Influence of the hydrothermal dewatering on the combustion characteristics of Chinese low-rank coals

Ge, Lichao; Zhang, Yanwei; Xu, Chang; Wang, Zhihua; Zhou, Junhu; Cen, Kefa

doi:10.1016/j.applthermaleng.2015.07.015

Cited by 93 publications

(48 citation statements)

References 35 publications

(37 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Encinar et al [20] described that the main reaction is only reactions (5) and (6) under an atmospheric pressure at 600-800°C among these reactions, because reaction (7) requires high temperature and reactions (8) and (9) require high pressure. From the results that only H 2 , CO, and CO 2 were produced (Table IV), reactions (5) and (6) were considered to take place mainly in our experiment.…”

Section: Resultsmentioning

confidence: 99%

Steam co-gasification of iron-loaded biochar and low-rank coal

Shen

Murakami

2016

Int. J. Energy Res.

View full text Add to dashboard Cite

SUMMARYSteam co-gasification of iron catalyst-loaded biochar, which was produced by the pyrolysis of woody biomass and Indonesian Adaro subbituminous coal at 800°C, was carried out in this study. The main purpose of this work was to examine the effectiveness of an iron catalyst loaded on biochar for hydrogen (H 2 ) evolution. It was shown that the H 2 evolution for a mixed sample of iron-loaded biochar (20 wt%) and Indonesian Adaro subbituminous coal increased by 20% compared with that for the coal sample with the same amount of iron catalyst and was approximately 1.5 that for the coal sample without the iron catalyst. This increase in the co-gasification H 2 evolution was explained by the chemical form and crystallite size of the iron catalyst.

show abstract

Section: Resultsmentioning

confidence: 99%

Steam co-gasification of iron-loaded biochar and low-rank coal

Shen

Murakami

2016

Int. J. Energy Res.

View full text Add to dashboard Cite

show abstract

“…Wavelength ( 4 . This result was believed to be caused by the ordered pore structure formatted during the programming heating process of the oil shale retorting [6].…”

Section: Labelmentioning

confidence: 99%

“…Low-rank coals (i.e., lignite, brown coal and sub-bituminous coals) possess a special place in the energy system of China, since the reserves of lignite are about 41.18% in the total amount in the country [2]. In other words, it is the most important domestic source and thus, the main fuel for power generation [3,4]. Therefore, the exploitation of lignite is necessary for the growing energy demands and the depletion of high-rank coals.…”

Section: Introductionmentioning

confidence: 99%

Catalytic characteristics of the pyrolysis of lignite over oil shale chars

2016

Applied Thermal Engineering

View full text Add to dashboard Cite

“…The thermal behaviour of coal is determined mostly by using TG. Although, many works on biomass combustion with TG [11][12][13][14][15] and coal combustion [16][17][18][19][20][21][22][23] are available in the literature, investigations on 'enriched coal' are rather less [24][25][26]. The enrichment of coal provides an opportunity for the separation of coals and their maceral composition due to the difference of densities [27].…”

Section: Journal Of Combustionmentioning

confidence: 99%

Investigation of the Thermal Improvement and the Kinetic Analysis of the Enriched Coal

Duzyol

Şensöğüt

2018

Journal of Combustion

View full text Add to dashboard Cite

The present research work is comprised of three main parts. The first part is about the enrichment of lignite coal by the utilization of dense medium separation called float and sink method. The second part deals with the investigation of the thermal behaviour for the coals enriched while the last part is concerned with the kinetic analysis of the coal combustion. The float and sink method is the mostly used technique for low-rank coal beneficiation in coal preparation plants of Turkey. In order to realize this process, the coal samples were, at first, fractioned to five different sizes which were -32+25 mm, -25+16 mm, -16+8 mm, -8+4.75 mm, and -4.75+2 mm. Each fraction was, then, processed in the dense mediums with the specific gravities of 1.20, 1.30, 1.40, 1.50, and 1.60 g/cm3, respectively. The thermal behaviour of the floated materials from the float and sink process was investigated in detail with the thermogravimetric analysis (TG) and the differential thermogravimetric analysis (DTG). The ignition and peak temperatures for the samples were also ascertained and correlated with the float and sink test results. In the final part of the study, the kinetic analysis of the coal samples was carried out by the Coats–Redfern method and the activation energies of the enriched coals were determined. The activation energies of the raw and the enriched coals were assessed and compared. The calculated activation energy values for the combustion reactions of the coal samples ranged were found to be between 15.17 kJ/mol and 97.45 kJ/mol. The strong correlation was obtained between the float and sink test results especially with the ash content of the coal samples and the combustible characteristic of the floated materials such as ignition temperatures, peak temperatures, and activation energies. The combustion characteristics of the coal samples were resultantly ascertained to be very dependent on the coal structure.

show abstract

Influence of the hydrothermal dewatering on the combustion characteristics of Chinese low-rank coals

Cited by 93 publications

References 35 publications

Steam co-gasification of iron-loaded biochar and low-rank coal

Steam co-gasification of iron-loaded biochar and low-rank coal

Catalytic characteristics of the pyrolysis of lignite over oil shale chars

Investigation of the Thermal Improvement and the Kinetic Analysis of the Enriched Coal

Contact Info

Product

Resources

About