Quality Assessment of the Permian Coals from Dighipara Basin, Bangladesh Based On Proximate, Ultimate and Microscopic Analyses

Assessment of coal quality based on proximate (volatile matter, fixed carbon, ash, moisture), ultimate (C, H, N, S, O) and microscopic (macerals, microlithotypes, coal facies) analyses of the Permian coals from the Dighipara basin, Bangladesh was carried out. A total of 11 coal core samples collected from two bore holes of Dighipara basin were analyzed. ASTM standards were followed for proximate and ultimate analyses. ICCP systems were used for the microscopic study. Thermal maturity, physical characteristics of the coal seams, gross calorific value and atomic ratios of H/C and O/C were also considered.Journal of Bangladesh Academy of Sciences, Vol. 39, No. 2, 177-194, 2015

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Hydrogen and Syngas Generation from Gasification of Coal in an Integrated Fuel Processor

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.625.644 ◽

2014 ◽

Vol 625 ◽

pp. 644-647 ◽

Cited By ~ 1

Author(s):

Sujan Chowdhury ◽

Abrar Inayat ◽

Bawadi Abdullah ◽

Abdul Aziz Omar ◽

Saibal Ganguly

Keyword(s):

Coal Gasification ◽

Fixed Bed ◽

Calorific Value ◽

Volatile Matter ◽

Proximate Analysis ◽

Fixed Carbon ◽

Gross Calorific Value ◽

Fuel Processor ◽

New Energy

Hydrogen is a clean and new energy carrier to generate power and effectively turned out through the gasification of organic material such as coal. The main objective of this manuscript is to present an analysis of the coal gasification for the generation of high-purity hydrogen in a lab-scale fixed-bed downdraft gasifier. Better understanding of the rank, formation, structure, composition and calorific value and method of analysis of the material is crucial for the proper utilization of these resources requires. Traditionally the quality of the Coal samples has been determined by their physical and proximate analysis, such as, bulk density, free swelling index, gross calorific value, sulfur, moisture, fixed carbon, volatile matter and ash content. In this study, coal is partially oxidized and ultimately converts into hydrogen rich syngas (CO and H2). As well, approximately 220 kg h−1 of coal would be gasified at 673–1073 K and 46.2 atm with the reactor volume 0.27m3 to obtain approximately 3.8×105 kcal h−1 of thermal energy during over 67% syngas generation with the generation of 110kW electrical powers.

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Effect of Fuel Material Compositions on Combustion Properties of Wood Chips from Smallhold Farm Plots in a Sudano-Sahelian Environment of Nigeria

Current Journal of Applied Science and Technology ◽

10.9734/cjast/2020/v39i230502 ◽

2020 ◽

pp. 93-104

Author(s):

O. A. Sotannde ◽

A. M. Dadile ◽

M. Umar ◽

S. M. Idoghor ◽

B. D. Zira

Keyword(s):

Moisture Content ◽

Tree Species ◽

Calorific Value ◽

Volatile Matter ◽

Wood Chips ◽

Fixed Carbon ◽

Gross Calorific Value ◽

Energy Value ◽

Combustion Properties ◽

Fuel Material

Aims: The study explored the combustion properties of woods and barks of some selected trees and the mixtures of the two in order to map out how fuel material composition affect the combustion properties of biomass materials. Study Design: The study is a two-factor factorial experiment in a completely randomized design. The main factors are the tree species and fuel material types. Place and Duration of Study: Tree samples used for this study were coppiced stems harvested from smallhold farm plots along the Damaturu - Gujba fuelwood corridors in Yobe State. The analytical study was carried out in Wood and Fibre Science Laboratory of the Department of Forestry and Wildlife, University of Maiduguri, Nigeria between April 2018 and December 2019. Methodology: Ten tree species were used for this study. Each species was replicated 3-times, making a total of 30 stems with their dbh between 10 and 15 cm. A sample billet of 20 cm log was cut from each stem at 10 cm below and above dbh. Each billet was debarked, chipped separately and dried to approximately 12% moisture content. From the chips, 100% wood, 95%W-5%B, 90%W-10%B and 100% bark fuel material samples were created, grinded with mechanical grinder and sieved to approximately 0.4 mm particle size based on ASTM D2013-86. The sieved samples obtained were then analyzed for their percentage moisture content, volatile matter, fixed carbon, ash and gross calorific values using ASTM standard methods. The data obtained were subjected to Analysis of variance from which % variance component and LSD were computed α = 0.05 and 0.01 level of significance. Results: All the measured parameters varied significantly among the tree species and the compositions of the fuel materials obtained from them. Majority of the variation in the fuelwood properties were attributed to the composition of the fuel materials obtained from the trees rather than the species they were made of. On the average, moisture content of the samples ranged from 27.66 to 40.44%, volatile matter (61.38 to 75.11%), ash (0.52 to 2.42%), fixed carbon (24.19 to 36.20%) and gross calorific value (32.99 to 33.02 MJ.kg-1). The moisture and ash contents of the fuel materials obtained from all the tree species increased with the level of bark inclusion whereas, volatile matter content and gross calorific values decreased significantly with level of bark inclusion (P < 0.05). Also, gross calorific value of the fuel materials correlates positively with volatile matter and fixed carbon contents. But, correlate negatively with moisture and ash contents. Among the studied tree species, chips obtained from A. leiocarpus had the highest energy value, followed by C. arereh and B. aegyptiaca while P. reticulatum, A. sieberiana and C. lamprocarpum had the least energy value in that order. Conclusion: Based on their energy value and ash content, minimizing the bark content in wood chips is important from energy and environment point of view. Therefore, chips with 100% wood and those with 5% bark inclusions are recommended for heat generation.

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Variation in fuelwood properties and correlations of fuelwood properties with wood density and growth in five tree and shrub species in Niger

Canadian Journal of Forest Research ◽

10.1139/cjfr-2016-0497 ◽

2017 ◽

Vol 47 (6) ◽

pp. 817-827 ◽

Cited By ~ 2

Author(s):

Carmen Sotelo Montes ◽

John C. Weber ◽

Tougiani Abasse ◽

Dimas A. Silva ◽

Sandra Mayer ◽

...

Keyword(s):

Moisture Content ◽

Wood Density ◽

Ring Width ◽

Calorific Value ◽

Volatile Matter ◽

Annual Rainfall ◽

Fixed Carbon ◽

Gross Calorific Value ◽

Mean Annual Rainfall ◽

Combretum Micranthum

Information about variation and correlations of fuelwood properties and growth is needed in order to recommend species and sites for fuelwood production in a changing climate in Africa. We investigated the effects of site variables (land use, soil, terrain), geographical coordinates, and mean annual rainfall on fuelwood properties (volatile matter, fixed carbon, ash content, moisture content, gross calorific value, gross calorific value per cubic metre, and fuel value index) of Combretum glutinosum Perr., Combretum micranthum G. Don., Combretum nigricans Lepr. ex Guill. & Perr., Guiera senegalensis J.F. Gmel., and Piliostigma reticulatum (DC.) Hochst. and correlations of fuelwood properties with wood density and growth (height, stem diameter, and ring width) in Niger. We hypothesized that wood density, fixed carbon, and gross calorific value were positively correlated with one another and that fixed carbon and gross calorific value were positively correlated with growth. Most effects of site variables, geographical coordinates, and mean annual rainfall on fuelwood properties differed among species. Fuel value index was greater on rocky soils than on sandy soils. Wood moisture content of three species was greater in drier locations than in more humid ones. Correlations of fuelwood properties with wood density and growth differed among species. Based on this and previous research, we recommend parkland agroforests and sites with rocky soils and higher mean annual rainfall for fuelwood production.

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Extractives and energetic properties of wood and charcoal

Revista Árvore ◽

10.1590/s0100-67622014000200018 ◽

2014 ◽

Vol 38 (2) ◽

pp. 369-374 ◽

Cited By ~ 9

Author(s):

Antônio José Vinha Zanuncio ◽

Amélia Guimarães Carvalho ◽

Paulo Fernando Trugilho ◽

Thiago Campos Monteiro

Keyword(s):

Relative Density ◽

Cold Water ◽

Lignin Content ◽

Calorific Value ◽

Volatile Matter ◽

Raw Material ◽

Extractive Content ◽

Charcoal Production ◽

Fixed Carbon ◽

Gross Calorific Value

Charcoal production stands out as a raw material for the production of renewable energy. To assess wood quality in energy terms, studies have focused more on the holocellulose and lignin content than on the role of extractives. The objective of this study was to evaluate the relationship between the extractive content in cold water, in dichloromethane and total on energy properties of wood and charcoal, from six trees species. The extractives were removed with different solvents to be recorded and gross calorific value of wood was determined. The wood was carbonized at 1.67°C/min heating rate until maximum of 450°C and residence time of 30 min. The extractive content was correlated with the gravimetric yield, apparent relative density, ash, volatile matter, fixed carbon and gross calorific value of charcoal. The removal of total extractives and extractives soluble in dichloromethane reduced the gross calorific value of wood of most species evaluated. The extractives removed in cold water did not correlate with the parameters of carbonization. The extractives content in dichloromethane correlated with volatile matter, fixed carbon and gross calorific value. Total extractive content correlated with gravimetric yield, apparent relative density and gross calorific value of charcoal.

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Valorization of briquettes fuel using Pinus spp. sawdust from five regions of Mexico

BioResources ◽

10.15376/biores.16.2.2249-2263 ◽

2021 ◽

Vol 16 (2) ◽

pp. 2249-2263

Author(s):

María Alejandra Ramírez-Ramírez ◽

Artemio Carrillo-Parra ◽

Faustino Ruíz-Aquino ◽

Luis Fernando Pintor-Ibarra ◽

Nicolás González-Ortega ◽

...

Keyword(s):

Compressive Strength ◽

Impact Resistance ◽

Resistance Index ◽

Calorific Value ◽

Volatile Matter ◽

Ash Content ◽

Fixed Carbon ◽

Volumetric Expansion ◽

Pinus Spp ◽

The Impact

This research characterized briquettes made with Pinus spp. sawdust without the use of additives. For this purpose, 19 samples of sawdust from different wood industries located in five states of the Mexican Republic were used. The densification process was carried out in a vertical hydraulic piston laboratory briquette machine. The briquettes were made with 40 g of sawdust, at 50 °C, 20 kPa and pressing for 5 min. The results obtained varied as follows: moisture content (4.1% to 7.2%), density (813.9 to 1,014.4 kg/m3), volumetric expansion (7.4% to 37.3%), compressive strength (4.9 to 40.8 N/mm), impact resistance index (46.7% to 200%), ash (0.1% to 1.1%), volatile matter (82.9% to 90.7%), fixed carbon (8.9% to 16.4%), and calorific value (20.5 to 22.8 MJ/kg). The density of the briquettes was within the “acceptable” classification (800 to 1,200 kg/m3). It was observed that, the higher the density, the lower the volumetric expansion, the higher the compressive strength, and the higher the impact resistance index. According to the ash content, the briquettes could achieve international quality. Due to high volatile matter values, rapid combustion of the briquettes with little generation of toxic smoke would be expected. Fixed carbon and calorific value results were acceptable.

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PERBANDINGAN NILAI BAKAR BRIKET BATUBARA DAN BRIKET ARANG (CAMPURAN CANGKANG BINTARO (Cerbera Manghas) DAN BAMBU BETUNG (Dendrocalamus Asper)

TEKNIKA: Jurnal Teknik ◽

10.35449/teknika.v6i1.99 ◽

2019 ◽

Vol 6 (1) ◽

pp. 1

Author(s):

Ida Febriana ◽

Zurohaina Zurohaina ◽

Sahrul Effendy

Keyword(s):

Alternative Energy ◽

Bituminous Coal ◽

Raw Materials ◽

Calorific Value ◽

Volatile Matter ◽

Carbonization Temperature ◽

Fixed Carbon ◽

Alternative Energy Source ◽

Tapioca Flour ◽

Cerbera Manghas

Charcoal briquettes are smokeless fuels which are a type of solid fuel whose fly substance is made low enough so that the smoke generated on its utilization will not interfere with health. In this study charcoal briquettes were made from bintaro shell waste and betung bamboo using tapioca flour adhesives. This study aims to obtain the best quality sub-bituminous coal briquettes and coal briquettes. In this study the carbonization temperature used was 400ᵒC and the composition of raw materials for bintaro shells and betung bamboo was 50:50, the composition of raw materials for sub-bituminous coal and straw 90:10. The method used in this research is experiment or experimental method, with fuel value collection using ASTM D5865-03 standard. The results obtained from this study are for charcoal briquettes with 4000C carbonization temperature Inherent Moisture value of 1.91%, ash 2.29%, volatile matter 23.79%, fixed carbon 72.01% and calorific value 5878.7 kal / gr, and for coal briquettes obtained value Inherent Moisture 0.52%, ash 4.42%, volatile matter 17.98%, fixed carbon 77.08% and calorific value 7152.6 kal / gr. The fuel value of coal briquettes is greater than that of charcoal briquettes, but the combustion value of charcoal briquettes includes a good calorific value as an alternative energy source, and is in accordance with the SNI standard of 5000 kal / gr, even close to the Japanese standard 6000 cal / gr. Keywords: Bintaro, briquette, calorific value

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Energetic potential of bamboo culms for industrial and domestic use in Southern Brazil

Ciência Rural ◽

10.1590/0103-8478cr20160233 ◽

2016 ◽

Vol 46 (11) ◽

pp. 1963-1968 ◽

Cited By ~ 4

Author(s):

Ailton Leonel Balduino Junior ◽

Thalles Yurgen Balduino ◽

Gustavo Friederichs ◽

Alexsandro Bayestorff da Cunha ◽

Martha Andreia Brand

Keyword(s):

Chemical Composition ◽

Carbon Content ◽

Calorific Value ◽

Energy Generation ◽

Extractive Content ◽

Fixed Carbon ◽

Gross Calorific Value ◽

Bambusa Vulgaris ◽

Domestic Use ◽

Fixed Carbon Content

ABSTRACT: This study aimed to determine the energetic quality of the Bambusa vulgaris culms for combustion (in natura) and as a charcoal. Five individuals (culms) of Bambusa vulgaris of 3 years of age were analyzed, gathered in the city of Florianópolis, Santa Catarina. In the in natura culms it was determined the moisture content freshly gathered (39%); basic density (0.624gcm-3); the chemical composition (total extractive content (16.26%) and lignin content (25.76%)); the proximate chemical composition (volatiles content (82.25%); fixed carbon content (15.26%) and ash (2.49%)) and gross calorific value (4571kcalkg-1). In the charcoal, produced in the laboratory, the determined properties were the gravimetric yield (36.40%);the apparent density (0.372gcm-3); volatiles content (27.55%); fixed carbon content (67.32%); ash (5.12%) and gross calorific value (7431kcalkg-1). The Bambusa vulgaris species has potential for use in the energy generation either in natura, as chips for burning in boilers or in the charcoal form for domestic use, it can be used to broaden the base of biomass for energy generation and to replace the timber species of Pinus and Eucalyptus gender used for this purpose in the Southern region of Brazil.

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ANALISIS KUALITAS PEMBAKARAN BRIKET BATUBARA DENGAN METODE KARBONISASI BERDASARKAN PARAMETER KUALITAS BRIKET, UKURAN PARTIKEL DAN KOMPOSISI

Jurnal GEOSAPTA ◽

10.20527/jg.v4i01.4433 ◽

2018 ◽

Vol 4 (01) ◽

Author(s):

Didi Kasi Setiawan ◽

Agus Triantoro ◽

Annisa Annisa

Keyword(s):

Calorific Value ◽

Volatile Matter ◽

Ash Content ◽

Fixed Carbon ◽

American Society

Briket batubara merupakan bahan bakar padat yang mempunyai kelayakan teknis dan ketersedian batubara cukup banyak di Indonesia. Permasalahan yang sering di jumpai dalam penggunaan briket batubara sebagai bahan bakar energi adalah lamanya penyalaan, aroma yang tidak sedap pada saat dibakar, dan daya rekat briket yang tidak bagus sehingga briket mudah pecah. Untuk mengatasi masalah tersebut perlu mengetahui pengaruh komposisi dan ukuran partikel briket batubara terhadap kualitas pembakaran serta kualitas briket batubara. Dalam hal ini, diperlukan analisis laboratorium yang hasilnya dapat digunakan untuk mengklasifikasikan tingkatan kualitas briket batubara.Metode analisis yang digunakan untuk kualitas briket yaitu American Society for Testing and Materials (ASTM) meliputi pengujian moisture, ash content, volatile matter, calorific value, fixed carbon dan karbonisasi untuk peningkatan kualitas, meliputi moisture, volatile matter serta calorific value. Berdasarkan hasil pengujian yang telah dilakukan dapat disimpulkan bahwa proses karbonisasi batubara dapat menurunkan kandungan kualitas batubara inherent moisture adb (17,1 % - 6,38%) dan meningkatkan nilai calorific value cal/g adb (5462 - 6261), waktu nyala api (0:23:14 – 0:47:06), waktu nyala bara (0:44:56 – 1:23:10) serta durasi pembakaran (1:08:10 – 2:10:16). Kata-kata kunci: Briket, Batubara, Karbonisasi, Kualitas Batubara.

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PENGARUH SUHU DAN KONSENTRASI PEREKAT TERHADAP KARAKTERISTIK BRIKET BIOARANG BERBAHAN BAKU TANDAN KOSONG KELAPA SAWIT DENGAN PROSES PIROLISIS

Konversi ◽

10.20527/k.v4i2.266 ◽

2015 ◽

Vol 4 (2) ◽

pp. 16

Author(s):

Yuli Ristianingsih ◽

Ayuning Ulfa ◽

Rachmi Syafitri K.S

Keyword(s):

Solid Waste ◽

Palm Oil ◽

Calorific Value ◽

Volatile Matter ◽

Ash Content ◽

Crude Palm Oil ◽

Fixed Carbon ◽

Heating Value ◽

Empty Fruit Bunches ◽

Rate Of Combustion

Abstrak-Tandan Kosong Kelapa Sawit merupakan limbah padat hasil produksi Crude Palm Oil (CPO). Setiap 1(satu) ton tandan buah segar dihasilkan 23% limbah padat. Limbah padat ini dapat di konversi menjadi bahan bakar pengganti minyak yaitu briket. Briket bioarang adalah bahan bakar padat yang dapat digunakan sebagai bahan bakar alternatif pengganti bahan bakar yang berasal dari fosil seperti minyak dan gas. Penelitian ini bertujuan untuk mengetahui pengaruh suhu pirolisis terhadap yield bioarang yang dihasilkan dan mengetahui pengaruh konsentrasi perekat kanji (5% w/w, 10% w/w, 15% w/w) terhadap karakteristik briket hasil penelitian (kadar air, volatile matter, kadar abu, fixed carbon, nilai kalor dan laju pembakaran). Penelitian dilakukan dengan metode pirolisis yaitu proses pembakaran bahan baku dalam reaktor pirolisis dengan menggunakan suhu yang tinggi dan tanpa atau dengan sedikit oksigen. Pirolisis dilakukan selama 2,5 jam dengan variasi suhu yaitu 350°C, 400°C, 450°C dan 500°C. Arang yang dihasilkan dicampur dengan perekat sesuai variasi dan dicetak menjadi briket. Briket kemudian dianalisa kadar air, kadar abu, kadar karbon, kadar zat terbang, nilai kalor dan laju pembakaran. Briket dengan yield tertinggi terdapat pada suhu 350°C sebesar 51,53% dan yield terendah pada suhu 500°C sebesar 26,03%. Briket hasil penelitian ini telah memenuhi standar mutu briket sebagai bahan bakar dilihat dari nilai kalor. Komposisi optimal antara perekat kanji dan arang TKKS hasil pirolisis yaitu pada 5%:95% yang menghasilkan nilai kalor terbesar yaitu 6748,15kal/g. Kata kunci : Briket Bioarang, Pirolisis, Tandan Kosong Kelapa Sawit Abstract-Palm Oil Empty Fruit Bunches are solid waste from Crude Palm Oil (CPO industry). For 1 ton of fresh fruit bunches produced 23% of solid waste. This solid waste can be converted into alternative energy that called briquettes. Briquettes are solid fuel that can be used as an alternative fuel replacement for fossil fuels such as oil and gas. This study aims to determine the effect of temperature on the yield generated briquettes and the effect of stach adhesive concentration (5, 10 and 15% wt) to briquettes characteristics (moisture content, volatile matter, ash content, fixed carbon, calorific value and the rate of combustion). In this reseacrh, two kilograms of palm oil empty fruit bunches was burned using pyrolisis reactor at different temperatur (350, 400, 450 and 5000C) for 2.5 hour. Charcoal produced was mixed with an adhesive in accordance variations and molded into briquettes. Briquettes then analyzed the water content, ash content, carbon content, volatile matter content, heating value and rate of combustion. The maximum yield of briquettes which was obtained in this research is 51.53% at temperature 3500C and the lowest yield at temperature of 500 ° C by 26.03%. Briquettes results of this study have met the quality standards of fuel briquettes as seen from the heating value. Optimal adhesive composition between starch and charcoal TKKS is 5%: 95% that generates highest calorific value about 6748.15kal/ g. Keywords: Briquette Bioarang, Pyrolysis, oil palm empty bunches

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GROWTH AND ENERGY QUALITY OF EUCALYPTUS WOOD IN DIFFERENT CROP-LIVESTOCK-FOREST SPATIAL ARRANGEMENTS

FLORESTA ◽

10.5380/rf.v50i4.59650 ◽

2020 ◽

Vol 50 (4) ◽

pp. 1707

Author(s):

Helio Tonini ◽

Marina Moura Morales ◽

Flavio Jesus Wruck ◽

Ronaldo Maran Deliberali

Keyword(s):

Genetic Material ◽

Volume Growth ◽

Basic Density ◽

Calorific Value ◽

Volatile Matter ◽

Ash Content ◽

High Yield ◽

Fixed Carbon ◽

Cropland Area ◽

Eucalyptus Wood

The aim of the present study was to assess the growth and energetic properties of genetic material of eucalyptus grown in several integrated crop-livestock system spatial arrangements in Barra-do-Garças City (MT). The genetic material of 76-month old Eucalyptus spp from eight spatial arrangements were assessed according to the following properties: diameter, height and volume growth, mortality rate, dry matter yield, sapwood to heartwood ratio, form factor, bark volume, basic density, superior calorific value, ash content, volatile matter, fixed carbon and trunk energy. Data analysis was performed by adjusting growth function, test for model identity and parameters equality and ANOVA tests to Scott-Knott’s mean clustering test. Eucalyptus grandis x E. urophylla clones from recorded the highest energy efficiency due to their high yield volume, which was decisive to determine estimated energy available per tree and cropland area. Growth, stem shape and basic density varied among, and within, the same genetic materials, depending on their respective spatial arrangement. However, solid biomass properties (high calorific value, ash content, fixed carbon and volatile matter) remained stable.

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