Sulfur conversion and distribution during supercritical water gasification of sewage sludge

Mi Yan; Hongyu Feng; Rendong Zheng; Caimeng Yu; Dwi Hantoko; Zhihao Zhou; Yan Zhang; Ekkachai Kanchanatip

doi:10.1016/j.joei.2021.01.002

Sulfur conversion and distribution during supercritical water gasification of sewage sludge

Mi Yan, Hongyu Feng, Rendong Zheng, Caimeng Yu, Dwi Hantoko, Zhihao Zhou, Yan Zhang, Ekkachai Kanchanatip^*

^*Corresponding author for this work

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

39 Scopus citations

Abstract

In order to study the transformation and distribution of sulfur element during supercritical water gasification (SCWG) of sewage sludge, sulfur contained products in different phase were detected in batch reactor. The XPS analysis showed that organic sulfur was the main part of sulfur compounds in sewage sludge. On the other hand, inorganic sulfur was dominated by SiS₂, and SiS₂ was subsequently converted into SiO₂ and H₂S during SCWG. The increase of temperature promoted H₂S and SO₂ yield but reduced their concentration. The addition of KOH could reduce the yield and concentration of H₂S and SO₂. The minimum concentration of H₂S and SO₂ was observed at 450 °C with KOH addition, which was 1313.94 ppm and 698.03 ppm, respectively. Sulfur compound in liquid was mainly found in the form of sulfate and its concentration decreased with increasing temperature.

Original language	English
Pages (from-to)	61-68
Number of pages	8
Journal	Journal of the Energy Institute
Volume	95
DOIs	https://doi.org/10.1016/j.joei.2021.01.002
State	Published - Apr 2021
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2021 Energy Institute

Keywords

KOH
Sludge
Sulfur
Supercritical water gasification
Syngas

ASJC Scopus subject areas

Control and Systems Engineering
Renewable Energy, Sustainability and the Environment
Fuel Technology
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/j.joei.2021.01.002

Cite this

@article{65e9ae0e90ab4946a3a8e1a4bd3331b1,

title = "Sulfur conversion and distribution during supercritical water gasification of sewage sludge",

abstract = "In order to study the transformation and distribution of sulfur element during supercritical water gasification (SCWG) of sewage sludge, sulfur contained products in different phase were detected in batch reactor. The XPS analysis showed that organic sulfur was the main part of sulfur compounds in sewage sludge. On the other hand, inorganic sulfur was dominated by SiS2, and SiS2 was subsequently converted into SiO2 and H2S during SCWG. The increase of temperature promoted H2S and SO2 yield but reduced their concentration. The addition of KOH could reduce the yield and concentration of H2S and SO2. The minimum concentration of H2S and SO2 was observed at 450 °C with KOH addition, which was 1313.94 ppm and 698.03 ppm, respectively. Sulfur compound in liquid was mainly found in the form of sulfate and its concentration decreased with increasing temperature.",

keywords = "KOH, Sludge, Sulfur, Supercritical water gasification, Syngas",

author = "Mi Yan and Hongyu Feng and Rendong Zheng and Caimeng Yu and Dwi Hantoko and Zhihao Zhou and Yan Zhang and Ekkachai Kanchanatip",

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

year = "2021",

month = apr,

doi = "10.1016/j.joei.2021.01.002",

language = "English",

volume = "95",

pages = "61--68",

journal = "Journal of the Energy Institute",

issn = "1743-9671",

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TY - JOUR

T1 - Sulfur conversion and distribution during supercritical water gasification of sewage sludge

AU - Yan, Mi

AU - Feng, Hongyu

AU - Zheng, Rendong

AU - Yu, Caimeng

AU - Hantoko, Dwi

AU - Zhou, Zhihao

AU - Zhang, Yan

AU - Kanchanatip, Ekkachai

PY - 2021/4

Y1 - 2021/4

N2 - In order to study the transformation and distribution of sulfur element during supercritical water gasification (SCWG) of sewage sludge, sulfur contained products in different phase were detected in batch reactor. The XPS analysis showed that organic sulfur was the main part of sulfur compounds in sewage sludge. On the other hand, inorganic sulfur was dominated by SiS2, and SiS2 was subsequently converted into SiO2 and H2S during SCWG. The increase of temperature promoted H2S and SO2 yield but reduced their concentration. The addition of KOH could reduce the yield and concentration of H2S and SO2. The minimum concentration of H2S and SO2 was observed at 450 °C with KOH addition, which was 1313.94 ppm and 698.03 ppm, respectively. Sulfur compound in liquid was mainly found in the form of sulfate and its concentration decreased with increasing temperature.

AB - In order to study the transformation and distribution of sulfur element during supercritical water gasification (SCWG) of sewage sludge, sulfur contained products in different phase were detected in batch reactor. The XPS analysis showed that organic sulfur was the main part of sulfur compounds in sewage sludge. On the other hand, inorganic sulfur was dominated by SiS2, and SiS2 was subsequently converted into SiO2 and H2S during SCWG. The increase of temperature promoted H2S and SO2 yield but reduced their concentration. The addition of KOH could reduce the yield and concentration of H2S and SO2. The minimum concentration of H2S and SO2 was observed at 450 °C with KOH addition, which was 1313.94 ppm and 698.03 ppm, respectively. Sulfur compound in liquid was mainly found in the form of sulfate and its concentration decreased with increasing temperature.

KW - KOH

KW - Sludge

KW - Sulfur

KW - Supercritical water gasification

KW - Syngas

UR - https://www.scopus.com/pages/publications/85100030596

U2 - 10.1016/j.joei.2021.01.002

DO - 10.1016/j.joei.2021.01.002

M3 - Article

AN - SCOPUS:85100030596

SN - 1743-9671

VL - 95

SP - 61

EP - 68

JO - Journal of the Energy Institute

JF - Journal of the Energy Institute

ER -

Sulfur conversion and distribution during supercritical water gasification of sewage sludge

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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