Effect of fine solid particles on gas-liquid mass transfer rate in a slurry reactor

Erdogan Alper; S. Ozturk

doi:10.1080/00986448608911403

Effect of fine solid particles on gas-liquid mass transfer rate in a slurry reactor

Erdogan Alper
, S. Ozturk

King Fahd University of Petroleum & Minerals

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

33 Scopus citations

Abstract

The influence of suspended fine particles of differing adsorbing capacity (activated carbon, avicell cellulose, Si0₂and molecular sieves) on the liquid-film mass transfer coefficient k₁was examined experimentally in a stirred cell of well-defined gas-liquid interfacial area by chemical methods. The greatest effect on k_Lwas observed with the activated carbon (about a threefold increase). An addition of glycerine in excess of 2.5 x 10^-3k mol/m³ which was adsorbed on the particles preferentially, removed this increase in k_Ltotally. Amongst other particles, only avicell cellulose showed measureable effects. The increase in k_Lvalues was inversely proportional to the temperature and the stirring speed, and the particle loading was found to be immaterial after a certain value. When the reaction rate increased (hence, when the thickness of dissolved gas-rich layer decreased) by gradual addition of a homogeneous catalyst (i.e. Co⁺⁺for sulphite oxidation), the effect of particles on k_Ldecreased and eventually it disappeared.

Original language	English
Pages (from-to)	147-158
Number of pages	12
Journal	Chemical Engineering Communications
Volume	46
Issue number	1-3
DOIs	https://doi.org/10.1080/00986448608911403
State	Published - Jul 1986

Bibliographical note

Funding Information:
One of the authors (E.A.) gratefully acknowledges the financial support of the University of Petroleum & Minerals, Dhahran, Saudi Arabia.

Keywords

Adsorption
Gas absorption
Liquid-film mass transfer coefficient
Slurry reactor

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering

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10.1080/00986448608911403

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title = "Effect of fine solid particles on gas-liquid mass transfer rate in a slurry reactor",

abstract = "The influence of suspended fine particles of differing adsorbing capacity (activated carbon, avicell cellulose, Si02and molecular sieves) on the liquid-film mass transfer coefficient k1was examined experimentally in a stirred cell of well-defined gas-liquid interfacial area by chemical methods. The greatest effect on kLwas observed with the activated carbon (about a threefold increase). An addition of glycerine in excess of 2.5 x 10-3k mol/m3 which was adsorbed on the particles preferentially, removed this increase in kLtotally. Amongst other particles, only avicell cellulose showed measureable effects. The increase in kLvalues was inversely proportional to the temperature and the stirring speed, and the particle loading was found to be immaterial after a certain value. When the reaction rate increased (hence, when the thickness of dissolved gas-rich layer decreased) by gradual addition of a homogeneous catalyst (i.e. Co++for sulphite oxidation), the effect of particles on kLdecreased and eventually it disappeared.",

keywords = "Adsorption, Gas absorption, Liquid-film mass transfer coefficient, Slurry reactor",

author = "Erdogan Alper and S. Ozturk",

note = "Funding Information: One of the authors (E.A.) gratefully acknowledges the financial support of the University of Petroleum \& Minerals, Dhahran, Saudi Arabia.",

year = "1986",

month = jul,

doi = "10.1080/00986448608911403",

language = "English",

volume = "46",

pages = "147--158",

journal = "Chemical Engineering Communications",

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T1 - Effect of fine solid particles on gas-liquid mass transfer rate in a slurry reactor

AU - Alper, Erdogan

AU - Ozturk, S.

N1 - Funding Information: One of the authors (E.A.) gratefully acknowledges the financial support of the University of Petroleum & Minerals, Dhahran, Saudi Arabia.

PY - 1986/7

Y1 - 1986/7

N2 - The influence of suspended fine particles of differing adsorbing capacity (activated carbon, avicell cellulose, Si02and molecular sieves) on the liquid-film mass transfer coefficient k1was examined experimentally in a stirred cell of well-defined gas-liquid interfacial area by chemical methods. The greatest effect on kLwas observed with the activated carbon (about a threefold increase). An addition of glycerine in excess of 2.5 x 10-3k mol/m3 which was adsorbed on the particles preferentially, removed this increase in kLtotally. Amongst other particles, only avicell cellulose showed measureable effects. The increase in kLvalues was inversely proportional to the temperature and the stirring speed, and the particle loading was found to be immaterial after a certain value. When the reaction rate increased (hence, when the thickness of dissolved gas-rich layer decreased) by gradual addition of a homogeneous catalyst (i.e. Co++for sulphite oxidation), the effect of particles on kLdecreased and eventually it disappeared.

AB - The influence of suspended fine particles of differing adsorbing capacity (activated carbon, avicell cellulose, Si02and molecular sieves) on the liquid-film mass transfer coefficient k1was examined experimentally in a stirred cell of well-defined gas-liquid interfacial area by chemical methods. The greatest effect on kLwas observed with the activated carbon (about a threefold increase). An addition of glycerine in excess of 2.5 x 10-3k mol/m3 which was adsorbed on the particles preferentially, removed this increase in kLtotally. Amongst other particles, only avicell cellulose showed measureable effects. The increase in kLvalues was inversely proportional to the temperature and the stirring speed, and the particle loading was found to be immaterial after a certain value. When the reaction rate increased (hence, when the thickness of dissolved gas-rich layer decreased) by gradual addition of a homogeneous catalyst (i.e. Co++for sulphite oxidation), the effect of particles on kLdecreased and eventually it disappeared.

KW - Adsorption

KW - Gas absorption

KW - Liquid-film mass transfer coefficient

KW - Slurry reactor

UR - https://www.scopus.com/pages/publications/0022442457

U2 - 10.1080/00986448608911403

DO - 10.1080/00986448608911403

M3 - Article

AN - SCOPUS:0022442457

SN - 0098-6445

VL - 46

SP - 147

EP - 158

JO - Chemical Engineering Communications

JF - Chemical Engineering Communications

IS - 1-3

ER -

Effect of fine solid particles on gas-liquid mass transfer rate in a slurry reactor

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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