Fundamental Study on the Carbonization Characteristics of Low Rank Coal Under Low Temperature and its Application on Traditional Blacksmith

2012 ◽  
Vol 576 ◽  
pp. 615-618 ◽  
Author(s):  
Khairil ◽  
Irwansyah Irwansyah ◽  
Hamdani Sarwo Edhy ◽  
Samsul Rizal
Keyword(s):  
Low Temperature ◽  
Carbon Content ◽  
Carbonization Temperature ◽  
Low Rank ◽  
Experimental Result ◽  
Gas Composition ◽  
Low Rank Coal ◽  
Fixed Carbon ◽  
Fundamental Study ◽  
Fixed Carbon Content

The fundamental study on carbonization characteristic of low rank coal under low temperature was investigated by using a laboratorium scale electric furnace. In this experiment, the mass decreasing fraction of coal during carbonization, the bahaviour of volatile matter and the changes of fixed carbon as well as gas composition during carbonization was carried out. The effect of fixed carbon content in fuel on iron quality is also investigated. The experimental method for investigation of low rank coal carbonization characteristic was selected by variation of the carbonization temperature and nitrogen was introduced as a carrier gas. The experimental result shows that the mass decreasing fraction of coke was increased with the carbonization period. The fixed carbon content in coke was increased with the carbonization temperature. The gas composition during carbonisation shows consist of argon (Ar), carbon monoxide (CO) and methane (CH4). It shows that the CO gas is dominated of the amoung them. It is shown that the iron surface hardness may affect on carburizing media.

Experimental Study on Low-Temperature Carbonization of Low Rank Coal

2013 ◽  
Vol 805-806 ◽  
pp. 1311-1316
Author(s):  
Li Qun Wang ◽  
Zhong Xiang Wei ◽  
Zhong Bo Yi
Keyword(s):  
Experimental Study ◽  
Ash Content ◽  
Carbonization Temperature ◽  
Holding Time ◽  
Low Rank ◽  
Volatile Content ◽  
Low Rank Coal ◽  
Fixed Carbon ◽  
Dry Distillation ◽  
Increasing Trend

In this paper,a research was carried out on the regularities of carbonization temperature,holding time and mass on weightlessness of low rank coal. The experiment showed experiments in a certern range (450°C~700°C,<60min),weightlessness of coal in an increasing trend,the remained volatile content of semi-coke was measured reduce tending to value,ash content increased,fixed carbon gradually increased in the temperature range with the improvement of the carbonization temperature and holding time,also hydrogen and oxygen content of the char decreased,a significant increased in the carbon content,nitrogen and sulfur content was essentially the same. Reactivity of CO2 and semi-coke obtained in different carbonization conditions were better,the response rates are 100% when the temperature exceeded 1000°C. Best condition of dry distillation: carbonization temperature was 500°C~650°C,mass of low rank coal was less than 30g,holding time was between 30 minutes to 40 minutes.

Research on Purification Technology of Ultra-Large Flake Graphite Based on Alkali-Acid Method

2021 ◽  
Vol 1036 ◽  
pp. 104-113
Author(s):  
Hong Fei Guo ◽  
Bao Chao ◽  
Zeng Qi Zhao ◽  
Ding Nan
Keyword(s):  
Carbon Content ◽  
High Purity ◽  
Raw Materials ◽  
Acid Leaching ◽  
Flake Graphite ◽  
Fixed Carbon ◽  
Fusion Temperature ◽  
Acid Method ◽  
Fixed Carbon Content ◽  
Flake Structure

Graphite is a strategically scarce resource, and the preparation of high-purity graphite is the prerequisite and basis for the application of graphite. In order to determine the optimal purification technology parameters of an ultra-large flake graphite mine pneumatic separation ore with a fixed carbon content of 77.69%, a particle size of mainly 10 to 40 mesh, and main impurities of calcium carbonate, iron oxide and silica , two additional experiments of acid method and alkali method were added on the basis of alkali-acid method, to investigate the purification effect of different technological processes and acid leaching times on graphite raw materials, as well as to analyze the retention extent of different methods and alkali fusion temperature on graphite ultra-large flake structure. The results show that all three methods can increase the fixed carbon content of graphite to above 99%. However, compared with the acid method and the alkali method, the alkali-acid method can obtain high-purity graphite while also better protecting the graphite's ultra-large flake structure. The optimal fusion temperature is 400 °C, the optimal acid leaching time is 30% sulfuric acid thrice and 5% hydrofluoric acid once. After purification, the fixed carbon content of the product exceeds 99.97%.

Low-temperature co-pyrolysis of a low-rank coal and biomass to prepare smokeless fuel briquettes

2003 ◽  
Vol 70 (2) ◽  
pp. 665-677 ◽  
Author(s):  
M.J Blesa ◽  
J.L Miranda ◽  
R Moliner ◽  
M.T Izquierdo ◽  
J.M Palacios
Keyword(s):  
Low Temperature ◽  
Low Rank ◽  
Low Rank Coal

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

2016 ◽  
Vol 46 (11) ◽  
pp. 1963-1968 ◽  
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.

Effects of low-temperature air plasma pretreatment on the surface properties of low-rank coal

2018 ◽  
Vol 340 ◽  
pp. 227-233 ◽  
Author(s):  
Dapeng Wang ◽  
Meng Xu ◽  
Jingfeng He ◽  
Chao Guo
Keyword(s):  
Low Temperature ◽  
Surface Properties ◽  
Low Rank ◽  
Air Plasma ◽  
Low Rank Coal ◽  
Plasma Pretreatment
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