scholarly journals ANALISIS PENGARUH CURAH HUJAN TERHADAP PARAMETER KUALITAS BATUBARA PADA SEAM 12 MAWAR DI STOCK ROM MALINTUT PT MULTI TAMBANGJAYA UTAMA

2021 ◽  
Vol 6 (1) ◽  
pp. 47
Author(s):  
Winda Winda ◽  
Agus Triantoro ◽  
Annisa Annisa
Keyword(s):  
Volatile Matter ◽  
Ash Content ◽  
Total Sulfur ◽  
Pyritic Sulfur

Permasalahan yang timbul dari parameter kualitas batubara ini adalah hujan yang sering melanda pit atau stock ROM mengakibatkan kualitas batubara tidak stabil sehingga perlu diadakannya penanganan kualitas batubara. Lokasi kegiatan di PT Multi Tambangjaya Utama di Kabupaten Barito Selatan, Provinsi Kaliantan Selatan.Pada penelitian ini, melakukan sampling sebelum hujan dan ± 12 jam setelah hujan dan menganalisis sampel batubara dilaboratorium data – data yang didapat adalah nilai total moisture, inherent moisture, ash content, volatile matter, total sulfur, calori value, serta menganalisa faktor – faktor yang mempengaruhi pengurangan parameter kualitas batubara setelah hujan.Data hasil parameter kualitas batubara yang dianalisis adalah sebelum hujan: 1007 %TM 8.57 (ar), %IM 3.94 (adb), %ASH 5.45 (adb), %VM 45.35 (adb), %FC 45.26 (adb), %TS 3.23 (adb), CV 6913 kcal/kg (ar).Data hasil parameter kualitas batubara setelah hujan adalah : 1507 %TM 7.02 (ar) karena cuaca panas dan sampel dalam keadaan kering, 2208 %TM 10.81 (ar) karena cuaca gerimis selama 75 menit dan sampel dalam keadaan lembab, 2907 %IM 4.47 (adb), 3207 %IM 3.66 (adb) karena proses equilibrium (pengoksidian sampel pada suhu dan kelembaban ruang uji) di laboratorium yang kurang stabil, 2907 %ASH 6.87 (adb), 2208 %ASH 3.92 (adb) karena proses pencucian secara alami yang disebabkan oleh hujan, 2707 %VM 42.83 (adb), 2208 %VM 45.60 (adb) karena karena total moisture naik, 2907 %TS 3.79 (adb), 2108 %TS 2.96 (adb), karena  pencucian alami yang disebabkan oleh hujan sulfur yang dimaksud pyritic sulfur, 1507 CV 7096 kcal/kg (ar), 2208 CV 6702 kcal/kg (ar) karena semakin tinggi moisture dan abu, semakin kecil nilai kalorinya. Kata kunci: kualitas batubara, pengaruh hujan, stock ROM

STUDI PENGARUH PENGGUNAAN CAIRAN SURFAKTAN WETTING AGENT PADA PROSES BARGING BATUBARA

2018 ◽  
Vol 4 (01) ◽  
Author(s):  
I Wayan Murdiana ◽  
Agus Triantoro ◽  
Adip Mustofa
Keyword(s):  
Calorific Value ◽  
Volatile Matter ◽  
Ash Content ◽  
Wetting Agent ◽  
Total Sulfur ◽  
Fixed Carbon

Di Indonesia, kususnya di wilayah Kalimantan selatan merupakan salah satu wilayah yang memiliki banyak sumberdaya batubara. Batubara adalah salah satu energy alternative di Indonesia yang cukup besar cadangannya. Dalam pemanfaatannya, batubara harus diketahui terlebih dahulu kualitasnya, kualitas batubara merupakan faktor dalam pengambilan keputusan oleh pihak konsumen untuk memilih produk yang dihasilkan oleh produsen. Untuk dapat mengetahui serta memperoleh data kualitas batubara yang dihasilkan selama proses produksi perlu dilakukan kegiatan pengukuran kualitas batubara antara lain total sulfur (TS), ash content (AC), volatile matter (VM), inherent moisture (IM), fixed carbon (FC), calorific value (CV), dan total moisture (TM).Metode analisa yang digunakan untuk kualitas batubara adalah America Society for Testing (ASTM) meliputi pengujian, menghitung Total Moisture (TM) batubara yang sebelum dan setelah disemprot dengan cairan surfaktan wetting agent dan menghitung ash Sampel batubara sebelum dan setelah disemprot dengan cairan surfaktan wetting agent.Berdasarkan hasil pengujian yang telah dilakukan bahwa rata-rata TM batubara sebelum disemprot dengan cairan surfaktan wetting agent adalah 37,762% dan TM batubara setelah disemprot engan cairan surfaktan wetting agent adalah 36,105%. Sedangkan rata-rata nilai ash batubara sebelum disemprot dengan cairan surfaktan wetting agent adalah 5,78% dan nilai ash setelah disemprot dengan cairan surfaktan wetting agent adalah 5,58%. Kata-kata kunci: Batubara, Surfaktan Wetting agent.

Evaluation of the higher heating value, volatile matter, fixed carbon and ash content of ground bamboo using near infrared spectroscopy

2017 ◽  
Vol 25 (5) ◽  
pp. 301-310 ◽  
Author(s):  
Jetsada Posom ◽  
Panmanas Sirisomboon
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Model Development ◽  
Volatile Matter ◽  
Ash Content ◽  
Least Squares Regression ◽  
Fixed Carbon ◽  
Bomb Calorimetry ◽  
Heating Value

This research aimed to determine the higher heating value, volatile matter, fixed carbon and ash content of ground bamboo using Fourier transform near infrared spectroscopy as an alternative to bomb calorimetry and thermogravimetry. Bamboo culms used in this study had circumferences ranging from 16 to 40 cm. Model development was performed using partial least squares regression. The higher heating value, volatile matter, fixed carbon and ash content were predicted with coefficients of determination (r2) of 0.92, 0.82, 0.85 and 0.51; root mean square error of prediction (RMSEP) of 122 J g−1, 1.15%, 1.00% and 0.77%; ratio of the standard deviation to standard error of validation (RPD) of 3.66, 2.55, 2.62 and 1.44; and bias of 14.4 J g−1, −0.43%, 0.03% and −0.11%, respectively. This report shows that near infrared spectroscopy is quite successful in predicting the higher heating value, and is usable with screening for the determination of fixed carbon and volatile matter. For ash content, the method is not recommended. The models should be able to predict the properties of bamboo samples which are suitable for achieving higher efficiency for the biomass conversion process.

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

BioResources ◽  
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.

scholarly journals Analysis of the Quality of Mixed Coconut Shell Waste Briquettes with Various Biomass Additives as Alternative Fuels

2021 ◽  
Vol 4 (2) ◽  
Author(s):  
Yusraida Khairani Dalimunthe ◽  
Sugiatmo Kasmungin ◽  
Listiana Satiawati ◽  
Thariq Madani ◽  
Teuku Ananda Rizky
Keyword(s):  
Moisture Content ◽  
Calorific Value ◽  
Volatile Matter ◽  
Matter Content ◽  
Ash Content ◽  
Coconut Shell ◽  
Bamboo Charcoal ◽  
A Value ◽  
Shell Waste

The purpose of this study was to see the best quality of briquettes from the main ingredient of coconut shell waste<br />with various biomass additives to see the calorific value, moisture content, ash content, and volatile matter<br />content of the biomass mixture. Furthermore, further research will be carried out specifically to see the quality of<br />briquettes from a mixture of coconut shell waste and sawdust. The method used in this research is to conduct a<br />literature study of various literature related to briquettes from coconut shell waste mixed with various additives<br />specifically and then look at the best quality briquettes produced from these various pieces of literature. As for<br />what is determined as the control variable of this study is coconut shell waste and as an independent variable,<br />namely coffee skin waste, rice husks, water hyacinth, Bintaro fruit, segon wood sawdust, coconut husk, durian<br />skin, bamboo charcoal, areca nut skin, and leather waste. sago with a certain composition. Furthermore, this<br />paper also describes the stages of making briquettes from coconut shell waste and sawdust for further testing of<br />the calorific value, moisture content, ash content, volatile matter content on a laboratory scale for further<br />research. From various literatures, it was found that the highest calorific value was obtained from a mixture of<br />coconut shell waste and bamboo charcoal with a value of 7110.7288 cal / gr and the lowest calorific value was<br />obtained from a mixture of coconut shell waste and sago shell waste with a value of 114 cal / gr, then for the value<br />The highest water content was obtained from a mixture of coconut shell waste and rice husk with a value of<br />37.70% and the lowest water content value was obtained from a mixture of coconut shell waste 3.80%, then for the<br />highest ash content value was obtained from a mixture of coconut shell waste and coffee skin with a value of<br />20.862% and for the lowest ash content value obtained from a mixture of coconut shell and Bintaro fruit waste,<br />namely 2%, and for the highest volatile matter content value obtained from a mixture of coconut shell and coconut<br />husk waste with a value of 33.45% and for the value of volatile matter levels The lowest was obtained from a<br />mixture of coconut shell waste and sago skin waste with a value of 33 , 45%.

scholarly journals Evaluation the energy production potential of aggressively invasive Prosopis juliflora Sw (Fabacea): An emerging threat in the Bundala Ramsar Wetland

2020 ◽  
Author(s):  
W.A.R.T.W. Bandara ◽  
Oshadi Ruwanthika Ranasinghe ◽  
Richard Vlosky
Keyword(s):  
Sri Lanka ◽  
Invasive Plant ◽  
Calorific Value ◽  
Volatile Matter ◽  
Prosopis Juliflora ◽  
Ash Content ◽  
Biomass Ash ◽  
Significant Difference ◽  
Ramsar Wetland ◽  
Level Of Significance

Abstract Prosopis juliflora is an invasive plant species rapidly expanding in the Asian and African continents. Invasion of P. juliflora in Bundala Ramsar Wetland (BRW) in Sri Lanka has created a number of biodiversity and conservation issues. This study was conducted to assess the possibility to utilize this invasive plant as a fuel source for local industries. The moisture content, wood density, ash content, volatile matter, fixed carbon content, biomass/ash ration and calorific value of P. juliflora were measured and compared with Leucaena leucocephala, which is a widely used fuelwood source in Sri Lanka and elsewhere. P. juliflora, performed better than L. leucocephala for most of these parameters. Ash content was comparatively higher in P. juliflora than that of L. leucocephala; however, biomass to ash ratio of P. juliflora was significantly lower (at 0.05 level of significance) than that of L. leucocephala, suggesting its suitability as a fuelwood source. Further, the Fuel Value Index (FVI) of P. juliflora (3,276) was slightly lower than that of L. leucocephala (3,336), a non-significant difference. P. juliflora and L. leucocephala reached Fiber Saturation Point values within drying periods of 24 and 27 days, respectively. According to our estimates of energy properties, 1 Kg of P. juliflora could be used to substitute 0.5 L of diesel and furnace oil as well as 5 kWh (5 units) of electricity. As such, we recommend harvesting P. juliflora from BRW as a potential fuelwood energy source for local industries.

scholarly journals Analysis of the efficiency of a solid fuel boiler depending on the choice of combusted fuel

2020 ◽  
Vol 154 ◽  
pp. 02003
Author(s):  
Grzegorz Pełka ◽  
Wojciech Luboń ◽  
Przemysław Pachytel
Keyword(s):  
Energy Efficiency ◽  
Solid Fuel ◽  
Combustion Process ◽  
Calorific Value ◽  
Volatile Matter ◽  
Ash Content ◽  
Solid Fuels ◽  
The Real ◽  
Residential Sector

In the municipal and residential sector in Poland, as many as 50% of households are heated by solid fuel boilers. Most often these are, unfortunately, inefficient boilers, fired with low-quality coal. This study characterizes the market of boilers for solid fuels in Poland, and also presents the main apportionment of these devices, due to the different criteria that characterize them. The current legal changes in the scope of energy and emission requirements for solid fuel boilers are also discussed. The main purpose of this work is to analyze the real efficiency of the solid fuel over-fired boiler used, depending on the fuel burned in it. The process of burning selected fuels (seasoned wood, coal and pea coal) in the boiler was preceded by tests of these fuels to determine their energy parameters, such as moisture, ash content, the share of volatile matter and calorific value. In the next step, the energy efficiency obtained by the tested solid fuel boiler during the combustion of selected solid fuels was compared. The highest efficiency was achieved during the combustion of pea coal, and the lowest was achieved during the combustion of wood. In any case, the nominal efficiency value was achieved. Solutions that could improve the quality of the combustion process in this type of boiler were proposed.

Analisis Proximate Briket Tempurung Kelapa dan Ampas Tebu

2019 ◽  
Vol 16 (2) ◽  
pp. 91
Author(s):  
Vivin Setiani ◽  
Adhi Setiawan ◽  
Mey Rohma Dhani ◽  
Risya Dwi Maulidya
Keyword(s):  
Energy Source ◽  
Fossil Fuels ◽  
Quality Standards ◽  
Volatile Matter ◽  
Ash Content ◽  
Coconut Shell ◽  
Mass Ratio ◽  
Biomass Waste ◽  
Quality Value ◽  
Coconut Shells

Fossil fuels are a non-renewable energy source and their existence will be depleted. An alternative is needed that can reduce fossil fuels by using biomass. Biomass waste in the form of bagasse and coconut shell can be used as an alternative fuel in the form of biobriquette. This study aims to analyze the quality value of briquettes from the proximate test of the composition of bagasse and coconut shell produced with briquette quality standards that refer to SNI 01-6235-2000 about wood charcoal briquettes. The variables in this study consisted of five variables. The variables in this study were mass ratio coconut shells to bagasse were 90%: 10%, 80%: 20%, 70%; 30%, 60%: 40% and 50%: 50% respectively. The results of the test of water content, ash content, and volatile matter of the best quality briquettes of five variables were 90% coconut shell and 10% bagasse.

scholarly journals Hydrothermal Carbonization as a Strategy for Sewage Sludge Management: Influence of Process Withdrawal Point on Hydrochar Properties

Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2890 ◽  
Author(s):  
Fabio Merzari ◽  
Jillian Goldfarb ◽  
Gianni Andreottola ◽  
Tanja Mimmo ◽  
Maurizio Volpe ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Oxygen Demand ◽  
Hydrothermal Carbonization ◽  
Volatile Matter ◽  
Ash Content ◽  
Process Conditions ◽  
Conventional Activated Sludge ◽  
Phosphorous Content ◽  
Sewage Sludge Management ◽  
Ph Decrease

Conventional activated sludge systems, still widely used to treat wastewater, produce large amounts of solid waste that is commonly landfilled or incinerated. This study addresses the potential use of Hydrothermal Carbonization (HTC) to valorize sewage sludge residues examining the properties of hydrochars depending on HTC process conditions and sewage sludge withdrawal point. With increasing HTC severity (process residence time and temperature), solid yield, total Chemical Oxygen Demand (COD) and solid pH decrease while ash content increases. Hydrochars produced from primary (thickened) and secondary (digested and dewatered) sludge show peculiar distinct properties. Hydrochars produced from thickened sludge show good fuel properties in terms of Higher Heating Value (HHV) and reduced ash content. However, relatively high volatile matter and O:C and H:C ratios result in thermal reactivity significantly higher than typical coals. Both series of carbonized secondary sludges show neutral pH, low COD, enhanced phosphorous content and low heavy metals concentration: as a whole, they show properties compatible with their use as soil amendments.

Estimation of Calorific Values of Some of the Turkish Lignites by Artificial Neural Network and Multiple Regressions

2020 ◽  
Vol 10 (2) ◽  
pp. 154-162
Author(s):  
Engin Özdemir ◽  
Didem Eren Sarici
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Multiple Regression ◽  
Regression Models ◽  
Calorific Value ◽  
Volatile Matter ◽  
Ash Content ◽  
Percentage Error ◽  
Multiple Regression Models ◽  
Artificial Neural

Background: The calorific value is the most important and effective factors of lignites in terms of energy resources. Humidity, ash content, volatile matter and sulfur content are the main factors affecting lignite's calorific values. Objective: Determination of calorific value is a process that takes time and cost for businesses. Therefore, estimating the calorific value from the developed models by using other parameters will benefit enterprises in term of time, cost and labor. Method: In this study calorific values were estimated by using artificial neural network and multiple regression models by using lignite data of 30 different regions. As input parameters, humidity, ash content and volatile matter values are used. In addition, the mean absolute percentage error and the significance coefficient values were determined. Results: Mean absolute percentage error values were found to be below 10%. There is a strong relationship between calorific values and other properties (R2> 90). Conclusion: As a result, artificial neural network and multiple regression models proposed in this study was shown to successfully estimate the calorific value of lignites without performing laboratory analyses.

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

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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