Temperature-resolved evolution and speciation of sulfur during pyrolysis of a high-sulfur petroleum coke

Yu, Xin; Yu, Dunxi; Yu, Ge; Liu, Fangqi; Han, Jingkun; Wu, Jianhui; Xu, Minghou

doi:10.1016/j.fuel.2021.120609

Cited by 21 publications

(13 citation statements)

References 61 publications

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“…% during the increasing final pyrolysis temperature (600–1000 °C). Both the content and trend were significantly different compared to the study of Yu et al [ 49 ]. According to the explanation of Yu et al [ 49 ] for the twice increase of thiophene, the selected particle sizes were concerned.…”

Section: The Effect Of the Evolution Of Functional Groups On Hg ...contrasting

confidence: 83%

“…Meanwhile, sulfoxide, sulfone, and sulfate were detected in very small quantities. Yu et al [ 49 ] detected the content of total sulfur and surface sulfur by element analyzer and XPS method, respectively. It was found that the surface content of S in the original HSPC sample was about 2.64% which was far lower than the results of element analysis which was 4.2%.…”

Section: The Effect Of the Evolution Of Functional Groups On Hg ...mentioning

confidence: 99%

“…This evidently showed a relatively big difference in the content of sulfur between the surface and the interior of HSPC. The specific forms and corresponding containing shares of HSPC pyrolyzed in the heating rate of 10 K/min and 30 K/min were given out shown in Figure 3 [ 49 ]. In detail, the surface S of the raw HSPC includes various forms including thiophene, sulfoxide, mercaptan, sulfate, and sulfone.…”

Section: The Effect Of the Evolution Of Functional Groups On Hg ...mentioning

confidence: 99%

“…Despite this, it is critical to better expose the stable thiophene in HSPC to provide more active sites for Hg 0 removal. Yu et al [ 49 ] explored the evolution of the speciation of sulfur in both gas and solid phase during pyrolysis where the pyrolysis temperatures are in the range of 500–1375 °C. The desulfurization ratio increased with increasing temperature or decreasing heating rate.…”

Section: The Effect Of the Evolution Of Functional Groups On Hg ...mentioning

confidence: 99%

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The Effects of Physical-Chemical Evolution of High-Sulfur Petroleum Coke on Hg0 Removal from Coal-Fired Flue Gas and Exploration of Its Micro-Scale Mechanism

Jiang

Diao

2022

IJERPH

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As the solid waste by-product from the delayed coking process, high-sulfur petroleum coke (HSPC), which is hardly used for green utilization, becomes a promising raw material for Hg0 removal from coal-fired flue gas. The effects of the physical–chemical evolution of HSPC on Hg0 removal are discussed. The improved micropores created by pyrolysis and KOH activation could lead to over 50% of Hg0 removal efficiency with the loss of inherent sulfur. Additional S-containing and Br-containing additives are usually introduced to enhance active surface functional groups for Hg0 oxidation, where the main product are HgS, HgBr, and HgBr2. The chemical–mechanical activation method can make additives well loaded on the surface for Hg0 removal. The DFT method is used to sufficiently explain the micro-scale reaction mechanism of Hg0 oxidation on the surface of revised-HSPC. ReaxFF is usually employed for the simulation of the pyrolysis of HSPC. However, the developed mesoporous structure would be a better choice for Hg0 removal in that the coupled influence of pore structure and functional groups plays a comprehensive role in both adsorption and oxidation of Hg0. Thus, the optimal porous structure should be further explored. On the other hand, both internal and surface sulfur in HSPC should be enhanced to be exposed to saving sulfur additives or obtaining higher Hg0 removal capacity. For it, controllable pyrolysis with different pyrolysis parameters and the chemical–mechanical activation method is recommended to both improve pore structure and increase functional groups for Hg0 removal. For simulation methods, ReaxFF and DFT theory are expected to explain the micro-scale mechanisms of controllable pyrolysis, the chemical–mechanical activation of HSPC, and further Hg0 removal. This review work aims to provide both experimental and simulational guidance to promote the development of industrial application of Hg0 adsorbent based on HSPC.

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Section: The Effect Of the Evolution Of Functional Groups On Hg ...contrasting

confidence: 83%

Section: The Effect Of the Evolution Of Functional Groups On Hg ...mentioning

confidence: 99%

Section: The Effect Of the Evolution Of Functional Groups On Hg ...mentioning

confidence: 99%

Section: The Effect Of the Evolution Of Functional Groups On Hg ...mentioning

confidence: 99%

See 2 more Smart Citations

The Effects of Physical-Chemical Evolution of High-Sulfur Petroleum Coke on Hg0 Removal from Coal-Fired Flue Gas and Exploration of Its Micro-Scale Mechanism

Jiang

Diao

2022

IJERPH

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“…This combination revealed the complexity of sulfur chemistry in coal combustion and allowed us to better understand the individual phenomena resulting in the formation of the different SO X precursors [ 266 , 267 ]. Yu et al determined the temperature-resolved evolution and speciation of sulfur during pyrolysis of a high-sulfur petroleum coke [ 268 ].…”

Section: Applications To Sulfurmentioning

confidence: 99%

On-Line Thermally Induced Evolved Gas Analysis: An Update—Part 1: EGA-MS

et al. 2022

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Advances in on-line thermally induced evolved gas analysis (OLTI-EGA) have been systematically reported by our group to update their applications in several different fields and to provide useful starting references. The importance of an accurate interpretation of the thermally-induced reaction mechanism which involves the formation of gaseous species is necessary to obtain the characterization of the evolved products. In this review, applications of Evolved Gas Analysis (EGA) performed by on-line coupling heating devices to mass spectrometry (EGA-MS), are reported. Reported references clearly demonstrate that the characterization of the nature of volatile products released by a substance subjected to a controlled temperature program allows us to prove a supposed reaction or composition, either under isothermal or under heating conditions. Selected 2019, 2020, and 2021 references are collected and briefly described in this review.

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Theoretical study on the mechanism of sulfur migration to gas in the pyrolysis of benzothiophene

Liu

Yang

Zhao

et al. 2022

Front. Chem. Sci. Eng.

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Temperature-resolved evolution and speciation of sulfur during pyrolysis of a high-sulfur petroleum coke

Cited by 21 publications

References 61 publications

The Effects of Physical-Chemical Evolution of High-Sulfur Petroleum Coke on Hg0 Removal from Coal-Fired Flue Gas and Exploration of Its Micro-Scale Mechanism

The Effects of Physical-Chemical Evolution of High-Sulfur Petroleum Coke on Hg0 Removal from Coal-Fired Flue Gas and Exploration of Its Micro-Scale Mechanism

On-Line Thermally Induced Evolved Gas Analysis: An Update—Part 1: EGA-MS

Theoretical study on the mechanism of sulfur migration to gas in the pyrolysis of benzothiophene

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