Dr. Josephat Tanui

Position: Associate Dean SOE
School/Institute: Engineering
Department: Mechanical
Email:  josephat.tanui@dkut.ac.ke

Academic Qualifications

Qualification Institution Year
 PhD Mechanical Engineering  DeKUT  2020
 MSc. in Mechanical Engineering  Jomo Kenyatta University of Agriculture and Technology  2013
 BSc. in Mechanical Engineering  Jomo Kenyatta University of Agriculture and Technology  2009

Professional Qualifications

Qualification Institution Year
 Graduate Engineer  Engineers Board of Kenya (EBK)  2011
 Graduate Engineer  Institution of Engineers of Kenya (IEK)  2011

Areas of Expertise

Mechanical engineering – Combustion

Work Experience

  • June, 2015 – To Date: Lecturer – DeKUT
  • July, 2013 – May, 2015: Assistant Lecturer – DeKUT
  • May, 2012 – June, 2013: Tutorial Fellow – DeKUT
  • January, 2010 – April, 2012: Teaching Assistant – KUCT

Publications

Journal Publications

  1. J.K. Tanui, P.N. Kioni, T. Mirre, M. Nowitzki and N.W. Karuri, “The influence of particle packing density on wood combustion in a fixed bed under oxy-fuel conditions”, Energy, Vol. 194, 2020.
  2. J.K. Tanui, P. N. Kioni, T. Mirre, M. Nowitzki, D. A. Todorova, “Application of CFD-DEM method in modeling of wood combustion in a fixed bed” Bulgarian Chemical Communications, Vol. 52(3), 396-403, 2020.
  3. P. Wanjiru, N. Karuri, P. Wanyeki, P. Kioni and J. Tanui “Numerical simulation of the effect of diluents on NOx formation in methane and methyl formate fuels in counter flow diffusion flame” AIMS Environmental Science, Vol. 7(2): 140–152, 2020.
  4. J.K. Tanui, P.N. Kioni, T. Mirre and M. Nowitzki, “Chemical, thermal and dilution effects of carbon dioxide in oxy-fuel combustion of wood in a fixed bed”, Journal of Mechanical Science and Technology, Vol. 33(12), 6063-6073, 2019.
  5. J.K. Tanui, P.N. Kioni, T. Mirre and M. Nowitzki, “The effect of carbon dioxide on flame propagation speed of wood combustion in a fixed bed under oxy-fuel conditions,” Fuel Processing Technology, vol. 179, pp. 285-295, 2018.
  6. J.K. Tanui, P.N. Kioni, P.N. kariuki and J.M. Ngugi, “Influence of processing conditions on the quality of briquettes produced by recycling charcoal dust”, International Journal of Energy and Environmental Engineering, Doi:https://doi.org/10.1007/s40095-018-0275-7, 2018.
  7. J. M. Ngugi, P. N. Kioni, and J. K. Tanui, “Numerical Study of Nitrogen Oxides (NOx) Formation in Homogenous System of Methane, Methanol and Methyl Formate at High Pressures”, Journal of Clean Energy Technologies, Vol. 6, No. 1, January 2018.
  8. J. M. Ngugi, P. N. Kioni, and J. K. Tanui, “Numerical Study of Nitrogen Oxides (NOx) Formation in High-Pressure Diffusion Flames of Methane, Methanol and Methyl Formate”, Journal of Clean Energy Technologies, Vol. 6, No. 1, January 2018.
  9. J.K. Tanui, P.N. Kioni, and A. Gitahi “Numerical simulation of NO formation in methane, methanol and methyl formate in a homogeneous system,” Journal of Sustainable Research in Engineering, Vol. 1, No. 1, July 2014.
  10. P.N. Kioni, J.K. Tanui, and A. Gitahi “Numerical Simulations of Nitric Oxide (NO) Formation in Methane, Methanol and Methyl Formate in different Flow Configurations. Journal of Clean Energy Technologies, Vol. 1, No. 2, March 2013.

Conferences Proceedings

  1. J.K. Tanui, P.N. Kioni, T. Mirre, M. Nowitzki and N.W. Karuri, “A Numerical study of volatile matter generation from wood combustion in a fixed bed under O2/CO2 environment” Proceedings of 5TH Dekut International Conference on Science, Technology, Innovation and Entrepreneurship (STI&E), 2019.
  2. J.K. Tanui, P.N. Kioni, and A. Gitahi “Sensitivity Analysis of Methane, Methanol and Methyl Formate Freely Propagating Flame” Proceedings of KSEEE-JSAEM 2013 International Engineering Coference, 2013.
  3. J.K. Tanui and P.N. Kioni “The effect of fuel/air mixture composition on NO formation in methane, methanol and methyl formate freely propagating flames,” ISSN 2079-6226: Proceedings of 2012 Mechanical Engineering Conference on Sustainable Research and Innovation, 2012.

Poster

  1. J.K. Tanui, P.N. Kioni, T. Mirre and M. Nowitzki “Cooperation with Kenya – PhD research on numerical simulation of wood combustion in a laboratory fixed bed using CFD-DEM Approach”, poster in Forschung in Wildau – innovativ und praxisnah, 2018.

Awards, Scholarships and Recognitions

  1. DAAD scholarship award – Research Stays for University Academics and Scientists, 2017
  2. Babaroa Trust Awards -Best student, 2nd year BSc. mechanical engineering class (2006).
  3. Babaroa Trust Awards -Best student, 1st year BSc. mechanical engineering class (2005).

Research

a)Ongoing/Completed Researches

  1. Oxy-fuel combustion of wood in a fixed bed.
  2. Nitrogen oxides formation in biodiesel flames.
  3. Recycling agricultural waste into briquettes.

Postgraduate Thesis Supervision and Examination

  1. Doctorate
    • Erick Kemei (PhD Mechanical Engineering) – Ongoing
      Title – Detailed study of a premixed flame of unpurified biogas from kitchen waste under oxy-fuel environment.
    • Abel Nyakundi (PhD Mechanical Engineering) -Ongoing
      Title – Experimental and numerical modelling of premixed flame of jatropha oil under oxy-fuel conditions.
  2. Masters
    • Henry Misoi (MSc. Mechanical Engineering) – Ongoing
      Title – Pure-rotational coherent anti-stokes raman scattering study of carbon dioxide for combustion diagnostic.
    • Royston Kiraithe – (MSc. Mechanical Engineering) – Ongoing
      Title – Combustion and emission characteristics of a preheated biodiesel burner for small- scale application.
    • Mercy Kimwa – (MSc. Industrial and management Engineering) – Ongoing
      Title – Optimization of heat recovery from low pressure waste steam for maize drying.

Research Interests

  • Combustion and emission characteristics of biofuel.
  • Computational of solid, liquid and gas fuel flames.

Affiliation/Membership to Professional Bodies

  • Graduate engineer – EBK
  • Graduate engineer – IEK