Year-end Sale % OFF 
Abstract
The commercial COCO simulation program was used to mimic the experimental slow pyrolysis process of five different biomasses based on thermodynamic consideration. The program generated the optimum set of reaction kinetic parameters and reaction stoichiometric numbers that best described the experimental yields of solid, liquid and gas products. It was found that the simulation scheme could predict the product yields over the temperature range from 300 to 800 °C with reasonable accuracy of less than 10% average error. An attempt was made to generalize the biomass pyrolysis behavior by dividing the five biomasses into two groups based on the single-peak and two-peak characteristics of the DTG (derivative thermogravimetry) curves. It was found that this approximate approach was able to predict the product yields reasonably well. The proposed simulation method was extended to the analysis of slow pyrolysis results derived from previous investigations. The results obtained showed that the prediction errors of product yields were relatively large, being 12.3%, 10.6%, and 27.5% for the solid, liquid, and gas products, respectively, possibly caused by differing pyrolysis conditions from those used in the simulation. The prediction of gas product compositions by the simulation program was reasonably satisfactory, but was less accurate for predicting the compositions of liquid products analyzed in forms of hydrocarbons, aromatics and oxygenated fractions. In addition, information on the kinetics of thermal decomposition of biomass in terms of the variation of fractional conversion with time was also derived as a function of temperature and biomass type.
Highlights
Biomass-based fuels are non-fossil and renewable and are regarded as CO2 neutral, since a biomass can assimilate carbon dioxide from the atmosphere during its growth period
It is further noted that the chemical formula, shown in Table 1, for each biomass precursor was computed from its ultimate analysis data
The designated symbols P01, P02, P03, P04 and P05 indicate the set of simulation parameters pertaining to palm shell (PS), coconut shell (CS), palm kernel cake (PK), cassava pulp residue (CP) and longan fruit seed (LS), respectively
Summary
Biomass-based fuels are non-fossil and renewable and are regarded as CO2 neutral, since a biomass can assimilate carbon dioxide from the atmosphere during its growth period. Biomass is becoming increasingly important as a renewable source of energy. The primary biomass fuel is wood waste; other agricultural wastes, such as bagasse, straw, rice hull, and coconut shells are popularly used as fuel sources. The chemistry of biomass is complicated but the major components which can be isolated by analytical methods are cellulose, hemicelluloses, lignin, organics extractives, and inorganic materials [1]. Biomass is generally used on-site or a short distance off-site, due to its low bulk density. This is the reason why it is difficult to transport and use biomass in many
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
