PROPERTIES AND COMPOSITION OF BIO-OIL HYDRODEOXYGENATION PRODUCTS

Pyrolysis bio-oil could be used as a second generation biofuel; however, its undesirable properties must be improved. A detailed analysis is necessary to optimize an upgrading process and understand the behaviour of bio-oils during their hydrodeoxygenation. Therefore, we introduced commonly used methods for the quantification of individual groups of oxygen compounds as carboxylic acids, ketones, aldehydes and phenols. In addition, we developed a GC-MS method for the quantification of semi-volatile oxygen compounds which provides reliable results. These analytical techniques allowed us to study the composition of a bio-oil from the ablative flash pyrolysis of straw and products of its hydrotreatment over a commercial sulphided NiMo/Al2O3 catalyst at different pressures.