حسين وهمن طادي

Biomass is an acceptable and cheap resource that is abundant in nature. Production of alternative fuels or chemicals from biomass with the help of pyrolysis is one of the progressive ways to reduce fossil fuels. In this study, the kinetics of the pyrolysis process of pine wood as biomass and simulation of the process have been investigated and eva‎luated with the help of Aspen plus software. At first, after the description of some of the common models of pyrolysis reactions, the competitive reactions model has been chosen as the chosen model due to its commonness and optimized prediction. The use of this model requires obtaining the kinetic machines of other reactions, which are obtained by using the results of calorimetric analysis and the Lunberg-Marquardt optimization method for each reaction. In this research, it was developed by considering the preview factor as a function of the selected kinetic model. The percentage range of relative error predicted from the kinetic model in this research at a temperature of 600 degrees Celsius with experimental data in the range of 18-5-28. Placed. Using the developed form of Arrhenius, the range of relative error percentage of the formation of weight fraction of products is in the range of 0.046-1.886. If this method is not used and the kinetic constant is taken into account at all temperatures, the percentage of error is in the range of 0.095-31.896. The competitive reactions model used only predicts the amount of production of bio-oil⸲ incompressible gases and biochar obtained from the pyrolysis process. To complete the simulation of the process, using experimental data and GC-MS analysis, the substances present in the pyrolysis of pine wood are identified and the amount of formation of each substance is considered as a function of temperature in order to achieve the main components of the products in the simulation of the pyrolysis process of links. . There is also a temperature. After performing the modeling steps of pyrolysis reactions, this process was simulated in Aspen plus software. In the simulation section, the biomass enters the pyrolysis reactor after drying. In a calculation using the results of kinetic modeling and fitting the data of the ingredients of the final products, the rate of formation of bio-oil, incompressible gases, bio-char and also the components of each flow in each water selected for the pyrolysis reactor in the form of code in the calculator section. Fortran is written in Aspen plus software. After the formation of the products, first the biochar is separated, then the bio-oil and incompressible gases are separated by two stages of cooling. Incompressible gases enter a combustion reactor for economic efficiency and energy consumption reduction, and at the end, the pyrolysis process is considered economically for two proposals.

پيروليز , زيست توده , مدل سينتيكي , اسپن پلاس

Pyrolysis , Biomass , Kinetic model , Aspen plus

Hossein Vahman Taadi

Mohammad Amin Sobati