Potentials of Torrefied Pine Sawdust as a Renewable Source of Fuel for Pyro-Gasification: Nigerian and South African Perspective

The impacts of fossil energy on the climate and environment emphasize the need for alternative energy resources. The use of waste wood is one such method to potentially reduce fossil-based energy dependence. However, raw biomass fuel properties are generally poor and unpredictable, thus requiring pretreatment to maximize their energy potentials for an efficient conversion to syngas via pyro-gasification. Two species of pine sawdust (PSD) wastes generated in abundance from large-scale timber industries in Nigeria and South Africa were investigated for improvements in their fuel properties after torrefaction. Samples were torrefied under optimum conditions of 300 °C and 45 min. Different analytical procedures show that the higher heating value (HHV), enhancement factor, energy density, and solid yield of the Nigerian PSD exceeded those of their South African counterpart by 2.38, 5.37, 3.49, and 11.15%, respectively. The HHV of the torrefied fuels increased by 57.29 and 37.9% for the Nigerian and South African PSDs, respectively, when compared to the raw fuels. Also investigated were improvements in their H/C and O/C ratios and thermal degradation at varied heating rates.

[1]  K. Harding,et al.  Pyro-gasification of Invasive Plants to Syngas , 2020 .

[2]  B. Oboirien,et al.  Performance evaluation of gasification system efficiency using artificial neural network , 2020 .

[3]  J. Speight.  Hydrocarbons from biomass , 2020, Handbook of Industrial Hydrocarbon Processes.

[4]  M. Daramola,et al.  Techno-economic analysis of electricity and heat production by co-gasification of coal, biomass and waste tyre in South Africa , 2018, Journal of Cleaner Production.

[5]  M. Daramola,et al.  Dataset on the assessment of the environmental, economic and energy parameters of 5 MW CHP co-gasification plant using South African coal, biomass and waste-tyre , 2018, Data in brief.

[6]  O. Adeniyi,et al.  Impact of torrefaction on fuel property of tropical biomass feedstocks , 2018 .

[7]  Ayotunde A. Awosusi,et al.  Biocompositional and thermodecompositional analysis of South African agro-waste corncob and husk towards production of biocommodities , 2017 .

[8]  F. Chejne,et al.  Detailed Investigation into Torrefaction of Wood in a Two-Stage Inclined Rotary Torrefier , 2017 .

[9]  Manoj K. Raut,et al.  The Effect of Torrefaction Pre-Treatment on the Gasification of Biomass , 2016 .

[10]  C. O. Folayan,et al.  Characterization of Some Nigerian Coals for Power Generation , 2016 .

[11]  V. Vassilev,et al.  Advantages and disadvantages of composition and properties of biomass in comparison with coal: An overview , 2015 .

[12]  Wei Hsin Chen,et al.  Torrefaction operation and optimization of microalga residue for energy densification and utilization , 2015 .

[13]  Temitayo E Oladimeji,et al.  Compositional Analysis of Lignocellulosic Materials: Evaluation of an Economically Viable Method Suitable for Woody and Non-woody Biomass , 2015 .

[14]  D. Silva,et al.  Dilute-acid Hydrolysis of Cellulose to Glucose from Sugarcane Bagasse , 2014 .

[15]  Tobias Richards,et al.  Nigerian Wood Waste : A Dependable and Renewable Fuel Option for Power Production , 2014 .

[16]  K. Okazaki,et al.  Gasification characteristic of large wood chars with anisotropic structure , 2014 .

[17]  Mohd Wazir Mustafa,et al.  Status of renewable energy consumption and developmental challenges in Sub-Sahara Africa , 2013 .

[18]  C. J. Diji,et al.  Electricity Production from Biomass in Nigeria: Options, Prospects and Challenges , 2013 .

[19]  M. U. Garba.  Prediction of ash deposition for biomass combustion and coal/biomass co-combustion , 2012 .

[20]  Jun Li,et al.  Co-firing based on biomass torrefaction in a pulverized coal boiler with aim of 100% fuel switching , 2012 .

[21]  L. I. Darvell,et al.  Combustion and gasification characteristics of chars from raw and torrefied biomass. , 2012, Bioresource technology.

[22]  H. Tan,et al.  Prediction of Potassium Chloride Sulfation and Its Effect on Deposition in Biomass-Fired Boilers , 2012 .

[23]  C. Yin.  Prediction of higher heating values of biomass from proximate and ultimate analyses , 2011 .

[24]  Prabir Basu,et al.  Biomass Gasification and Pyrolysis: Practical Design and Theory , 2010 .

[25]  S. Sadaka,et al.  Improvements of biomass physical and thermochemical characteristics via torrefaction process , 2009 .

[26]  S. Channiwala,et al.  A correlation for calculating HHV from proximate analysis of solid fuels , 2005 .

[27]  P.C.A. Bergman,et al.  Torrefaction for biomass co-firing in existing coal-fired power stations BIOCOAL , 2005 .

[28]  S. Channiwala,et al.  A UNIFIED CORRELATION FOR ESTIMATING HHV OF SOLID, LIQUID AND GASEOUS FUELS , 2002 .

[29]  Peter McKendry,et al.  Energy production from biomass (Part 1): Overview of biomass. , 2002, Bioresource technology.

[30]  Ayhan Demirbas,et al.  Relationships between lignin contents and heating values of biomass , 2001 .

[31]  G. Maltitz,et al.  Issues and opportunities for small-scale sawmilling in South Africa – An Eastern Cape case study , 2000 .

[32]  Colomba Di Blasi,et al.  Product Distribution from Pyrolysis of Wood and Agricultural Residues , 1999 .

[33]  E. Maekawa,et al.  An evaluation of the acid-soluble lignin determination in analyses of lignin by the sulfuric acid method , 1989 .