Trace elements removal from hot flue gases

Wahab Mojtahedi, Ulla-Maija Mroueh

Research output: Book/ReportReport

Abstract

Granular-bed filtration was investigated theoretically and experimentally with the view to its applicability to gaseous trace element removal at high temperatures. Granular-bed filters have received a great deal of attention recently as an alternative to the more conventional gas cleanup devices such as cyclones, electrostatic precipitators (ESP) and bag-filters. None of these conventional devices is capable of operating efficiently at high temperatures, (800-900 °C) typical of combined cycle power generation plants. Moreover, a sizeable proportion of the volatilised trace metals will exit from the reactor in the vapour phase and these purification devices are not generally designed to remove the gaseous species. In an atmospheric test rig, trace elements of concern were removed in a fixed granular-bed filter at 800-900 °C temperature range using sorbent particles (such as limestone) as the unbonded filter medium. Two configurations of the experimental apparatus were employed to enable an accurate determination of the removal efficiency of various sorbent particles. The results show that volatilised trace elements can be effectively removed from hot flue gases by passing them through a fixed bed of suitably selected solid sorbents. Removal efficiencies of higher than 99 % were achieved with solid sorbent particles in the 0.3-3.0 mm size range, operating at 800-900 °C.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages78
ISBN (Print)951-38-3605-3
Publication statusPublished - 1989
MoE publication typeD4 Published development or research report or study

Publication series

SeriesValtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports
Number663
ISSN0358-5077

Fingerprint

trace element
filter
experimental apparatus
cleanup
power generation
cyclone
range size
trace metal
purification
limestone
flue gas
removal
gas
temperature
particle
test
reactor
solid particle

Keywords

  • flue
  • gases
  • hot gas cleanup
  • trace elements
  • filtration
  • granular bed filters

Cite this

Mojtahedi, W., & Mroueh, U-M. (1989). Trace elements removal from hot flue gases. Espoo: VTT Technical Research Centre of Finland. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, No. 663
Mojtahedi, Wahab ; Mroueh, Ulla-Maija. / Trace elements removal from hot flue gases. Espoo : VTT Technical Research Centre of Finland, 1989. 78 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 663).
@book{c97cbd9b1fa84c578dace29b3edb2733,
title = "Trace elements removal from hot flue gases",
abstract = "Granular-bed filtration was investigated theoretically and experimentally with the view to its applicability to gaseous trace element removal at high temperatures. Granular-bed filters have received a great deal of attention recently as an alternative to the more conventional gas cleanup devices such as cyclones, electrostatic precipitators (ESP) and bag-filters. None of these conventional devices is capable of operating efficiently at high temperatures, (800-900 °C) typical of combined cycle power generation plants. Moreover, a sizeable proportion of the volatilised trace metals will exit from the reactor in the vapour phase and these purification devices are not generally designed to remove the gaseous species. In an atmospheric test rig, trace elements of concern were removed in a fixed granular-bed filter at 800-900 °C temperature range using sorbent particles (such as limestone) as the unbonded filter medium. Two configurations of the experimental apparatus were employed to enable an accurate determination of the removal efficiency of various sorbent particles. The results show that volatilised trace elements can be effectively removed from hot flue gases by passing them through a fixed bed of suitably selected solid sorbents. Removal efficiencies of higher than 99 {\%} were achieved with solid sorbent particles in the 0.3-3.0 mm size range, operating at 800-900 °C.",
keywords = "flue, gases, hot gas cleanup, trace elements, filtration, granular bed filters",
author = "Wahab Mojtahedi and Ulla-Maija Mroueh",
year = "1989",
language = "English",
isbn = "951-38-3605-3",
series = "Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports",
publisher = "VTT Technical Research Centre of Finland",
number = "663",
address = "Finland",

}

Mojtahedi, W & Mroueh, U-M 1989, Trace elements removal from hot flue gases. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, no. 663, VTT Technical Research Centre of Finland, Espoo.

Trace elements removal from hot flue gases. / Mojtahedi, Wahab; Mroueh, Ulla-Maija.

Espoo : VTT Technical Research Centre of Finland, 1989. 78 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 663).

Research output: Book/ReportReport

TY - BOOK

T1 - Trace elements removal from hot flue gases

AU - Mojtahedi, Wahab

AU - Mroueh, Ulla-Maija

PY - 1989

Y1 - 1989

N2 - Granular-bed filtration was investigated theoretically and experimentally with the view to its applicability to gaseous trace element removal at high temperatures. Granular-bed filters have received a great deal of attention recently as an alternative to the more conventional gas cleanup devices such as cyclones, electrostatic precipitators (ESP) and bag-filters. None of these conventional devices is capable of operating efficiently at high temperatures, (800-900 °C) typical of combined cycle power generation plants. Moreover, a sizeable proportion of the volatilised trace metals will exit from the reactor in the vapour phase and these purification devices are not generally designed to remove the gaseous species. In an atmospheric test rig, trace elements of concern were removed in a fixed granular-bed filter at 800-900 °C temperature range using sorbent particles (such as limestone) as the unbonded filter medium. Two configurations of the experimental apparatus were employed to enable an accurate determination of the removal efficiency of various sorbent particles. The results show that volatilised trace elements can be effectively removed from hot flue gases by passing them through a fixed bed of suitably selected solid sorbents. Removal efficiencies of higher than 99 % were achieved with solid sorbent particles in the 0.3-3.0 mm size range, operating at 800-900 °C.

AB - Granular-bed filtration was investigated theoretically and experimentally with the view to its applicability to gaseous trace element removal at high temperatures. Granular-bed filters have received a great deal of attention recently as an alternative to the more conventional gas cleanup devices such as cyclones, electrostatic precipitators (ESP) and bag-filters. None of these conventional devices is capable of operating efficiently at high temperatures, (800-900 °C) typical of combined cycle power generation plants. Moreover, a sizeable proportion of the volatilised trace metals will exit from the reactor in the vapour phase and these purification devices are not generally designed to remove the gaseous species. In an atmospheric test rig, trace elements of concern were removed in a fixed granular-bed filter at 800-900 °C temperature range using sorbent particles (such as limestone) as the unbonded filter medium. Two configurations of the experimental apparatus were employed to enable an accurate determination of the removal efficiency of various sorbent particles. The results show that volatilised trace elements can be effectively removed from hot flue gases by passing them through a fixed bed of suitably selected solid sorbents. Removal efficiencies of higher than 99 % were achieved with solid sorbent particles in the 0.3-3.0 mm size range, operating at 800-900 °C.

KW - flue

KW - gases

KW - hot gas cleanup

KW - trace elements

KW - filtration

KW - granular bed filters

M3 - Report

SN - 951-38-3605-3

T3 - Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports

BT - Trace elements removal from hot flue gases

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Mojtahedi W, Mroueh U-M. Trace elements removal from hot flue gases. Espoo: VTT Technical Research Centre of Finland, 1989. 78 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 663).