RT info:eu-repo/semantics/masterThesis
T1 Higher heating values of hydrotropic, hidrolytic and alkaline lignin from grape seeds and other types of biomass
A1 Pinilla de Dios, María
A2 Universidad de Valladolid. Escuela de Ingenierías Industriales
K1 Biomasa
K1 Ingeniería de Sistemas
AB Lignin is a natural polymer aromatic-based that exhibit interesting application both as a final product and as a source ofenergy and aromatic compounds. For decades lignin has been a discarded sub product of the pulp industry (black liquor)used basically as energy source for the pulp mill, creating a number of environmental problems. Currently a number ofproduction processes are available, i.e. alkaline extraction, Kraft, organosolv, hydrotrope extraction, hydrolysis in suband supercritical water, for instance. The Higher Heating Value (HHV) is a required parameter for the characterization ofthe biomass fractions. There are techniques to estimate HHV using the elemental composition and other parameters, butthis is an indirect method and requires the availability of the analytical techniques. In this work we determine the HHV ofthree types of lignin, alkaline (19.82 kJ/g), hydrotropic (26.54 kJ/g) and from subcritical water hydrolysis (26.19 kJ/g),also cellulose (16.31 kJ/g), anhydrous glucose (15.64 kJ/g), grape seeds (18.84 kJ/g) and extracted grape seeds (23.78kJ/g) by using an adiabatic combustion calorimeter and a combustion bomb. We propose the use of cellulose asagglomeration agent for the biomass and lignin, simplifying the pellet preparation process. Calibrations repeatability for astandard of Benzoic Acid was 1.9% and for a standard of Anhydrous Glucose was 3.4%. Finally, the average fromcalibrations was 2.6%.
YR 2012
FD 2012
LK http://uvadoc.uva.es/handle/10324/10364
UL http://uvadoc.uva.es/handle/10324/10364
LA spa
NO Departamento de Ingeniería Química y Tecnología del Medio Ambiente
DS UVaDOC
RD 23-nov-2024