Physical and mechanical characteristics of composite briquette from coal and pretreated wood fines  

作　　者：Adekunle Adeleke Jamiu Odusote Peter Ikubanni Olumuyiwa Lasode Madhurai Malathi Dayanand Pasawan 

机构地区：[1]Department of Mechanical Engineering,Landmark University,Omu-Aran,Nigeria [2]Department of Materials and Metallurgical Engineering,University of Ilorin,Ilorin,Nigeria [3]Department of Mechanical Engineering,University of Ilorin,Ilorin,Nigeria [4]Metal Extraction and Recycling Division,National Metallurgical Laboratory,Jamshedpur,India

出　　处：《International Journal of Coal Science & Technology》2021年第5期1088-1098,共11页国际煤炭科学技术学报（英文）

基　　金：This research was funded by The World Academy of Science(TWAS),FR:3240287331,Italy and The Council of Scientific and Industrial Research(CSIR FUND:P-81-1-09),India.

摘　　要：Melina wood torrefied at 260℃ for 60 min was agglomerated with lean grade coal fines into composite briquettes using pitch as binder.Torrefied biomass(3%-20%)and coal fines(80%-97%)were blended together to produce the composite briquettes under a hydraulic press(28 MPa).The briquettes were cured at 300℃.Density,water resistance,drop to fracture,impact resistance,and cold crushing strength were evaluated for the composite briquettes.The proximate,ultimate,and calorific value analyses were carried out according to different ASTM standards.Microstructural studies were carried out using scanning electron microscope and electron probe microanalyzer equipped with energy dispersive x-ray.Fourier Transform Infrared Spectrophotometer(FTIR)was used to obtain the functional groups in the raw materials and briquettes.The density of the composite briquettes ranged from 0.92 to 1.31 g/cm^(3) after curing.Briquettes with<10%torrefied biomass has good water resistance index(>95%).The highest cold crushing strength of 4 MPa was obtained for briquettes produced from 97%coal fines and 3%torrefied biomass.The highest drop to fracture(54 times/2 m)and impact resistance index(1350)were obtained for the sample produced from 97%coal and 3%torrefied biomass.The fixed and elemental carbons of the briquettes showed a mild improvement compared to the raw coal.The peaks from FTIR spectra for the briquettes shows the presence of aromatic C=C bonds and phenolic OH group.The composite briquettes with up to 20%torrefied biomass can all be useful as fuel for various applications.

关 键 词：Composite briquettes Lean grade coal Torrefied biomass Physico-mechanical properties Combustion properties 

分 类 号：TD82[矿业工程—煤矿开采]