Characterization of carbonized municipal waste as substitute for coal fuel

Matsuzawa, Yoshiaki; Mae, Kazuhiro; Hasegawa, Isao; Suzuki, Kohei; Fujiyoshi, Hironobu; Ito, Masaaki; Ayabe, Muneo

doi:10.1016/j.fuel.2006.06.008

Cited by 10 publications

(5 citation statements)

References 7 publications

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“…Penggunaan briket sebagai bahan bakar sangat menguntungkan, terutama pada saat ini sedang terjadi krisis bahan bakar. Menurut Matsuzawa, dkk (2007) arang dapat dimanfaatkan sebagai sumber energi bakar [13]. Arang juga dapat dimanfaatkan sebagai pembangun kesuburan tanah [6].…”

Section: Teoriunclassified

Penentuan Kondisi Optimum Suhu Dan Waktu Karbonisasi Pada Pembuatan Arang Dari Sekam Padi

2013

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Charcoal is a solid porous material containing 80 - 90 % of carbon being produced from combustion at high temperatures (carbonization ), that the material only carbonized and not oxidized become carbon dioxide. The research is aimed to know the optimum conditions on the process of carbonization from the rice husks. The carbonization process conducted in temperatures 400 oC, 500 oC, and 600 oC with variations in time 30 minutes, 60 minutes, 90 minutes and 120 minutes. Optimum conditions carbonization for rice husk at temperature 400 oC for 120 minutes with a carbon content 41,3 %, moisture content 6,1 %, ash content 32,6 % and volatile matter content 20,5 %.

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Section: Teoriunclassified

Penentuan Kondisi Optimum Suhu Dan Waktu Karbonisasi Pada Pembuatan Arang Dari Sekam Padi

2013

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“…In recent years, many more investigations on the coal burning process and catalytic combustion were performed successively to promote combustion efficiency and meet pollution emission requirements. The ignition temperature and activation energy of fly ash coal due to the incorporation of alkali metal salt decrease. − The catalytic effect of coal-burning additives can increase the combustion rate and decrease the activation energy of coal. − The action of catalysts on fuel ignition can be explained by the enhancement of volatiles emissions. It can be assumed that alkali causes weakening of the intermolecular interaction of the polymeric chains and, at the same time, catalyzes not only intralink dehydration but promotes the processes of retro-aldol cleavage and condensation of the products produced …”

Section: Introductionmentioning

confidence: 99%

Catalytic Effect of Metallic Oxides on Combustion Behavior of High Ash Coal

et al. 2007

Energy Fuels

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By means of thermogravimetric analysis, the catalytic effect of metallic oxides (CuO, Fe2O3, and ZnO) on the combustion behavior of high-ash coal was investigated under nonisothermal conditions. Experiments were conducted from ambient temperature to 1000 °C at a heating rate of 20 °C·min-1. The ignition temperature, burnout performance, and exothermic behavior were used to evaluate the catalytic effect. Moreover, the kinetics parameters (activation energy and pre-exponential factor) were determined using the Coats−Redfern method. It is indicated that, compared with the combustion characteristics of high-ash coal, the ignition temperature of the samples with metallic oxides decreases by 8−50 °C. Metallic oxides can speed up the combustion rate and burnout of the fixed carbon. The exothermic values of samples incorporating metallic oxides increase by 15−30%, which may be due to the catalytic effect of metallic oxides on fixed carbon combustion. The activation energies of the samples decrease, and there is a linear connection between the activation energies and pre-exponential factors (ln A = 0.2683 × E-12.807).

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“…A number of researchers have proven that the using of alkaline and alkaline-earth metals as combustion activators results in the acceleration of volatiles release along with the decrease in ignition temperature of the coals (Hedden and Wilhelm 1980;Altun et al 2001;Matsuzawa et al 2007). Intensification of carbon matrix thermal decomposition followed by oxidation of condensed products is observed in the presence of additives (Rustamov et al 1998).…”

Section: Introductionmentioning

confidence: 99%

Non-isothermal oxidation of coal with Ce(NO3)3 and Cu(NO3)2 additives

Ларионов

Gromov

2019

Int J Coal Sci Technol

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Non-isothermal oxidation of brown coal with 5 wt% of Cu(NO 3) 2 , 5 wt% of Ce(NO 3) 3 and {2.5 wt% Cu(NO 3) 2 ? 2.5 wt% Ce(NO 3) 3 } additives was studied. The introduction of additives was carried out by an incipient wet impregnation method to ensure uniform distribution of cerium and copper nitrates within the structure of coal powdery samples (according to SEM and EDX mapping). The samples reactivity was studied in an isothermal oxidation regime at 200°C (1 h) and by DSC/TGA at 2.5°C/min heating rate. The additives implementation was found to reduce significantly the oxidation onset temperature (DT i = 20-55°C), the samples oxidation delay time (Dt i = 2-22 min) and overall duration of the oxidation process (Dt c = 8-16 min). The additives efficiency could be graded in accordance with the activation on the coal oxidation in the following row: Cu(NO 3) 2 [ {Cu(NO 3) 2 ? Ce(NO 3) 3 } [ Ce(NO 3) 3. According to the mass spectroscopy, the obtained row of activation correlates well with the initial temperature of the studied nitrate's decomposition (from 190 to 223°C). A presence of nitrates was found to change significantly the trend of heat release taking place during the oxidation of coal samples (according to DSC/TGA data). The influence of coal morphology and volatiles content in initial sample on the parameters of the oxidation process was studied as well. Activation energy (E a) of the coal oxidation was calculated using Coats-Redfern method. Maximum decrease in E a from 69 to 58 kJ/mol was observed for the samples with Cu(NO 3) 2 .

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Characterization of carbonized municipal waste as substitute for coal fuel

Cited by 10 publications

References 7 publications

Penentuan Kondisi Optimum Suhu Dan Waktu Karbonisasi Pada Pembuatan Arang Dari Sekam Padi

Penentuan Kondisi Optimum Suhu Dan Waktu Karbonisasi Pada Pembuatan Arang Dari Sekam Padi

Catalytic Effect of Metallic Oxides on Combustion Behavior of High Ash Coal

Non-isothermal oxidation of coal with Ce(NO3)3 and Cu(NO3)2 additives

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