition of the gas products fortheir further use in synthesis processes. Also phase equilibria at elevatedtemperatures and pressures of binary system of carbon monoxide/water was investigated. Results were modelled with Van der Waals equation of state. The third part covers upgrading of the gas products. The obtained gas mixture,composed of four gases, is to be used in the synthesis process. For that synthesis gas is needed, which is a mixture of carbon monoxide and hydrogen. Other two gases, methane and carbon dioxide, can be converted to syngas by dry reforming of methane. The process was also investigated at high temperatures and pressures by non-catalyzed and catalyzed reactions, with fourdifferent catalysts. Furthermore an analysis of gas products was performed and possible reactions taking place in the system are discussed.

07.08.2023