Análisis de gases desprendidos de residuos industriales de yuca (Manihot esculenta).

Introduction- The pyrolysis of agro-industrial waste is an alternative to produce second generation liquid fuels. Objective-Determine the kinetics in the pyrolysis process of cassava industrial waste as well as of evolved product formation. Methodology- Pyrolysis of waste from cassava starch processing was studied via thermogravimetric analysis coupled to mass spectrometry. Thermogravimetric data were adjusted to the distributed activation energy model with one pseudocomponent. Results- Pyrolysis of samples heated at ramps below 30 K/min showed kinetics parameters with different values from the ones obtained for the samples heated at ramps above 50 K/min. This suggests a change in the pyrolysis reaction mechanism linked to heating rate. The kinetics parameters obtained in this work are in agreement with values reported for other biomass in literature. From the evolved gases, 23 m/z signals were identified with enough signal/noise ratio. Mass spectrometry signals were also adjusted with the distributed activation energy model using the kinetics parameters obtained from thermogravimetric data. Conclusions- Satisfactory results were achieved with the DAEM model with one pseudocomponent for most of m/z ratio. The lack of adjustment in some m/z ratio can be attributed to secondary reactions in the gas phase. [ABSTRACT FROM AUTHOR]