Optimization of bio-oil production parameters from the pyrolysis of elephant grass (Pennisetum purpureum) using response surface methodology  

作　　者：Sunday C.Ikpeseni Samuel O.Sada Ufuoma J.Efetobor Henry O.Orugba Mathias Ekpu Hilary I.Owamah Jeremiah L.Chukwuneke Solomon Oyebisi Uche P.Onochie 

机构地区：[1]Department of Mechanical Engineering,Delta State University,P.M.B.1,Abraka,Nigeria [2]Department of Mechanical Engineering,Delta State Polytechnic,P.M.B.3,Otefe-Oghara,Nigeria [3]Department of Chemical Engineering,Delta State University,P.M.B.1,Abraka,Nigeria [4]Department of Civil Engineering,Delta State University,P.M.B.1,Abraka,Nigeria [5]Department of Mechanical Engineering,Nnamdi Azikiwe University,P.M.B.2025,Awka,Nigeria [6]Department of Civil Engineering,Covenant University,P.M.B.1023,Otta,Nigeria [7]Department of Civil Engineering,The University of the South Pacific,P.M.B.9072,Suva,Fiji [8]Department of Mechanical Engineering,Delta State University of Science and Technology,P.M.B.5,Ozoro,Nigeria

出　　处：《Clean Energy》2024年第5期241-251,共11页清洁能源（英文）

摘　　要：The need to increase bio-oil yield from biomass and enhance its fuel properties has driven research into optimizing the pyrolysis process.This study investigated the influence of three key process parameters—temperature,heating rate,and nitrogen flow rate—on the pyrolysis of elephant grass(Pennisetum purpureum)in a fixed-bed reactor.Response surface methodology was used to study the im-pact of the aforementioned variables on bio-oil yield to improve its production efficiency.Proximate analysis of the biomass revealed 79.24 wt%volatile matter,14.22 wt%fixed carbon,and 5.86%ash,with ultimate analysis showing 45.44%carbon,5.59%hydrogen,and 40.95%oxygen.The high volatile matter content and favourable carbon and hydrogen percentages indicate that elephant grass is a vi-able energy source due to its potential for high bio-oil yield and energy content.The resulting bio-oil exhibited a higher heating value of 20.9 MJ/kg,indicating its suitability for various heating applications.A second-order regression model was developed for bio-oil yield,with optimal conditions identified as a temperature of 550°C,a heating rate of 17°C/min,and a nitrogen flow rate of 6 ml/min.The study achieved an optimal bio-oil yield of 59.03 wt%,and the model’s high R²value of 0.8683 from analysis of variance analysis confirmed its predictive accuracy.This research highlights elephant grass as a sustainable feedstock for bio-oil production,offering valuable insights into optimizing pyrolysis conditions to enhance bio-oil yield,thus advancing biofuel technology.

关 键 词：renewable energy BIOMASS sustainable feedstock regression model fixed-bed reactor 

分 类 号：TK01[动力工程及工程热物理] X382[环境科学与工程—环境工程]