Research on the combustion characteristics of anthracite and blended coal with composite catalysts

Wang, S.J.; Wu, Feng; Zhang, G.; Zhu, Ping; Wang, Z.Y.; Huang, Chao; Chen, S.T.

doi:10.1016/j.joei.2014.03.020

Cited by 27 publications

(8 citation statements)

References 9 publications

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“…Similarly, the

D_{f}

value for coal was reported in the range of

(0.429 - 1.48) \times 10^{- 3},

which is lower than the obtained value of oxy‐cracked petcoke. These findings suggested that the oxy‐cracked petcoke and the blends with virgin petcoke can exhibit high ignitability, flammability, and reactivity compared with currently‐used fuels like coal and biomass . Therefore, blending virgin petcoke with oxy‐cracked petcoke would have significant impacts on the performance of petcoke as a fuel, not only in enhancing the ignition condition and maximum burning rate, but also in lowering the environmental impact due to the low contribution of SOx and NOx.…”

Section: Resultsmentioning

confidence: 99%

Enhancement of petroleum coke thermal reactivity using Oxy‐cracking technique

2019

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Petroleum coke (petcoke) is a challenging fuel in terms of its complexity, high sulphur and nitrogen content, low volatile content, and undesirable emissions of SOx and NOx when used for power generation. To overcome these challenges, the oxy‐cracking process was recently proposed to convert the petcoke into a clean combustion fuel by reducing its sulphur and nitrogen contents, and consequently increasing its reactivity and combustibility. This work aimed to study the heating values and thermo‐oxidative behaviour of the oxy‐cracked petcoke, virgin petcoke, and their blends using thermogravimetric analysis (TGA). The results showed that the oxy‐cracked petcoke is oxidized at a temperature of 475 °C, which is easier and faster than the virgin petcoke, which is usually oxidized at around 540 °C. The heating value of the oxy‐cracked petcoke was not impacted and maintained constant ~30 MJ/kg, which is relatively similar to the virgin petcoke. The nitrogen and sulphur content in the oxy‐cracked petcoke is much lower than that of virgin petcoke. A significant improvement in the combustion performance parameters of the oxy‐cracked petcoke and their blends with virgin petcoke was achieved. For instance, the ignition temperature of the proposed fuel is reduced to 13 % compared to the virgin petcoke, which led to increasing the ignition index by two‐folds. Therefore, this approach might help in improving the thermal efficiency of petcoke by using oxy‐cracked products as an initiator in the combustion process.

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“…Similarly, the

D_{f}

value for coal was reported in the range of

(0.429 - 1.48) \times 10^{- 3},

Section: Resultsmentioning

confidence: 99%

Enhancement of petroleum coke thermal reactivity using Oxy‐cracking technique

2019

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“…T e is the correspondingt emperature of the intersection point of the line extended from the near-horizontal segmenta tt he endings tage of the TG curve and the tangent line of the maximum TG curve slope. [21,22] Ther esultingp yrolysis characteristic parameter valuesa re presented in Table 1.…”

Section: Resultsmentioning

confidence: 99%

Permittivity‐Based Microwave Absorption Characteristics of Dongsheng Lignite during Pyrolysis

2016

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The complex relative permittivity of Chinese Dongsheng lignite coal was acquired by testing the parameters S11 and ψS11 and adopting an artificial neural network model for calculation. The curves of relative dielectric coefficient, which vary with the temperature in the pyrolytic reaction process, were used to reflect the microwave absorption characteristics of Dongsheng lignite coal. By combining and analyzing the thermogravimetric curves, it was determined that, with the increasing pyrolysis temperature, the value of the dielectric coefficient ɛ′,ɛ′′ changes for Dongsheng lignite can be separated into three distinct stages: room temperature to 400 °C, 400–700 °C, and 700–800 °C. The microwave absorption ability for lignite enhances quickly in the range of 400–700 °C and reaches a peak value at 700 °C, which has important implications for lignite pyrolysis.

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“…Recently, based on the characteristics of MDS, which contain a relatively high ratio of Fe and Ca compounds with catalytic combustion activity, some researchers have proposed the use of MDS as a catalytic additive for PCI. − This not only realizes closed-loop absorption of dust and sludge in the metallurgical process but also improves the combustion performance of PCI . Senk et al .…”

Section: Introductionmentioning

confidence: 99%

Combustion Characteristics of Coal for Pulverized Coal Injection (PCI) Blending with Steel Plant Flying Dust and Waste Oil Sludge

et al. 2021

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Various characterization methods are used to investigate the physical and chemical properties of steel plant flying dust and waste oil sludge, and the combustion characteristics of the mixtures with pulverized coal are studied via thermogravimetric analysis; the catalytic combustion mechanism is also explored. The results show that two types of metallurgical by-products with small particle sizes and developed pores are evenly dispersed in the pulverized coal and are stably combined with it. The additives reduce the ignition temperature and the temperature corresponding to the maximum combustion rate of pulverized coal; simultaneously, they increase the heat released during pulverized coal combustion. During the pyrolysis stage of pulverized coal, the heat generated via organic component combustion in waste oil sludge promotes a cracking reaction and improves the development of the char’s micropore. During the char combustion stage, no catalyst deactivation phenomenon occurs under the ratios of inorganic components in the two types of metallurgical dust and sludge. Two additives markedly reduce the activation energy of the combustion reaction.

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Research on the combustion characteristics of anthracite and blended coal with composite catalysts

Cited by 27 publications

References 9 publications

Enhancement of petroleum coke thermal reactivity using Oxy‐cracking technique

Enhancement of petroleum coke thermal reactivity using Oxy‐cracking technique

Permittivity‐Based Microwave Absorption Characteristics of Dongsheng Lignite during Pyrolysis

Combustion Characteristics of Coal for Pulverized Coal Injection (PCI) Blending with Steel Plant Flying Dust and Waste Oil Sludge

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