Microwave-assisted KOH activated lignite semi-coke for …

Lignite semi-coke was purchased from Zhong Biao Carbon Corporation, China. BTW was from a pulp and paper mill in Zhejiang Province, China. The wastewater from the pulp and paper mill is treated by the IC anaerobic reactor and the activated sludge method. Table 1 shows the characteristics of BTW before and after LSC and MLSC …

Preparation of High Strength Coke from Indonesian Lignite …

Coke production from lignite was studied as a continuation of research showing the effectiveness of a sequence of hot briquettes and carbonization on preparations high strength coke from Indonesian lignite. The hot briquetting and carbonization cokes from three Indonesian lignites with a deeply pulverized. Ball milling …

Preparation of Coke from Indonesian Lignites by a Sequence …

The lignite-coke showed faster decrease in the strength during gasification, compared to conventional cokes derived from caking coal or non-or slightly caking coal, due to the high reactivity ...

Types of Coal: Peat, Lignite, Bituminous Coal & Anthracite Coal …

Coals are classified into three main ranks, or types: lignite, bituminous coal, and anthracite. These classifications are based on the amount of carbon, oxygen, and hydrogen present in the coal. Coals other constituents include hydrogen, oxygen, nitrogen, ash, and sulfur. Some of the undesirable chemical constituents include chlorine and …

Production and Use of Lignite-Based Coke Briquets with …

This blend (57.7% lignite coke + 19.2% binder + 23.1% additive) is shaped into briquets, which are roasted at 1000°C and cooled in the absence of air. For the …

Preparation of Coke from Indonesian Lignites by a Sequence …

Abstract. Production of coke from lignites was studied in continuation of a previous study that demonstrated effectiveness of a sequence of hot briquetting and …

(PDF) Comparison of metallurgical coke and …

Regarding to energy profitability, the lignite coke is considered to be much more beneficial than the metallurgical coke in contrast to the environmental concerns. However, the metallurgical coke ...

Use of Alternative Raw Materials in Coke Making: New

producing blast furnace coke with the use of a certain amount of lignite. In particular, this gap concerns the impact of lignite addition on the most important parameters currently …

Preparation of High-Strength Coke by Carbonization of Hot …

Preparation of Coke from Indonesian Lignites by a Sequence of Hydrothermal Treatment, Hot Briquetting, and Carbonization. Energy & Fuels 2013, 27 (11), 6607-6616. …

Combustion performance of semi-coke from Inner Mongolia lignite …

The combustion performance of semi-coke can be predicted accurately via the fuel ratio of semi-coke. The combustion characteristics of semi-coke from Inner Mongolia lignite was found ...

Investigation of bonding mechanism of coking on semi-coke from lignite

@article{osti_20823797, title = {Investigation of bonding mechanism of coking on semi-coke from lignite with pitch and tar}, author = {Arslan, Vedat}, abstractNote = {In coking, the bonding ability of inert macerals by reactive macerals is dependent on various parameters and also is related to the wettability of the inert macerals. In this …

Comparative study on coal blending and coke-making …

Despite of its abundant reserves and low price, the high oxygen content and cross-linking extent of lignite making it difficult to extract through TD and unsuitable for coal blending and coke-making. Our previous work showed that Shenli lignite could be efficiently extracted with mixed solvents of 1-methylnaphathalene (1-MN) added with 10% ...

Improving slurryability, rheology, and stability of slurry

Petroleum coke and lignite are two important fossil fuels that have not been widely used in China. Petroleum coke–lignite slurry (PCLS), a mixture of petroleum coke, lignite, water, and additives, efficiently utilizes the two materials. In this study, we investigate the effects of the proportion (α) of petroleum coke on slurryability, rheological …

Coke production from low rank coals

The application of lignite coke dust is not limited to blast furnace processes, where especially a high carbon content and a high heating value are desirable. In addition, the BET area of the lignite coke dust is about 310 m²/g and can be easily increased by adjusting some process parameters. This property in combination with the high sulfur ...

3XOYHUL]HG

A recent study [1] claimed preparation of coke from a type of lignite, which had tensile strength much higher than those of commercial metallurgical cokes. The key process …

What are the types of coal? | U.S. Geological Survey

Lignite: Lignite coal, aka brown coal, is the lowest grade coal with the least concentration of carbon. Lignite has a low heating value and a high moisture content and is mainly used in electricity generation. The precursor to coal is peat. Peat is a soft, organic material consisting of partly decayed plant and mineral matter.

Thermal Analysis of the Combustion of Lignite–Biomass Mixtures | Coke

The combustion of lignite, biomass (pine cones), and their mixtures (in different proportions) is investigated by simultaneous thermal analysis. In the analysis, ~6-mg samples are heated in an oxidative atmosphere at 20°C/min, with an air flow rate of 50 mL/min. The thermal characteristics and elemental composition of the solid fuels are …

(PDF) Effect of SiO2 on Loss of Catalysis of …

SEM photographs of fractured surfaces of coke from SiO 2 -blended lignite with f SiO2 = 9.2 wt%. Bright areas indicated by circles are attributed to SiO 2 or SiO 2 -rich parts of the surface.

Characteristic Properties of Lignite To Be Converted to

A stronger coke was obtained from lignite that contained more aliphatic carbons (less aromatic carbons) or shrank more considerably. These characteristics …

Comparison of metallurgical coke and lignite coke for power …

On the other hand, the coke produced from lignite is known as it is the lowest grade from coal and it causes the high pollution. Regarding to energy profitability, the …

LigniteCoke Briquets in Ferroalloy Production

valuable byproduct: hightemperature lignite coke. In the coproduction of coke and thermal energy, the economic efficiency of the product is somewhat higher than in classical systems. For example, the pro cessing of 4 t of lignite (Qr = 3700 kcal/kg) generates 1 t of mediumtemperature coke (Qr = 7000 kcal/kg) and around 6 Gcal of useful thermal ...

Carbon Resources Conversion

by blending a Victorian lignite with SiO 2, briquetting the SiO 2/lignite blend, carbonizing the briquette, and then gasifying the coke with CO 2. The kinetic analysis of the gasification ...

Lignite

coke coal: little ash and sulphur ~ 25%: briquette coal: little ash, more sulphur unsuitable for carbonization at low temperature ~ 36%: ... Lignite is brownish-black in color and has a carbon content of around 25–35%, a high inherent moisture content, sometimes as high as 66%, and an ash content ranging from 6% to 19%, compared with 6–12% ...

DF2014:Fuel

Coke, from bituminous coal or lignite . Coke is a type of refined coal created at a smelter from either bituminous coal or lignite (producing either 9 or 5 coke, respectively) by a dwarf with the Furnace operating labor enabled. Skill levels in furnace operator reduce the time required for this activity, but do not affect the result.

Semi Coke | SpringerLink

Semi coke is the solid products, obtained from low-rank bituminous coal, lignite, or peat by carbonization at low temperature (500–750 °C) in a retort furnace. In general, semi coke is also a by-product or intermediate product of the conversion of coal into liquid and gaseous fuels (Fig. 1 ). Fig. 1.

Preparation of High-Strength Coke by Carbonization of …

Cokes with tensile strengths of 6–37 MPa were prepared by binderless briquetting and subsequent carbonization up to 900 °C of pulverized Victorian brown coal that had little fluidity and very low reflectance. Application of mechanical pressures of 64–128 MPa at temperatures of 130–200 °C caused softening of the coal because of mobilization of both …

Coal: Anthracite, Bituminous, Coke, Pictures, Formation, Uses

Lignite sometimes contains recognizable plant structures. By definition it has a heating value of less than 8300 British Thermal Units per pound on a mineral-matter-free basis. It has a carbon content of between 60 and 70% on a dry ash-free basis. ... Coke production remains an important use of coal. Coke is produced by heating coal under ...

Dynamic Adsorption of Sulfamethoxazole from …

In this paper, lignite activated coke was used as adsorbent for dynamic column adsorption experiments to remove sulfamethoxazole from aqueous solution. The effects of column height, flow rate, initial …

Ash Composition of Lignite | Coke and Chemistry

Abstract Five lignite samples from Russia's Itatsky, Munai, Arkharo-Boguchansky, and Kangalassky fields and the Mongolian Baganuur field are characterized on the basis of technical analysis, their elemental composition, calorific value, petrographic composition, and the properties of their mineral component. Experimental data regarding …

Coke, semi-coke of coal, lignite, peat & retort carbo

Ranking Coke, semi-coke of coal, lignite, peat & retort carbo ranks 2934th in the Product Complexity Index (PCI). Description Coal is a type of rock that is often used as fuel for power plants. Coke is a type of coal that has been heated to a very high temperature. Lignite is a type of coal that is low quality and not typically used for fuel.