Yang et al. (2019b) applied pretreatment on fine coal using compression and investigated the impact of pore structure on collector adsorption and flotation of low rank coal. With …

Low-rank coal (LRC) is a widely used energy source for power plants, contributing about 45% of the total global coal reserves [1].However, the most apparent difference between …

utilization of low-rank and low-quality coals and to reduce environmental pollution in spite of higher energy demand, clean coal technologies could play a key role across the globe. …

coals. Lower rank coals can use the difference between total moisture and the equilibrium moisture measurements to estimate surface moisture, although any estimate of the surface …

Coal rank is the measure of the degree of organic metamorphism (coalification) of a coal, ranging from low-rank peat to high-rank meta-anthracite (Table 3.1.5).Rank can be determined through …

Low-rank coal reservoirs of Badaowan Formation and Xishanyao Formation are mainly developed in Junggar Basin. This paper discussed their features and coalbed methane …

For a low-rank coal containing > 2150–2520 ppm Na and/or < 19 wt% moisture, the washing process proposed would turn economically unviable compared to the existing …

Flotation is widely used for low-rank coal upgrading, although it is always inefficient due to its rough surface morphology and rich oxygen-containing functional groups. …

The development for processing technologies of low rank coal such as lignite and subbituminous coal, which has disadvantages such as non-agglomerating property, low calorific value …

The flotation cleaning of low-rank coal is not only a challenge but also a necessary requirement for coal production industry and environmental protection. From the literature, the …

The efficient and clean utilization of low-rank coal is vital for the sustainable development of the mineral processing industry. As high-grade coal resources become …

In this study the effect of a flotation device as well as non-conventional collectors and diesel oil on flotation response of low rank coal was investigated at different conditioning …

The invention discloses an oil washing purification system for low-rank coal pyrolysis gas. The oil washing purification system comprises an oil washing tower which comprises a lower tower, a …

Acid-washing low-rank coal samples were loaded with different content of iron catalyst and then pyrolyzed. FT-IR, Raman spectra, and temperature-programmed …

The cleaning potential of a low-rank lignite coal has been evaluated via dense medium separation (DMS), Reichert spiral and flotation techniques. The washability …

Pyrolysis is a common technique used to process low-rank coal (LRC), primarily through medium-low temperature dry distillation, to produce tar, char, and syngas [3, 4].Pyrolysis can be …

The acid washing method was used to treat low-rank coal, and the density gradient centrifugation method was adopted to obtain the coal macerals. By combining …

Dry cleaning of low rank coal which has not been exposed to preliminary preparation is inefficient. It was suggested that to provide dry cleaning of high-ash coal it would …

A subbituminous coal was treated with a wash oil or 1-methyl naphthalene (MN), for 1 hr or 2 hr at 673 K or 693 K under nitrogen, in order to chemically upgrade the low-rank coal.

Request PDF | On Mar 1, 2024, Bin Yang and others published Cleaning and upgrading of low-rank coal using a novel rotary triboelectric separator with the polyvinyl chloride as friction …

Most of the coal resources are classified as low rank coal where the coal in South Sumatra has a range of heat values from 4200-7785 kcal/kg with a humidity of 4.40% -41.00% …

Low rank coal with abundant reserves and high carbon content has attracted the attention of academic and industrial circles, and is regarded as a potential precursor for …

Three potential low-rank coal demineralisation processes have been simulated, a single-stage water washing process incorporating evaporator to recycle the waste water, a three-stage …

This paper describes the physical coal cleaning tests conducted on Makerwal coal to utilize these vast resources of coal. The objective is to develop an efficient and cost-effective process for up …