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Electrochemical Valorization of Lignocellulosic Biomass Amination of Furfural and 5-Hydroxymethylfurfural
Donkeng Dazie, Joel ; Koláčná, Lucie ; Urban, Jiří ; Lamač, Martin ; Ludvík, Jiří
Furfural (FF) and 5-hydroxymethylfurfural (HMF) isolated from waste lignocellulosic biomass represent renewable sources. The present contribution deals with the transformation of FF and HMF into furfuryl amines which are important precursors namely for pharmaceutical synthesis. First, FF and HMF underwent condensation reactions with various amines which were electrochemically monitored to optimize the process. The resulting Schiff bases were identified by NMR and subsequently electrochemically reduced in basic media. The vicinal diamine (aminopinacol) was the main product besides the expected furfuryl amines. This reaction is a contribution to green synthesis because it was performed electrochemically, in water, and without any metallic catalysts.
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Organical chemicals from biomass
DOLEŽAL, David
This bachelor thesis deals with the processes of biomass as a renewable resource for the production of chemicals that could compete chemicals obtainable from fossil sources. Processing of biomass can be divided into two main approaches namely a thermochemical and biotechnological processing of biomass processes. This processing involves many processes such as hydrolysis, crushing, fermentation, combustion or high temperatures and pressures, and many other thermochemical or biotechnological processes associated with the nature of the structure of the biomass. As the most important products of biomass processing can be considered biofuels represented in my work mainly by ethanol, but also methanol and other organic chemicals such as furfural, levulinic acid and hydroxymethylfurfural derived from the processing of C5 and C6 sugars located in the fundamental structure of biomass. These organic chemicals can also serve as a chemical platform and subsequent modifications of them can get products with the same or very similar properties of the products of the petrochemical industry.
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Organic chemicals from biomass
POMIJOVÁ, Zuzana
This bachelor thesis follow up the issue of biotechnology of biomass in terms of use biomass as a feedstock for the production of applications for the chemical, food and energy industries. From a brief overview of some very basic, but most important, products, through the story of lignocellulosic rafineries, it is technology and the advantages and disadvantages to the third generation biofuels is a summary of the work of knowledge of Czech and foreign experts over the past few years. Part of this work are not only examples of already operate technologies and applications, as well as proposals that have unfortunately been put into practice, as well as the various challenges posed by the effort to replace conventional technologies, especially petrochemical, new technologies.
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