Migration of nitrogen and phosphorus during supercritical water gasification of sewage sludge: Effect of alkaline additives

Jintao Cui; Xiaoqiang Wen; Feng Chen; Mi Yan; Dwi Hantoko

doi:10.1016/j.fuproc.2023.107727

Migration of nitrogen and phosphorus during supercritical water gasification of sewage sludge: Effect of alkaline additives

Jintao Cui
, Xiaoqiang Wen
, Feng Chen
, Mi Yan^*
, Dwi Hantoko

^*Corresponding author for this work

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

7 Scopus citations

Abstract

The effect of alkaline additives (KOH, NaOH, Ca(OH)₂, NaCO₃ and K₂CO₃) on syngas yield, phosphorus (P) and nitrogen (N) migration during supercritical water gasification (SCWG) of sewage sludge were investigated. The alkaline additives elevated the syngas yield by affecting the steam reforming reaction, water-gas shift reaction and methanation reaction. In addition, alkaline additives enriched P and N into the aqueous phase by promoting the dissolution of phosphide (Al[sbnd]P, Ca[sbnd]P, and Fe[sbnd]P) and the decomposition of nitrogenous organic matter and hydrolysis of nitrile in sludge. The results showed that K₂CO₃ exhibited the best catalytic effect in these five alkaline additives. In the presence of 0.5 g K₂CO₃ (5%), the syngas yield was up to 18.2 mol/kg, as well as, 78.2% of P and 80.2% of N were dissolved in the aqueous phase. Moreover, the effects of different K₂CO₃ additions (5%–11%) on the syngas yield and the migration of N and P were discussed.

Original language	English
Article number	107727
Journal	Fuel Processing Technology
Volume	245
DOIs	https://doi.org/10.1016/j.fuproc.2023.107727
State	Published - 15 Jun 2023
Externally published	Yes

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Publisher Copyright:
© 2023 Elsevier B.V.

Keywords

Alkaline additives
Migration
Nitrogen
Phosphorus
Supercritical water gasification

ASJC Scopus subject areas

General Chemical Engineering
Fuel Technology
Energy Engineering and Power Technology

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10.1016/j.fuproc.2023.107727

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@article{0148995d7dc94e8895f5741f6e2d38c0,

title = "Migration of nitrogen and phosphorus during supercritical water gasification of sewage sludge: Effect of alkaline additives",

abstract = "The effect of alkaline additives (KOH, NaOH, Ca(OH)2, NaCO3 and K2CO3) on syngas yield, phosphorus (P) and nitrogen (N) migration during supercritical water gasification (SCWG) of sewage sludge were investigated. The alkaline additives elevated the syngas yield by affecting the steam reforming reaction, water-gas shift reaction and methanation reaction. In addition, alkaline additives enriched P and N into the aqueous phase by promoting the dissolution of phosphide (Al[sbnd]P, Ca[sbnd]P, and Fe[sbnd]P) and the decomposition of nitrogenous organic matter and hydrolysis of nitrile in sludge. The results showed that K2CO3 exhibited the best catalytic effect in these five alkaline additives. In the presence of 0.5 g K2CO3 (5\%), the syngas yield was up to 18.2 mol/kg, as well as, 78.2\% of P and 80.2\% of N were dissolved in the aqueous phase. Moreover, the effects of different K2CO3 additions (5\%–11\%) on the syngas yield and the migration of N and P were discussed.",

keywords = "Alkaline additives, Migration, Nitrogen, Phosphorus, Supercritical water gasification",

author = "Jintao Cui and Xiaoqiang Wen and Feng Chen and Mi Yan and Dwi Hantoko",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier B.V.",

year = "2023",

month = jun,

day = "15",

doi = "10.1016/j.fuproc.2023.107727",

language = "English",

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journal = "Fuel Processing Technology",

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TY - JOUR

T1 - Migration of nitrogen and phosphorus during supercritical water gasification of sewage sludge

T2 - Effect of alkaline additives

AU - Cui, Jintao

AU - Wen, Xiaoqiang

AU - Chen, Feng

AU - Yan, Mi

AU - Hantoko, Dwi

PY - 2023/6/15

Y1 - 2023/6/15

N2 - The effect of alkaline additives (KOH, NaOH, Ca(OH)2, NaCO3 and K2CO3) on syngas yield, phosphorus (P) and nitrogen (N) migration during supercritical water gasification (SCWG) of sewage sludge were investigated. The alkaline additives elevated the syngas yield by affecting the steam reforming reaction, water-gas shift reaction and methanation reaction. In addition, alkaline additives enriched P and N into the aqueous phase by promoting the dissolution of phosphide (Al[sbnd]P, Ca[sbnd]P, and Fe[sbnd]P) and the decomposition of nitrogenous organic matter and hydrolysis of nitrile in sludge. The results showed that K2CO3 exhibited the best catalytic effect in these five alkaline additives. In the presence of 0.5 g K2CO3 (5%), the syngas yield was up to 18.2 mol/kg, as well as, 78.2% of P and 80.2% of N were dissolved in the aqueous phase. Moreover, the effects of different K2CO3 additions (5%–11%) on the syngas yield and the migration of N and P were discussed.

AB - The effect of alkaline additives (KOH, NaOH, Ca(OH)2, NaCO3 and K2CO3) on syngas yield, phosphorus (P) and nitrogen (N) migration during supercritical water gasification (SCWG) of sewage sludge were investigated. The alkaline additives elevated the syngas yield by affecting the steam reforming reaction, water-gas shift reaction and methanation reaction. In addition, alkaline additives enriched P and N into the aqueous phase by promoting the dissolution of phosphide (Al[sbnd]P, Ca[sbnd]P, and Fe[sbnd]P) and the decomposition of nitrogenous organic matter and hydrolysis of nitrile in sludge. The results showed that K2CO3 exhibited the best catalytic effect in these five alkaline additives. In the presence of 0.5 g K2CO3 (5%), the syngas yield was up to 18.2 mol/kg, as well as, 78.2% of P and 80.2% of N were dissolved in the aqueous phase. Moreover, the effects of different K2CO3 additions (5%–11%) on the syngas yield and the migration of N and P were discussed.

KW - Alkaline additives

KW - Migration

KW - Nitrogen

KW - Phosphorus

KW - Supercritical water gasification

UR - https://www.scopus.com/pages/publications/85149888754

U2 - 10.1016/j.fuproc.2023.107727

DO - 10.1016/j.fuproc.2023.107727

M3 - Article

AN - SCOPUS:85149888754

SN - 0378-3820

VL - 245

JO - Fuel Processing Technology

JF - Fuel Processing Technology

M1 - 107727

ER -

Migration of nitrogen and phosphorus during supercritical water gasification of sewage sludge: Effect of alkaline additives

Abstract

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Keywords

ASJC Scopus subject areas

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