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

International Journal of Coal Science & Technology 2021年第5期8卷 1088-1098页

作者： Adekunle Adeleke Jamiu Odusote Peter Ikubanni Olumuyiwa Lasode Madhurai Malathi Dayanand Pasawan Department of Mechanical Engineering Landmark UniversityOmu-AranNigeria Department of Materials and Metallurgical Engineering University of IlorinIlorinNigeria Department of Mechanical Engineering University of IlorinIlorinNigeria Metal Extraction and Recycling Division National Metallurgical LaboratoryJamshedpurIndia

Melina wood torrefied at 260℃ for 60 min was agglomerated with lean grade coal fines into composite briquettes using pitch as *** 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 *** proximate,ultimate,and calorific value analyses were carried out according to different ASTM *** studies were carried out using scanning electron microscope and electron probe microanalyzer equipped with energy dispersive *** Transform Infrared Spectrophotometer(FTIR)was used to obtain the functional groups in the raw materials and *** density of the composite briquettes ranged from 0.92 to 1.31 g/cm^(3) after *** with95%).The highest cold crushing strength of 4 MPa was obtained for briquettes produced from 97%coal fines and 3%torrefied *** 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 *** fixed and elemental carbons of the briquettes showed a mild improvement compared to the raw *** peaks from FTIR spectra for the briquettes shows the presence of aromatic C=C bonds and phenolic OH *** 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

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Characterization of bio-coal briquettes blended from low quality coal and biomass waste treated by Garant■bio-activator and its application for fuel combustion

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International Journal of Coal Science & Technology 2020年第4期7卷 796-806页

作者： Anggoro Tri Mursito Widodo Danang Nor Arifin Research Centre for Geotechnology Indonesian Institute of Sciences(LIPI)Jl.Sangkuriang Komplek LIPIGd.70Bandung 40135Indonesia Assessment Unit for Mining Engineering Jampang Kulon.Indonesian Institute of Sciences(LIPI) Jl.CihaurSimpenan.SukabumiIndonesia

Experimental research was carried out on the manufacturing of bio-coal briquettes from a blend of two different types of low-quality coal and biomass waste in the absence of coal carbonization,where the third blend of the material was fermented by adding a bio-activator solution before pressurizing the components into *** coal samples from Caringin-Garut Regency(BB-Garut)had a low calorific value and a high sulfur content(6.57 wt%),whereas the coal samples from Bayah-Lebak Regency(BB-Bayah)had a higher calorific value and a lower sulfur content(0.51 wt%).The biomass added to the coal blend is in the form of fermented cow dung(Bio-Kohe),and it had a calorific value of 4192 kcal/kg and a total sulfur content of 1.56 wt%.The main objective of this study is to determine the total decrease in the sulfur content in a blend of coal and biomass in which a fennentation process was carried out using a bio-activator for 24 *** used bio-activator was made from Garant■(1:40)+molasses 1 wt%/vol,and its used amount was 0.2 L/***,the total sulfur content in the blend was 1.00 wt%-1.14 wt%,which fulfills the necessary quality requirements for non-carbonized bio-coal *** pyritic and sulfate content in the raw coal was dominant,and the organic sulfur,when fermented with Garant■,was found to be less in the produced bio-coal briquettes by 38%-58%.

关键词： Coal blending Biomass waste Fermentation Briquettes material combustion properties

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