Mathematical Modeling of a Fluidized Bed Rice Husk Gasifier: Part III - Model Verification

Mansaray, A. E. Ghaly K. G.

doi:10.1080/00908310050014063

Cited by 23 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence the need for thermodynamic predictions of product yield. Also different kinds of simulation and kinetic models for energy recovery from rice residues have been developed and validated (Mansaray et al 2000a;2000b;2000c;Nikoo and Mahinpey, 2008) but they have come in the domain of gasification.…”

Section: Introductionmentioning

confidence: 99%

A Thermodynamic Study of Rice Husk (Oryza Sativa) Pyrolysis

Adeniyi

Odetoye

Titiloye

et al. 2019

European Journal of Sustainable Development Research

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

A Thermodynamic Study of Rice Husk (Oryza Sativa) Pyrolysis

Adeniyi

Odetoye

Titiloye

et al. 2019

European Journal of Sustainable Development Research

View full text Add to dashboard Cite

show abstract

“…For numerous biomass samples, kinetics and reaction sequence has been exhaustively examined [19]. Several theoretical in silico models for energy recovery from rice husk have also been developed and validated [20][21][22][23] over the years using a variety of approaches.…”

Section: Introductionmentioning

confidence: 99%

Modelling of integrated processes for the pyrolysis and steam reforming of rice husk (Oryza sativa)

2019

View full text Add to dashboard Cite

Thermochemical processes can be used to harness the energetic content of agricultural residues. This study utilises ASPEN Plus v8.8 to develop thermodynamic models for pyrolysis and in-line steam reforming of rice husk (Oryza sativa). The pyrolysis simulation at 500 °C and 1 atm gave a product yield of 36.3% oil, 49.6% char and 14.1% gas. Whilst the gas was composed of lighter hydrocarbons, the char was primarily elemental carbon and SiO 2. The pyrolysis oil was composed of higher hydrocarbons, an assortment aromatic compounds and pyrolytic water. Optimum parameters for the steam reforming process were 700 °C, 1 atm and a steam-togas molar ratio of 7. The product composition at optimal conditions was 67% hydrogen gas, 19% carbon dioxide, 12% carbon monoxide and 2% methane. For a theoretical biomass feed of 200 kg/h and steam feed of 1400 kg/h, the synthesis gas flowrate obtained from the process was 204 kg/h and the rest were char and condensate water. This has gone a long way to reinforce our idea that the energy content of locally sourced rice (O. sativa) husk can be harnessed via different thermochemical techniques to give good yields of very useful products.

show abstract

“…However, the work on biomass gasification is less extensive. Mansaray et al [5] used Aspen Plus to simulate rice husk gasification in a dual fluidized bed. They reported a reasonable prediction of the gasifier characteristics and combustible gas components.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Enriched Air-Steam Biomass Gasification in a Bubbling Fluidized Bed Gasifier

Niu¹,

Huang²,

Jin³

2014

AMM

View full text Add to dashboard Cite

A model was developed for the enriched air-steam biomass gasification in a bubbling fluidized bed (BFB) gasifier using Aspen Plus. Restricted equilibrium method was used to eliminate the deviation caused by the diffusion effect of gas-particle. The model has been divided into three stages (drying and pyrolysis, partial combustion and gasification) for predicting the gasifier performance. Simulation results for gas composition, carbon conversion and cold gas efficiency versus oxygen percentage and steam to biomass ratio (S/B) were compared with the experimental results. Higher oxygen percentage improves the gasification process, increases the production of H2 and CO and results in better gasification efficiency. With increasing oxygen percentage, the production of CO2 and CH4 show decreasing trends. Steam injection enhances the H2 and CO2 production but decreases CO and CH4 production. Carbon conversion presents a slight decrease trend over the S/B range, while cold gas efficiency is first constant and then decreased.

show abstract

Mathematical Modeling of a Fluidized Bed Rice Husk Gasifier: Part III - Model Verification

Cited by 23 publications

References 0 publications

A Thermodynamic Study of Rice Husk (Oryza Sativa) Pyrolysis

A Thermodynamic Study of Rice Husk (Oryza Sativa) Pyrolysis

Modelling of integrated processes for the pyrolysis and steam reforming of rice husk (Oryza sativa)

Simulation of Enriched Air-Steam Biomass Gasification in a Bubbling Fluidized Bed Gasifier

Contact Info

Product

Resources

About