Effect of a gas–gas-heater on H2SO4 aerosol formation: Implications for mist formation in amine based carbon capture

Mertens, Jan; Bruns, Rainer; Schallert, B.; Faniel, Nathalie; Khakharia, Purvil; Albrecht, W.L.; Goetheer, Earl; Blondeau, Julien; Schaber, Karlheinz

doi:10.1016/j.ijggc.2015.06.013

Cited by 24 publications

(7 citation statements)

References 17 publications

(24 reference statements)

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“…In the DAD 100, heated (60°C) dilution air is introduced as a layer around the flue gas sample resulting in low particle losses, as claimed by the manufacturer (Dekati, 2010). The DAD 100 was used in previous research to dilute flue gases from coal combustion (Mertens et al, 2014(Mertens et al, , 2015. The DR is calculated with the volumetric flow rate of the dilution air and the diluted flue gas sample.…”

Section: Sampling Systemsmentioning

confidence: 99%

Influence of the Dilution System and Electrical Low Pressure Impactor Performance on Particulate Emission Measurements from a Medium-scale Biomass Boiler

Cornette

Coppieters

Desagher³

et al. 2020

Aerosol Air Qual. Res.

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The accurate monitoring of particulate emissions from medium-scale, decentralized biomass combustion units is a major challenge for the deployment of this technology in the framework of the current energy transition. More specifically, the experimental characterization of the size of the emitted particles, i.e., using impactors, is still subject to discussions about the impact of the methodology on the measurement results. To meet these challenges, particulate emissions from a mediumscale biomass boiler (4.5 MW th ) were measured with the Electrical Low Pressure Impactor (ELPI+) using two different dilution systems-one containing a single stage and the other, dual stages-to examine the effect of dilution and the performance of the ELPI+. No statistically significant correlation was found with either system between the dilution ratio (DR) and the total particle number concentration, N tot , or between the DR and the mass concentration, m tot . However, a significant positive correlation was observed with both systems between the DR and the concentration of particles with a diameter, D p , below 0.01 µm due to measurement artefacts. With the one-stage dilution system, the condensation appeared to be enhanced when the DR was reduced. When the ELPI+ impactor was not overloaded, the number concentrations of the N <0.01 and N 0.01-0.1 size fractions decreased over time due to the premature measurement of particles. However, when the impactor was overloaded, the N <0.01 concentration was overestimated, whereas the N 0.01-0.1 and N 0.1-1 concentrations were underestimated, due to the change in the cut-off diameter.

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Section: Sampling Systemsmentioning

confidence: 99%

Influence of the Dilution System and Electrical Low Pressure Impactor Performance on Particulate Emission Measurements from a Medium-scale Biomass Boiler

Cornette

Coppieters

Desagher³

et al. 2020

Aerosol Air Qual. Res.

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“…30 Reducing gas temperature by using a gas−gas−heater (GGH) also effectively prevents amine mist formation in the subsequent amine-based PCCC process. 31 Our previous work showed that, when combining a heat exchanger with a novel WESP, SAA concentration can be reduced to an emission level of <1 mg m −3 . 32 The above-mentioned work shows that SAA growth is of vital importance in improving the SAA removal efficiency.…”

Section: ■ Introductionmentioning

confidence: 99%

“…For instance, adding water vapor in a limestone–gypsum desulfurization tower can improve SAA removal efficiency from 30%–40% to above 60% . Reducing gas temperature by using a gas–gas–heater (GGH) also effectively prevents amine mist formation in the subsequent amine-based PCCC process . Our previous work showed that, when combining a heat exchanger with a novel WESP, SAA concentration can be reduced to an emission level of <1 mg m –3 .…”

Section: Introductionmentioning

confidence: 99%

Fast Evolution of Sulfuric Acid Aerosol Activated by External Fields for Enhanced Emission Control

Yang

Zheng

et al. 2020

Environ. Sci. Technol.

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Sulfuric acid aerosol (SAA) can considerably deteriorate air visibility, which poses a threat to human health. Pretreatment methods that enlarge SAA sizes are crucial to enhanced emission control from industrials. This study provides an insight into SAA growth in terms of aerosol dynamics simulation and growth experiments under simulated flue gas conditions. Results show that SAA growth dynamics are dominated by coagulation and condensation mechanisms for small and large aerosols, respectively. The two mechanisms are coupled mainly in SAA sizes smaller than 0.05 μm. A large amount of time was allotted for the SAA distribution to grow into an approximately log-normal form without the use of any activation methods. Cooling gas and corona discharge can both enhance SAA growth. Cooling gas is in charge of condensation, whereas corona discharge mainly acts on coagulation. They exhibited 14.3% and 12.3% increases in mean diameter and 12.3% and 69.1% decreases in number concentration. In contrast, adding vapor led to a 1.58% decrease in mean diameter and a 9.4% increase in number concentration. Findings suggest that combining cooling gas and corona discharge to simultaneously promote coagulation and condensation and reduce SAA emission from humid flue gas is possible.

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“…However, given our limited current knowledge, the mechanism of particle growth and the law of particle size distribution in flue gas are still unclear. 30,31 The precise regulation method of particle growth still needs further exploration. At present, tremendous applied research have focused on the removal of SO 3 ; 26,32,33 however, most studies focused on the formation and removal of singlecomponent condensable particles (SO 3 /sulfuric acid aerosol).…”

Section: Introductionmentioning

confidence: 99%

“…The regulation of external field is an effective method for enhancing the growth and agglomeration of particles; this process includes cooling and humidifying, , electrocoagulation, acoustic agglomeration, and chemical agglomeration, etc. However, given our limited current knowledge, the mechanism of particle growth and the law of particle size distribution in flue gas are still unclear. , The precise regulation method of particle growth still needs further exploration. At present, tremendous applied research have focused on the removal of SO 3 ; ,, however, most studies focused on the formation and removal of single-component condensable particles (SO 3 /sulfuric acid aerosol).…”

Section: Introductionmentioning

confidence: 99%

Evolution of Condensable Fine Particle Size Distribution in Simulated Flue Gas by External Regulation for Growth Enhancement

Zheng

Shen

et al. 2020

Environ. Sci. Technol.

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Condensation fine particles (CFPs) from coal-fired flue gas harm humans and the environment after being emitted into the atmosphere. Given their small size (<0.1 μm), difficulty arises in efficiently removing CFPs by wet electrostatic precipitators and mist eliminators. In this work, a laboratory apparatus was used to study the CFP growth under simulated power plant conditions. Four methods were independently investigated to increase the particle size: addition of ammonia, addition of fly ash, decreasing temperature, and applying an electrical discharge. Results demonstrated that the CFP size distribution possessed a unimodal structure with peak at 0.05 μm. At increased ammonia concentration from 10 to 30 ppm, the peak of growth factor shifted rightward and increased from 1.21 to 1.35 and the range of growth factor >1 was significantly broadened due to joint action of multiple mechanisms. Fly ash acted as the core, and CFPs adhered to the ash surface when forming ash−salt droplets. Cooling flue gas could also enhance the CFP growth due to vapor condensation. At decreased temperature from 45 to 30 °C, the median diameter of CFPs increased by 15%. Finally, the growth and agglomeration of CFPs can be further enhanced when an external electrical field was utilized. The size range of growth factor >1 can be broadened, and the peak growth factor significantly increased at 8 kV applied voltage. The research findings provide valuable guidance for effectively improving the CFP removal efficiency by external regulation for growth enhancement.

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Effect of a gas–gas-heater on H2SO4 aerosol formation: Implications for mist formation in amine based carbon capture

Cited by 24 publications

References 17 publications

Influence of the Dilution System and Electrical Low Pressure Impactor Performance on Particulate Emission Measurements from a Medium-scale Biomass Boiler

Influence of the Dilution System and Electrical Low Pressure Impactor Performance on Particulate Emission Measurements from a Medium-scale Biomass Boiler

Fast Evolution of Sulfuric Acid Aerosol Activated by External Fields for Enhanced Emission Control

Evolution of Condensable Fine Particle Size Distribution in Simulated Flue Gas by External Regulation for Growth Enhancement

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