STUDY OF THE PYROLYSIS KINETICS AND ENERGY CONTENT OF ACID WASHED RICE HUSK SAMPLE USING ISOCONVERSIONAL METHODS

Authors

  • Jabiru Musa Umaru Musa Yaradua University, Katsina
  • Ibrahim Sada
  • Ahmed Salisu
  • Abubakar Lawal

DOI:

https://doi.org/10.33003/fjs-2021-0503-749

Keywords:

Proximate and Ultimte Analysis, Thermogravimetry, Kinetic Model

Abstract

The rice husk was characterized by proximate and ultimate analysis. The proximate analysis was determined by moisture, volatile and ash content as 15.48%, 57.28% and 15.35% respectively. Ultimate analysis was determined using the data obtained from proximate analysis to calculate carbon, hydrogen, nitrogen and oxygen percentage as 43.67%, 4.64%, 0.956% and 35.78% respectively. The rice husk pyrolysis was studied by TGA/DTG analysis in a nitrogen atmosphere at flow rate of 60mL/minute, heating from 20.00 oC to 1000.00 oC at three different heating rates: 10, 15 and 20 oC/minute. The devolatilization and decomposition pattern portray by TGA curve for all the samples were almost the same, however, different peak temperatures were shown by DTG curve differently for all the samples at different heating rates. The sample RHC ran at three different heating rates: 10, 15 and 20 oC/minute with peak temperatures of 260.85 oC, 318.14 oC and 358.57 oC respectively. While the acid modified samples RHL and RAA at the same heating rates of 10, 15 and 20 oC/minute with peak temperatures of 402.05 oC, 343.91 oC and 280.76 oC respectively for sample RHL. And 399.34 oC, 325.59 oC and 282.61 oC respectively for sample RAA. Three kinetic models were used in this research, which are known as model fit methods for kinetics. The models are Flynn Wall Ozawa (FWO), Kissinger Akahira Sunose (KAS) and Coats Redfern methods. The KAS and FWO methods were used for the determination of activation energy and C-R method for the reaction mechanisms

References

Adediji A. T., Mandeep J. S., Ismail M. (2014). Meteorological characterization of effective earth radius factor (k-factor) for wireless radio link over Akure, Nigeria. Journal of Meteorological Society of India. 29, p131. DOI:10.1007/s12647-013-0074-9.

Adediji A. T., Ajewole M. O., Falodun S. E. (2011). Distribution of Radio Refractivity Gradient and Effective Earth Radius Factor (k-factor) over Akure, South Western Nigeria. Journal for Atmospheric and Solar-Terrestrial Physics, 73: 2300-2304.

Ajileye O. (2019). Scaled-up Analysis of Surface Refractivity across West Africa. (July).

Ajileye O. O. (2016). Dependence of Surface Refractivity Gradient Variation on Precipitation in the Tropical West Africa; IOSR Journal of Applied Physics, 8(3) pp57-65, www.iosrjournals.org.

Ali S., Malik S. A., Alimgeer K. S., Khan S. A., Ali R. L. (2012). Statistical estimation of tropospheric radio refractivity derived from 10 years meteorological data. J. Atmos. Solar-Terrestrial Phys. 77:96-103.

International Telecommunication Union, 1970–1986–1990–1992–1994–1995– 1997–1999–2001–2003. The radio refractive index: its formula and refractivity data. Recommendation ITU-R, pp. 453–459

IPCC (2007). Working Group II - Contribution to the Intergovernmental Panel on Impacts, Adaptation and Vulnerability of the Environment on Climate Change, Fourth Assessment Report. Summary for policymakers, Brussels.

ITU-R (2004). The refractive index: its formula and refractivity data. pp. 453-459.

ITU-R (2012). “The radio refractivity index: its formula and refractivity data,†International Telecommunication Union, Geneva. p.453.

Nyong A. (2005). Drought-Related Conflicts, Management and Resolution in the West African Sahel; Human Security and Climate Change An International Workshop Oslo, Norway.

Radha K. R., Purnachandra R. M. and Murthy R. A. (2007). Addendum to “Study on Coastal Atmospheric Effects on Line-of-Sight Links Located in Visakhapatnamâ€. AU Journal, Faculty of Information Technology, Multimedia,University Cyberjaya, Selangor, Malaysia. 10(4) pp. 276 – 281.

Thayer G. D. (1974). An improved equation for radio refractive index of air, Radio Science, 9(10) Pp 803 – 807.

Published

2021-11-03

How to Cite

Musa, J., Sada, I., Salisu, A., & Lawal, A. (2021). STUDY OF THE PYROLYSIS KINETICS AND ENERGY CONTENT OF ACID WASHED RICE HUSK SAMPLE USING ISOCONVERSIONAL METHODS. FUDMA JOURNAL OF SCIENCES, 5(3), 237 - 146. https://doi.org/10.33003/fjs-2021-0503-749

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