Experimental investigation on the evolution characteristics of anthracite-N and semi-coke reactivity under various O2/H2O pre-oxidation atmospheres

Zhuozhi Wang; Lei Zhang; Yaying Zhao; Shuo Feng; Jiao Ma; Wenwen Kong; Boxiong Shen; Rui Sun

doi:10.1016/j.fuproc.2021.106725

Experimental investigation on the evolution characteristics of anthracite-N and semi-coke reactivity under various O₂/H₂O pre-oxidation atmospheres

Zhuozhi Wang
, Lei Zhang
, Yaying Zhao
, Shuo Feng
, Jiao Ma
, Wenwen Kong
, Boxiong Shen^*
, Rui Sun^*

^*Corresponding author for this work

Hebei University of Technology
Tianjin Key Laboratory of Clean Energy and Pollutant Control
School of Energy Science and Engineering, Harbin Institute of Technology
Northeast Electric Power University

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

52 Scopus citations

Abstract

O₂/H₂O pre-oxidation could be regarded as a promising approach for clean and high efficiency utilization of high rank coals. A typical anthracite was employed for experimental clarification on anthracite-N evolution characteristics during O₂/H₂O pre-oxidation. The correlation among reaction atmosphere, nitrogen stripping efficiency and anthracite-N desorption characteristic was evaluated. The emission characteristics of nitrogen containing gaseous species and combustion reactivity of each pre-oxidized semi-coke were identified by utilizing XPS, TPD, Raman and TGA. Both O₂ and H₂O could synergistically accelerate the crack of large aromatic structures into small and reactive ones, leading to the migration of abundant nitrogen atoms initially located inside the aromatic structures to the edge during the O₂/H₂O pre-oxidation process. The decomposition of condensed aromatic systems would strengthen the reactivity of semi-coke particles. Nevertheless, excessive H₂O (> 10 vol%) would generate massive •H which could penetrate into the matrix of anthracite particles, reducing the total amount of active structures on semi-coke surface.

Original language	English
Article number	106725
Journal	Fuel Processing Technology
Volume	216
DOIs	https://doi.org/10.1016/j.fuproc.2021.106725
State	Published - 1 Jun 2021
Externally published	Yes

Keywords

Anthracite
Combustion
Functional group
NO
Pre-oxidation
Semi-coke

Access to Document

10.1016/j.fuproc.2021.106725

Cite this

@article{d4343939f53c4aa284e938a7fbd370d7,

title = "Experimental investigation on the evolution characteristics of anthracite-N and semi-coke reactivity under various O2/H2O pre-oxidation atmospheres",

abstract = "O2/H2O pre-oxidation could be regarded as a promising approach for clean and high efficiency utilization of high rank coals. A typical anthracite was employed for experimental clarification on anthracite-N evolution characteristics during O2/H2O pre-oxidation. The correlation among reaction atmosphere, nitrogen stripping efficiency and anthracite-N desorption characteristic was evaluated. The emission characteristics of nitrogen containing gaseous species and combustion reactivity of each pre-oxidized semi-coke were identified by utilizing XPS, TPD, Raman and TGA. Both O2 and H2O could synergistically accelerate the crack of large aromatic structures into small and reactive ones, leading to the migration of abundant nitrogen atoms initially located inside the aromatic structures to the edge during the O2/H2O pre-oxidation process. The decomposition of condensed aromatic systems would strengthen the reactivity of semi-coke particles. Nevertheless, excessive H2O (> 10 vol\%) would generate massive •H which could penetrate into the matrix of anthracite particles, reducing the total amount of active structures on semi-coke surface.",

keywords = "Anthracite, Combustion, Functional group, NO, Pre-oxidation, Semi-coke",

author = "Zhuozhi Wang and Lei Zhang and Yaying Zhao and Shuo Feng and Jiao Ma and Wenwen Kong and Boxiong Shen and Rui Sun",

note = "Publisher Copyright: {\textcopyright} 2021",

year = "2021",

month = jun,

day = "1",

doi = "10.1016/j.fuproc.2021.106725",

language = "英语",

volume = "216",

journal = "Fuel Processing Technology",

issn = "0378-3820",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Experimental investigation on the evolution characteristics of anthracite-N and semi-coke reactivity under various O2/H2O pre-oxidation atmospheres

AU - Wang, Zhuozhi

AU - Zhang, Lei

AU - Zhao, Yaying

AU - Feng, Shuo

AU - Ma, Jiao

AU - Kong, Wenwen

AU - Shen, Boxiong

AU - Sun, Rui

PY - 2021/6/1

Y1 - 2021/6/1

N2 - O2/H2O pre-oxidation could be regarded as a promising approach for clean and high efficiency utilization of high rank coals. A typical anthracite was employed for experimental clarification on anthracite-N evolution characteristics during O2/H2O pre-oxidation. The correlation among reaction atmosphere, nitrogen stripping efficiency and anthracite-N desorption characteristic was evaluated. The emission characteristics of nitrogen containing gaseous species and combustion reactivity of each pre-oxidized semi-coke were identified by utilizing XPS, TPD, Raman and TGA. Both O2 and H2O could synergistically accelerate the crack of large aromatic structures into small and reactive ones, leading to the migration of abundant nitrogen atoms initially located inside the aromatic structures to the edge during the O2/H2O pre-oxidation process. The decomposition of condensed aromatic systems would strengthen the reactivity of semi-coke particles. Nevertheless, excessive H2O (> 10 vol%) would generate massive •H which could penetrate into the matrix of anthracite particles, reducing the total amount of active structures on semi-coke surface.

AB - O2/H2O pre-oxidation could be regarded as a promising approach for clean and high efficiency utilization of high rank coals. A typical anthracite was employed for experimental clarification on anthracite-N evolution characteristics during O2/H2O pre-oxidation. The correlation among reaction atmosphere, nitrogen stripping efficiency and anthracite-N desorption characteristic was evaluated. The emission characteristics of nitrogen containing gaseous species and combustion reactivity of each pre-oxidized semi-coke were identified by utilizing XPS, TPD, Raman and TGA. Both O2 and H2O could synergistically accelerate the crack of large aromatic structures into small and reactive ones, leading to the migration of abundant nitrogen atoms initially located inside the aromatic structures to the edge during the O2/H2O pre-oxidation process. The decomposition of condensed aromatic systems would strengthen the reactivity of semi-coke particles. Nevertheless, excessive H2O (> 10 vol%) would generate massive •H which could penetrate into the matrix of anthracite particles, reducing the total amount of active structures on semi-coke surface.

KW - Anthracite

KW - Combustion

KW - Functional group

KW - NO

KW - Pre-oxidation

KW - Semi-coke

UR - https://www.scopus.com/pages/publications/85101556967

U2 - 10.1016/j.fuproc.2021.106725

DO - 10.1016/j.fuproc.2021.106725

M3 - 文章

AN - SCOPUS:85101556967

SN - 0378-3820

VL - 216

JO - Fuel Processing Technology

JF - Fuel Processing Technology

M1 - 106725

ER -

Experimental investigation on the evolution characteristics of anthracite-N and semi-coke reactivity under various O₂/H₂O pre-oxidation atmospheres

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this