Variation of Coal Char Surface Chemical Structure During Oxidation Process

Zhuozhi Wang; Rui Sun; Hao Yuan; Xingzhou Zhang; Yupeng Li; Shaozeng Sun

doi:10.11715/rskxjs.R201703019

Variation of Coal Char Surface Chemical Structure During Oxidation Process

Zhuozhi Wang
, Rui Sun^*
, Hao Yuan
, Xingzhou Zhang
, Yupeng Li
, Shaozeng Sun

^*Corresponding author for this work

School of Energy Science and Engineering, Harbin Institute of Technology
China State Shipbuilding Corporation

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

A typical Chinese coal was employed for this research, and the char was oxidized to five conversion degrees (0.21, 0.34, 0.40, 0.53 and 0.63). With the application of high temperature programmed desorption (TPD) and Fourier transform infrared spectroscopy (FT-IR), the chemical structure of surface complexes on different samples was investigated. Results showed that in the oxidation process, the number of active sites on particle surface decreased with the increase of conversion ratio. The specific chemicals of oxygen-containing complexes on particle surface are hydroxyl, carboxyl, ether, quinone, lactone and anhydride. Anhydride, lactone and quinone were the precursors of CO, and ether and quinone were the precursors of CO₂.

Original language	English
Pages (from-to)	418-423
Number of pages	6
Journal	Ranshao Kexue Yu Jishu/Journal of Combustion Science and Technology
Volume	23
Issue number	5
DOIs	https://doi.org/10.11715/rskxjs.R201703019
State	Published - 15 Oct 2017
Externally published	Yes

Keywords

Active site
Char
Functional group
Surface complexes

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10.11715/rskxjs.R201703019

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title = "Variation of Coal Char Surface Chemical Structure During Oxidation Process",

abstract = "A typical Chinese coal was employed for this research, and the char was oxidized to five conversion degrees (0.21, 0.34, 0.40, 0.53 and 0.63). With the application of high temperature programmed desorption (TPD) and Fourier transform infrared spectroscopy (FT-IR), the chemical structure of surface complexes on different samples was investigated. Results showed that in the oxidation process, the number of active sites on particle surface decreased with the increase of conversion ratio. The specific chemicals of oxygen-containing complexes on particle surface are hydroxyl, carboxyl, ether, quinone, lactone and anhydride. Anhydride, lactone and quinone were the precursors of CO, and ether and quinone were the precursors of CO2.",

keywords = "Active site, Char, Functional group, Surface complexes",

author = "Zhuozhi Wang and Rui Sun and Hao Yuan and Xingzhou Zhang and Yupeng Li and Shaozeng Sun",

year = "2017",

month = oct,

day = "15",

doi = "10.11715/rskxjs.R201703019",

language = "英语",

volume = "23",

pages = "418--423",

journal = "Ranshao Kexue Yu Jishu/Journal of Combustion Science and Technology",

issn = "1006-8740",

publisher = "Tianjin University",

number = "5",

}

TY - JOUR

T1 - Variation of Coal Char Surface Chemical Structure During Oxidation Process

AU - Wang, Zhuozhi

AU - Sun, Rui

AU - Yuan, Hao

AU - Zhang, Xingzhou

AU - Li, Yupeng

AU - Sun, Shaozeng

PY - 2017/10/15

Y1 - 2017/10/15

N2 - A typical Chinese coal was employed for this research, and the char was oxidized to five conversion degrees (0.21, 0.34, 0.40, 0.53 and 0.63). With the application of high temperature programmed desorption (TPD) and Fourier transform infrared spectroscopy (FT-IR), the chemical structure of surface complexes on different samples was investigated. Results showed that in the oxidation process, the number of active sites on particle surface decreased with the increase of conversion ratio. The specific chemicals of oxygen-containing complexes on particle surface are hydroxyl, carboxyl, ether, quinone, lactone and anhydride. Anhydride, lactone and quinone were the precursors of CO, and ether and quinone were the precursors of CO2.

AB - A typical Chinese coal was employed for this research, and the char was oxidized to five conversion degrees (0.21, 0.34, 0.40, 0.53 and 0.63). With the application of high temperature programmed desorption (TPD) and Fourier transform infrared spectroscopy (FT-IR), the chemical structure of surface complexes on different samples was investigated. Results showed that in the oxidation process, the number of active sites on particle surface decreased with the increase of conversion ratio. The specific chemicals of oxygen-containing complexes on particle surface are hydroxyl, carboxyl, ether, quinone, lactone and anhydride. Anhydride, lactone and quinone were the precursors of CO, and ether and quinone were the precursors of CO2.

KW - Active site

KW - Char

KW - Functional group

KW - Surface complexes

UR - https://www.scopus.com/pages/publications/85034264064

U2 - 10.11715/rskxjs.R201703019

DO - 10.11715/rskxjs.R201703019

M3 - 文章

AN - SCOPUS:85034264064

SN - 1006-8740

VL - 23

SP - 418

EP - 423

JO - Ranshao Kexue Yu Jishu/Journal of Combustion Science and Technology

JF - Ranshao Kexue Yu Jishu/Journal of Combustion Science and Technology

IS - 5

ER -

Variation of Coal Char Surface Chemical Structure During Oxidation Process

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Keywords

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