Computer aided modelling of low density polyethylene pyrolysis to produce synthetic fuels

2019

SN Appl. Sci.

Pyrolysis has been established as a good technique of recovering energy from biomass. In this study, a thermodynamic model was developed on ASPEN Plus V8.8 to study the temperature sensitivity and yield of products from the pyrolysis of different banana wastes. The wastes considered were banana peels, pseudo-stem and leaves. The model was validated with experimental results for pseudo-stem pyrolysis. From comparison, the pseudo-stem was observed to give a slightly higher yield of gas compared to the other residues. Thermodynamic predictions of gas yield are similar for the different feedstock at low temperatures but varying at higher temperatures with the leaves producing less. Furthermore, the yield of oil from leaves is less and that of char is higher than for the other residues. The fluid phase products (bio-oil and syn-gas) were higher for pseudo-stem than for the other residues due to greater proportion of volatile matter from the proximate analysis. The suitability of banana pseudo-stem for bio-oil production via pyrolysis is established in comparison with the other residues studied. The leaves and peel are more suitable for low-temperature thermochemical processing for bio-char production.

Section: Introductionmentioning

confidence: 99%

Thermodynamic modelling and temperature sensitivity analysis of banana (Musa spp.) waste pyrolysis

Ighalo

2019

SN Appl. Sci.

“…This was not necessarily the point of interest in previous gasification modeling studies. We previously utilized in silico platforms to investigate biofuel development via the thermochemical processing of waste lubricating oil, sugarcane bagasse, banana residues, rice husks, acetic acid, glycerol, and waste plastics . In this study, the thermochemical processing of poultry litter was studied via a thermodynamic model.…”

Section: Introductionmentioning

confidence: 99%

“…We previously utilized in silico platforms to investigate biofuel development via the thermochemical processing of waste lubricating oil, 20,21 sugarcane bagasse, 22 banana residues, 23,24 rice husks, 25,26 acetic acid, 27 glycerol, 28 and waste plastics. 29 In this study, the thermochemical processing of poultry litter was studied via a thermodynamic model. Pyrolysis, in-line stream reforming, and gasification processes were investigated using models that had already been validated.…”

Section: Introductionmentioning

confidence: 99%

Modeling the valorization of poultry litter via thermochemical processing

Biofuels Bioprod Bioref

Ighalo

Onifade

et al. 2019

Waste management via thermochemical processing is gaining increasing importance as larger volumes of solid waste are generated yearly. The poultry industry generates a variety of wastes, of which the largest stream in terms of volume is the litter. In this study, three thermodynamic models were developed on ASPEN Plus v8.8 for pyrolysis, in‐line steam reforming, and gasification of poultry litter. At optimal pyrolysis of 450 °C, the product yield was 43.74 wt% bio‐oil, 6.71 wt% gas, and 49.55 wt% char. The optimal conditions for the in‐line steam reforming of poultry litter were observed to be 400 °C temperature and 12 kg kg−1 steam‐to‐feed ratio (STFR), yielding a syngas composition of 70.2 mol% H2, 29.4 mol% CO2, 0.22 mol% CH4, and a trace amount of CO. The optimal conditions for the gasification of poultry litter were 700 °C temperature and 0.2 kg kg−1, yielding a syngas composition of 52.6 mol% H2, 10.3 mol% CO2, 2.77 mol% CH4 and 34.3 mol% CO. Gasification gave a higher syngas yield but with less quality. Steam reforming gave better quality but a lower yield. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd

“…Advantages of using the software for modelling includes fast and accurate calculations (including rigorous and iterative ones), optimisations, easier imposition of design specifications and constraints and better sensitivity analysis. It can be used for process design, modelling and integration (Adeniyi et al 2018b(Adeniyi et al , 2018cMagnusson, 2005;Ward et al, 2014;Ye et al, 2009), feasibility studies (Naidoo, 2018), thermodynamic analysis (Adeniyi and Ighalo, 2018;Goicoechea et al, 2015;Xie et al, 2014), life cycle assessment (Altayeb, 2015;Peters et al, 2015;Sajid et al, 2016), energy and exergy analysis (Ofari-Boateng et al, 2012), green-house-gas assessment (Martinez-Hernandez et al, 2014), cost analysis (Santana et al, 2010) among other industrial applications and research application (Adeniyi et al, 2018a;Onarheim et al, 2014;Wang et al, 2011;Yan and Zhang, 1999).…”

Section: Methodsmentioning

confidence: 99%

A Thermodynamic Study of Rice Husk (Oryza Sativa) Pyrolysis

European Journal of Sustainable Development Research

Odetoye

Titiloye

et al. 2019

Rice (Oryza sativa) is one of the major agricultural products of tropical West Africa in general and Nigeria in particular. In this study ASPEN plus V8.8 was used to develop a thermodynamic model for the pyrolysis of rice husk. The model was validated and found to be accurate especially on the domain of oil and gas yields. It was used to study the effect of temperature on the product yield and oil composition. The fluid products increase with temperature and an optimum of 60% can be obtained from rice husk. The optimum oil yield was 44.2% obtained at 400°C. The synthesis gas was composed basically of hydrogen gas, methane and traces of higher hydrocarbons, the char consisted of carbon and silicon oxide ash while the oil was madeup of acidic organic compounds, aldehydes, pyrolytic water and others. At 600°C, the predictions revealed an oil composition of 84.7% acids, 7.9% pyrolytic water, 7.42% aldehyde and traces of alcohol and other compounds. The results from the thermodynamic predictions showed that rice husk is an excellent feedstock for the biofuels production via the thermo-chemical energy conversion route. The study has provided a useful framework for proper comparisons of the energy potential between different biomass feedstock.