Influence of ionic liquid pretreatment on coal desulfurization

Combining ionic liquid pretreatment with H 2 O 2 oxidation desulfurization to remove sulfur from coal is a very valuable subject. In this work, three different types of ionic liquid were used to pretreat coal samples, and then the pretreated coal was treated by 30% H 2 O 2 with the assistance of ult...

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Published inInternational journal of coal preparation and utilization Vol. 42; no. 9; pp. 2613 - 2634
Main Authors Sun, Gongcheng, Li, Mei, Cheng, Xueyun, Ding, Ning, Yue, Jingsong
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 02.09.2022
Taylor & Francis Ltd
Subjects
Coal
Contact angle
Desulfurization
Desulfurizing
Functional groups
Hydrogen peroxide
Ionic liquids
ionic liquids recovery
Ions
Oxidation
oxidation desulfurization
Pore size
Pretreatment
Recovery
Sulfur
Swelling
Ultrasonic imaging
Ultrasound
Wettability
Online AccessGet full text
ISSN1939-2699
1939-2702
DOI10.1080/19392699.2020.1868446

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Abstract Combining ionic liquid pretreatment with H 2 O 2 oxidation desulfurization to remove sulfur from coal is a very valuable subject. In this work, three different types of ionic liquid were used to pretreat coal samples, and then the pretreated coal was treated by 30% H 2 O 2 with the assistance of ultrasound, which is compared with the desulfurization effect of raw coal with the same method. The swelling characteristics and contact angle changes of coal samples before and after pretreatment were measured, and the samples before and after pretreatment were characterized by BET, SEM, TG. And the form sulfur changes of coal samples before and after being treated were determined by chemical methods, FT-IR and XPS were used to determine the sulfur-containing functional groups and the sulfur morphological change of coal samples before and after treatment, and different types of ionic liquid recovery experiments were also carried out. The results show that the ionic liquid pretreatment had a swelling effect on the coal samples and improved the wettability of the coal samples. The ionic liquid pretreatment increased the specific surface area and average pore size of the coal sample, as well as the coal particle gap increases, cracks developed on the coal surface. The characterization of the desulfurized samples find that the desulfurization rate of the ionic liquid pretreated coal treated by H 2 O 2 with the assistance of ultrasound was significantly increased compared to the raw coal under the same conditions. Ionic liquid pretreatment promoted coal desulfurization, and more sulfur in coal was removed. The ionic liquid recovery experiments reveal that ionic liquid could be stably recovered, the FT-IR characterization experiment of ionic liquids indicate that the recovered ionic liquid had no obvious change of structural properties compared to the fresh ionic liquid.
AbstractList Combining ionic liquid pretreatment with H2O2 oxidation desulfurization to remove sulfur from coal is a very valuable subject. In this work, three different types of ionic liquid were used to pretreat coal samples, and then the pretreated coal was treated by 30% H2O2 with the assistance of ultrasound, which is compared with the desulfurization effect of raw coal with the same method. The swelling characteristics and contact angle changes of coal samples before and after pretreatment were measured, and the samples before and after pretreatment were characterized by BET, SEM, TG. And the form sulfur changes of coal samples before and after being treated were determined by chemical methods, FT-IR and XPS were used to determine the sulfur-containing functional groups and the sulfur morphological change of coal samples before and after treatment, and different types of ionic liquid recovery experiments were also carried out. The results show that the ionic liquid pretreatment had a swelling effect on the coal samples and improved the wettability of the coal samples. The ionic liquid pretreatment increased the specific surface area and average pore size of the coal sample, as well as the coal particle gap increases, cracks developed on the coal surface. The characterization of the desulfurized samples find that the desulfurization rate of the ionic liquid pretreated coal treated by H2O2 with the assistance of ultrasound was significantly increased compared to the raw coal under the same conditions. Ionic liquid pretreatment promoted coal desulfurization, and more sulfur in coal was removed. The ionic liquid recovery experiments reveal that ionic liquid could be stably recovered, the FT-IR characterization experiment of ionic liquids indicate that the recovered ionic liquid had no obvious change of structural properties compared to the fresh ionic liquid.
Combining ionic liquid pretreatment with H 2 O 2 oxidation desulfurization to remove sulfur from coal is a very valuable subject. In this work, three different types of ionic liquid were used to pretreat coal samples, and then the pretreated coal was treated by 30% H 2 O 2 with the assistance of ultrasound, which is compared with the desulfurization effect of raw coal with the same method. The swelling characteristics and contact angle changes of coal samples before and after pretreatment were measured, and the samples before and after pretreatment were characterized by BET, SEM, TG. And the form sulfur changes of coal samples before and after being treated were determined by chemical methods, FT-IR and XPS were used to determine the sulfur-containing functional groups and the sulfur morphological change of coal samples before and after treatment, and different types of ionic liquid recovery experiments were also carried out. The results show that the ionic liquid pretreatment had a swelling effect on the coal samples and improved the wettability of the coal samples. The ionic liquid pretreatment increased the specific surface area and average pore size of the coal sample, as well as the coal particle gap increases, cracks developed on the coal surface. The characterization of the desulfurized samples find that the desulfurization rate of the ionic liquid pretreated coal treated by H 2 O 2 with the assistance of ultrasound was significantly increased compared to the raw coal under the same conditions. Ionic liquid pretreatment promoted coal desulfurization, and more sulfur in coal was removed. The ionic liquid recovery experiments reveal that ionic liquid could be stably recovered, the FT-IR characterization experiment of ionic liquids indicate that the recovered ionic liquid had no obvious change of structural properties compared to the fresh ionic liquid.
Author Li, Mei
Cheng, Xueyun
Yue, Jingsong
Ding, Ning
Sun, Gongcheng
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Snippet Combining ionic liquid pretreatment with H 2 O 2 oxidation desulfurization to remove sulfur from coal is a very valuable subject. In this work, three different...
Combining ionic liquid pretreatment with H2O2 oxidation desulfurization to remove sulfur from coal is a very valuable subject. In this work, three different...
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SubjectTerms Coal
Contact angle
Desulfurization
Desulfurizing
Functional groups
Hydrogen peroxide
Ionic liquids
ionic liquids recovery
Ions
Oxidation
oxidation desulfurization
Pore size
Pretreatment
Recovery
Sulfur
Swelling
Ultrasonic imaging
Ultrasound
Wettability
Title Influence of ionic liquid pretreatment on coal desulfurization
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