Effect of ash – ZnO heat carrier on sulfur migration behavior during pyrolysis of coal

Meng, Xiuxia; Yang, Jianyun; Ye, Ze-fu; Chu, Ruizhi; Wang, Chenxiao; Li, Weisong; Li, Xiao; Li, Feng; Jiang, Xiaofeng

doi:10.1016/j.fuel.2021.121993

Cited by 7 publications

(4 citation statements)

References 40 publications

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“…2 of solid particles, forming cokes by polymerization. Meng et al [14] studied the effects of ash-ZnO heat carrier (A-ZHC) on the release and transformation of sulfur during the pyrolysis of one highsulfur bituminous coal. Results showed that under the catalytic action of A-ZHC, sulfur was more inclined to transfer from tar to char in forms of sulfide and sulfone sulfur.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Solid Heat Carrier Load of Char on Pyrolysis Characteristics of Pulverized Coal in a Fluidized Bed Reactor

Li,

Qi,

Chen

et al. 2024

Preprint

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Pulverized coal pyrolysis based on solid heat carrier has a huge advantage in high tar yield. In this study, pyrolysis experiments of pulverized coal were conducted in a lab-scale fluidized bed reactor at 650 ℃, utilizing char as the solid heat carrier. The influence of mass ratio of char to coal (RATIO) was investigated. Results show that the incorporation of solid heat carrier of char significantly enhanced the initial reaction in coal pyrolysis, resulting in increasing yields of tar and gas but reducing one of char. The yield of tar maximally reached 148.80-262.22% of the Gray-King analysis value at the RATIO of 14.52 g/g. As the RATIO increased, the tar contained more light component content, indicating that incorporating solid heat carriers improved the tar quality. These findings offer significant insights for the design of fluidized bed pyrolysis unit utilizing char as solid heat carrier.

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Section: Introductionmentioning

confidence: 99%

The Influence of Solid Heat Carrier Load of Char on Pyrolysis Characteristics of Pulverized Coal in a Fluidized Bed Reactor

Li,

Qi,

Chen

et al. 2024

Preprint

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“…Zhang et al [21] investigated the interaction between coal pyrolysis volatiles and char, showing that more sulfur was transformed to gas below 600 °C, while more sulfur remained in char above 600 °C, and the distribution of sulfur forms on char surface was closely related to sulfur conversion. Meng et al [22] investigated the effect of ash-ZnO complex on sulfur release during coal pyrolysis. Ash-ZnO inhibited the sulfur transformation to tar and gas.…”

Section: Introductionmentioning

confidence: 99%

“…Meng et al. 22 investigated the effect of ash‐ZnO complex on sulfur release during coal pyrolysis. Ash‐ZnO inhibited the sulfur transformation to tar and gas.…”

Section: Introductionmentioning

confidence: 99%

Sulfur Transformation during Coal Pyrolysis with Char Heat Carrier

et al. 2023

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To investigate sulfur transformation during coal pyrolysis with char heat carrier (CHC), the effects of temperature, CHC/coal, and CHC production temperature were explored in a fluidized bed. The yield rates of sulfur in H2S () and YCOS elevated with temperature. and Ychar‐S decreased, and temperature showed no significant effect on Ytar‐S. CHC inhibited sulfur transformation to the gas phase. More H2S and COS were fixed in mixed‐char in form of CaS by CHC, resulting in the increase of Ychar‐S. CHC was favorable for CH3SH decomposition. The inhibitory effect was enhanced with increasing CHC/coal. Higher production temperature inhibited the sulfur fixation capacity of CHC. CHC enhanced the decomposition of pyrite, organic sulfur, sulfate, and the yield of sulfide in mixed‐char.

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“…Gaseous sulfur emitted from industrial production processes from industries such as chemical, metallurgical, and power industries is one of the culprits that endanger the natural environment and human health. − Hence, environmental protection regulations for gaseous sulfide emissions from industrial production processes are becoming increasingly stringent all over the world. Blast furnace gas (BFG), as a combustible by-product of the ironmaking process, is an important secondary energy.…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis Behavior of Pyrite under a CO–H₂ Atmosphere

et al. 2022

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The transformation behavior of pyrite (FeS 2 ) in the blast furnace process is critical to control the formation and emission of gaseous sulfides in the top gas of ironmaking but has seldom been explored. In present work, the pyrolysis of pyrite from 200 to 900 °C under a CO–H 2 atmosphere was investigated by thermal-gravimetric and mass spectrometry. The thermodynamic theoretical calculations were carried out to further understand the transformation process. The results show that FeS 2 is almost completely reduced to FeS under various CO–H 2 atmospheres. H 2 S and carbonyl sulfide (COS) are the main gaseous sulfides formed through the pyrolysis reactions of FeS 2 under a CO–H 2 atmosphere. A higher H 2 concentration can reduce the pyrolysis reaction temperature of FeS 2 , which is favorable for the conversion of sulfides to H 2 S, while a higher CO concentration promotes the conversion of sulfides to COS. Besides, the pyrolysis products of FeS 2 by order from the former to latter under a strong reductive atmosphere (CO–H 2 ) with increasing temperature are as follows: COS → S → H 2 S → S 2 → CS 2 .

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Effect of ash – ZnO heat carrier on sulfur migration behavior during pyrolysis of coal

Cited by 7 publications

References 40 publications

The Influence of Solid Heat Carrier Load of Char on Pyrolysis Characteristics of Pulverized Coal in a Fluidized Bed Reactor

The Influence of Solid Heat Carrier Load of Char on Pyrolysis Characteristics of Pulverized Coal in a Fluidized Bed Reactor

Sulfur Transformation during Coal Pyrolysis with Char Heat Carrier

Pyrolysis Behavior of Pyrite under a CO–H₂ Atmosphere

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Effect of ash – ZnO heat carrier on sulfur migration behavior during pyrolysis of coal

Cited by 7 publications

References 40 publications

The Influence of Solid Heat Carrier Load of Char on Pyrolysis Characteristics of Pulverized Coal in a Fluidized Bed Reactor

The Influence of Solid Heat Carrier Load of Char on Pyrolysis Characteristics of Pulverized Coal in a Fluidized Bed Reactor

Sulfur Transformation during Coal Pyrolysis with Char Heat Carrier

Pyrolysis Behavior of Pyrite under a CO–H2 Atmosphere

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Pyrolysis Behavior of Pyrite under a CO–H₂ Atmosphere