Surface chemical control of ultra-fine coal to improve dewatering

J. G. Groppo; B. K. Parekh

doi:10.1080/07349349608905261

Surface chemical control of ultra-fine coal to improve dewatering

J. G. Groppo, B. K. Parekh

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

7 Scopus citations

Abstract

Lowering of filter cake moisture of ultra-fine (d₃₀ ≈ 25 μm) coal to a 20 percent level using the conventional vacuum filtration could be achieved using a combination of metal ions and surfactants. Pretreating coal slurry with about 0.2 Kg/ton of a surfactant and 50 ppm of copper or 10 ppm of aluminum ions provided filter cake containing 22.8 percent moisture. The towering of moisture is explained due to formation of hydrophobic micro-aggregates which facilitates dewatering.

Original language	English
Pages (from-to)	103-116
Number of pages	14
Journal	Coal Preparation
Volume	17
Issue number	1-2
DOIs	https://doi.org/10.1080/07349349608905261
State	Published - 1996

Bibliographical note

Funding Information:
Financial support for the study was provided by Illinois Department of Energy through the Illinois Coal Development Board and the Illinois Clean Coal Institute and the United States Department of Energy.

Keywords

Flocculation
Metal ions
Micro-aggregates
Surfactants
Vacuum filtration

ASJC Scopus subject areas

Fuel Technology
Geotechnical Engineering and Engineering Geology

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10.1080/07349349608905261

Cite this

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abstract = "Lowering of filter cake moisture of ultra-fine (d30 ≈ 25 μm) coal to a 20 percent level using the conventional vacuum filtration could be achieved using a combination of metal ions and surfactants. Pretreating coal slurry with about 0.2 Kg/ton of a surfactant and 50 ppm of copper or 10 ppm of aluminum ions provided filter cake containing 22.8 percent moisture. The towering of moisture is explained due to formation of hydrophobic micro-aggregates which facilitates dewatering.",

keywords = "Flocculation, Metal ions, Micro-aggregates, Surfactants, Vacuum filtration",

author = "Groppo, {J. G.} and Parekh, {B. K.}",

note = "Funding Information: Financial support for the study was provided by Illinois Department of Energy through the Illinois Coal Development Board and the Illinois Clean Coal Institute and the United States Department of Energy.",

year = "1996",

doi = "10.1080/07349349608905261",

language = "English",

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T1 - Surface chemical control of ultra-fine coal to improve dewatering

AU - Groppo, J. G.

AU - Parekh, B. K.

N1 - Funding Information: Financial support for the study was provided by Illinois Department of Energy through the Illinois Coal Development Board and the Illinois Clean Coal Institute and the United States Department of Energy.

PY - 1996

Y1 - 1996

N2 - Lowering of filter cake moisture of ultra-fine (d30 ≈ 25 μm) coal to a 20 percent level using the conventional vacuum filtration could be achieved using a combination of metal ions and surfactants. Pretreating coal slurry with about 0.2 Kg/ton of a surfactant and 50 ppm of copper or 10 ppm of aluminum ions provided filter cake containing 22.8 percent moisture. The towering of moisture is explained due to formation of hydrophobic micro-aggregates which facilitates dewatering.

AB - Lowering of filter cake moisture of ultra-fine (d30 ≈ 25 μm) coal to a 20 percent level using the conventional vacuum filtration could be achieved using a combination of metal ions and surfactants. Pretreating coal slurry with about 0.2 Kg/ton of a surfactant and 50 ppm of copper or 10 ppm of aluminum ions provided filter cake containing 22.8 percent moisture. The towering of moisture is explained due to formation of hydrophobic micro-aggregates which facilitates dewatering.

KW - Flocculation

KW - Metal ions

KW - Micro-aggregates

KW - Surfactants

KW - Vacuum filtration

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JO - Coal Preparation

JF - Coal Preparation

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ER -

Surface chemical control of ultra-fine coal to improve dewatering

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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