Increased SO2 removal with the addition of alkali metals and chromium to calcium-based sorbents

Slaughter, D.M.; Chen, S.L.; Seeker, W.R.; Pershing, David W.; Kirchgessner, David A.

doi:10.1016/s0082-0784(89)80126-2

Cited by 9 publications

(10 citation statements)

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“…Experimental data used for comparison with modeling predictions were obtained in three combustion facilities: 20 kW Controlled Temperature Tower (CTT), 300 kW Boiler Simulator Facility (BSF), and 3 MW Tower Furnace (TF), which were described in more detail elsewhere [23,24]. Data of Kolb et al [25] and Mereb and Wendt [26,27] were also used for model validation.…”

Section: Methodsmentioning

confidence: 99%

Second Generation Advanced Reburning for High Efficiency NOx Control

Vladimir¹,

Maly²,

Lissianski³

2000

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Section: Methodsmentioning

confidence: 99%

Second Generation Advanced Reburning for High Efficiency NOx Control

Vladimir¹,

Maly²,

Lissianski³

2000

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“…Alkali and transitional metal compounds such as NaCl, FeCl 3 , and Cr 2 O 3 can act as catalysts, accelerating CaO sulfation reactions during combustion at temperatures below 1200°C [35][36][37].…”

Section: So 2 Emissionsmentioning

confidence: 99%

Producing Effective and Clean Coke for Household Combustion Activities to Reduce Gaseous Pollutant Emissions

Liu

Yang

et al. 2019

Journal of Chemistry

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Nowadays, the gaseous pollutant emissions, including particulate matter (PM), sulfur dioxide (SO2), and nitrogen oxide (NOx) from household coal combustion, cause great threat to environment and public health by contributing to severe haze in China. Particularly, a clean coke free of the major pollutants precursors (sulfur and nitrogen compounds) by sulfur fixation and denitrification has been deemed as an effective strategy to reducing pollutants. In this paper, a preprocessed coke was prepared by co-pyrolysis of high-sulfur coal with the assistance of calcium-based and iron-based complexes at high temperature. The results show that high-temperature co-pyrolysis could remove the volatile compounds that are major precursors for the formation of gaseous pollutants from the raw coal. During the coking process, the sulfur can be removed by being fixed in the form of CaS in presence of a Ca-based complex, which could be beneficial for the CaSO4 during the coke combustion. The volatile nitrogen is transferred to the gas phase with the addition of Fe-based complexes, which effectively reduce the residual nitrogen in coke. As a result, Ca-based additives captured the released SO2 and formed CaSO4 during the combustion process. In addition, in the presence of Fe-based complexes, both char and CO react with NOx to form N2, which leads to a reduction in NOx emissions during combustion. Additionally, the replacement of current residential coal with a new type of clean coke is a facile method for reducing gaseous pollutant emissions from household activities to protect the atmospheric environment. The average emission factors (EFs) of PM, SO2, and NOx for the prepared clean coke were small during combustion and were much lower than the EFs of the tested raw coal, semicoke, and briquettes.

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“…Less pronounced morphological effects have been noted with other promoters, particUlarly the alkali metals, and with dispersants and surfactants. Slaughter et al 25 reported that the use of alkali metals as promoters of furnace S02 capture produced large cracks on the surfaces of sorbent particles, along with a reduction in particle size. They speculated that the presence of the alkali metal in the CaO matrix induced a chemical sintering that closed the smaller pores, while differences in the local sintering rates between sodium-enriched and unpromoted CaO opened larger cracks and caused some fragmentation.…”

Section: Effect Of Hightemperature Sorbent Injection On Particle Mormentioning

confidence: 99%

Effects of Sorbent Injection on Particulate Properties: Part II. High-Temperature Sorbent Injection

Dahlin

Bush

1993

Air & Waste

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Copyright 1993. Air & Waste Management Association the effects of the sorbent injection process on the downstream particulate collector (usually an electrostatic precipitator or a baghouse). An evaluation of these effects requires an nnderstanding of how the sorbent injection process alters particulate properties. This article presents a review of information that is known about the effects of high-temperature sorbent injection processes on the properties of particles that affect their collection in electrostatic precipitators (ESPs) and baghouses. Results from both limestone and hydrated lime injection are discussed. Since several studies have made use of additives to enhance the reactivity of the sorbent with S02, the effects of the additives on particulate properties are also addressed. Since downstream humidification of the flue gas has also been used in conjunction with furnace sorbent injection (both to enhance S02 removal and reduce resistivity), the effects of humidification on particulate properties are also discussed.

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Increased SO2 removal with the addition of alkali metals and chromium to calcium-based sorbents

Cited by 9 publications

References 1 publication

Second Generation Advanced Reburning for High Efficiency NOx Control

Second Generation Advanced Reburning for High Efficiency NOx Control

Producing Effective and Clean Coke for Household Combustion Activities to Reduce Gaseous Pollutant Emissions

Effects of Sorbent Injection on Particulate Properties: Part II. High-Temperature Sorbent Injection

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