Journal of Supercritical Fluids, volume 164, pages 104933
Effect of sodium carbonate on supercritical water gasification and oxidation of sludge-lignin at continuous counter-feed of the reagents
Publication type: Journal Article
Publication date: 2020-10-01
Journal:
Journal of Supercritical Fluids
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor: 3.9
ISSN: 08968446
Physical and Theoretical Chemistry
General Chemical Engineering
Condensed Matter Physics
Abstract
The article presents the research results of supercritical water (SCW) gasification and oxidation of watered waste of pulp and paper manufacturing (sludge-lignin), aimed at solving the problem of its environmentally friendly utilization. The experiments were performed at continuous counter-feed of sludge-lignin (without and with the addition of Na2CO3) and SCW or SCW/O2 fluid under temperature gradient along the axis of a vertically arranged reactor (425 °C at the top, and 600 °C at the bottom) at a pressure of 30 MPa. To get the temperature dependencies of the yield of the product, sludge-lignin gasification was also carried out by pumping water vapor and SCW through its bed at the uniform (1.5 °C/min) heating of the reactor up to 650 °C. In SCW gasification products, along with H2, CO, CO2, and hydrocarbons, toxic S-, Cl-, N-, and O-containing substances were detected. The yield of volatile hydrocarbons and heteroatomic substances during SCW gasification in counter-current flows was greater than at pumping SCW through a sludge-lignin bed. It was revealed that the addition of Na2CO3 to the sludge-lignin at the counter-feed of SCW leads to an increase in the yield of combustible gases, as well as to a decrease in the yield of CO, phenols, and carbonized residue. The addition of Na2CO3 to the sludge-lignin intensifies the oxidation of its organic components in SCW/O2 fluid. It was established that the bulk of hydrochloric and sulfuric acids resulted from the oxidation of Cl- and S-containing organic components of sludge-lignin in SCW/O2 fluid are neutralized by sodium carbonate with the formation of NaCl and Na4(CO3)0.61(SO4)1.39, respectively.
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Citations by publishers
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6 publications, 75%
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Pleiades Publishing
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- We do not take into account publications that without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.
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Fedyaeva O. N. et al. Effect of sodium carbonate on supercritical water gasification and oxidation of sludge-lignin at continuous counter-feed of the reagents // Journal of Supercritical Fluids. 2020. Vol. 164. p. 104933.
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Fedyaeva O. N., Vostrikov A. A., Shishkin A. V., Dubov D. Y., Sokol M. Y. Effect of sodium carbonate on supercritical water gasification and oxidation of sludge-lignin at continuous counter-feed of the reagents // Journal of Supercritical Fluids. 2020. Vol. 164. p. 104933.
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TY - JOUR
DO - 10.1016/j.supflu.2020.104933
UR - https://doi.org/10.1016%2Fj.supflu.2020.104933
TI - Effect of sodium carbonate on supercritical water gasification and oxidation of sludge-lignin at continuous counter-feed of the reagents
T2 - Journal of Supercritical Fluids
AU - Fedyaeva, Oxana N
AU - Vostrikov, A A
AU - Shishkin, Andrey V
AU - Dubov, Dmitry Y
AU - Sokol, Mikhail Y
PY - 2020
DA - 2020/10/01 00:00:00
PB - Elsevier
SP - 104933
VL - 164
SN - 0896-8446
ER -
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@article{2020_Fedyaeva,
author = {Oxana N Fedyaeva and A A Vostrikov and Andrey V Shishkin and Dmitry Y Dubov and Mikhail Y Sokol},
title = {Effect of sodium carbonate on supercritical water gasification and oxidation of sludge-lignin at continuous counter-feed of the reagents},
journal = {Journal of Supercritical Fluids},
year = {2020},
volume = {164},
publisher = {Elsevier},
month = {oct},
url = {https://doi.org/10.1016%2Fj.supflu.2020.104933},
pages = {104933},
doi = {10.1016/j.supflu.2020.104933}
}