Simulation of biomass and municipal solid waste pellet gasification using aspen plus

Diallo, Amadou Dioulde Donghol and Al-Khatib, Ma An Fahmi Rashid and Alam, Md. Zahangir and Maizirwan, Mel (2021) Simulation of biomass and municipal solid waste pellet gasification using aspen plus. In: 6th International Conference on Biotechnology Engineering 2021, Kuala Lumpur, Malaysia (Virtual). (Unpublished)

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Abstract

The work deals with the simulation of biomass and municipal solid waste pellet gasification using ASPEN PLUS software. The effects of key parameters on the composition of the emitted gas are discussed, including gasification temperature, moisture content, and equivalence ratio. The sensitivity analysis was studied with the Aspen Plus Software, which includes FORTRAN modules. The simulation is validated using experimental results, which revealed that it was roughly correct. Using air as the gasification agent, the sensitivity analysis findings confirm higher temperatures promote syngas production with increased hydrogen and energy content. The simulation results demonstrated that CO2 concentration (3.95%) increases from 450°C to 600°C and then decreased drastically near 0.225kmol/hr. at 900°C. As the gasification temperature rises from 450°C to 900°C, the CO concentration rises and the H2: CO ratio falls. At 900°C, increasing the gasification temperature results in a product gas with more H2 (65%) and CO (12.43%), resulting in a higher calorific value, whereas the contents of CH4, CO2, and H2O followed an inverse correlation. CH4 decreased with temperature because of the formation of exothermic methane reactions. When the gasification process reaches 800°C, all components except CO2 become steady, and gasification reactions were achieved. The equivalence ratio (ER) ranged from 0.2 to 0.3. The gas produced by a gasifier is highly dependent on the ER value. The ER determines the gas quality, and it must be less than 1 to ensure that it gasifies the fuel rather than burnt. Moisture content was 10wt. %, this is an essential parameter for the optimum conditions during the gasification process. Moisture content determines the gas characteristics at the exit phase. The model predictions and calculated values are in good agreement.

Item Type:	Conference or Workshop Item (Plenary Papers)
Uncontrolled Keywords:	Biomass; Municipal solid waste; Gasification; Simulation; ASPEN Plus
Subjects:	T Technology > TD Environmental technology. Sanitary engineering > TD785 Municipal refuse. Solid waste T Technology > TJ Mechanical engineering and machinery > TJ807 Renewable energy sources
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Biotechnology Engineering
Depositing User:	Dr. Ma'an Alkhatib
Date Deposited:	17 Nov 2021 10:49
Last Modified:	17 Nov 2021 10:49
URI:	http://irep.iium.edu.my/id/eprint/93817

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