Probabilistic Evaluation of Advanced SO<sub>2</sub>/NO<sub>x</sub> Control Technology

Frey, H. Christopher; Rubin, Edward S.

doi:10.1080/10473289.1991.10466954

Cited by 15 publications

(15 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, emissions from power plants can vary over short time periods depending on operating conditions such as efficiency of emission control technology, fuel composition (i.e., halide content of coal which can depend on the mine where the coal was extracted, bituminous vs. subbituminous, etc. ), and combustion temperature (Frey & Rubin, ; Rubin et al, ). Thus, emission ratios may vary over time.…”

Section: Resultsmentioning

confidence: 99%

Airborne Observations of Reactive Inorganic Chlorine and Bromine Species in the Exhaust of Coal‐Fired Power Plants

et al. 2018

View full text Add to dashboard Cite

We present airborne observations of gaseous reactive halogen species (HCl, Cl 2 , ClNO 2 , Br 2 , BrNO 2 , and BrCl), sulfur dioxide (SO 2 ), and nonrefractory fine particulate chloride (pCl) and sulfate (pSO 4 ) in power plant exhaust. Measurements were conducted during the Wintertime INvestigation of Transport, Emissions, and Reactivity campaign in February-March of 2015 aboard the NCAR-NSF C-130 aircraft. Fifty air mass encounters were identified in which SO 2 levels were elevated~5 ppb above ambient background levels and in proximity to operational power plants. Each encounter was attributed to one or more potential emission sources using a simple wind trajectory analysis. In case studies, we compare measured emission ratios to those reported in the 2011 National Emissions Inventory and present evidence of the conversion of HCl emitted from power plants to ClNO 2 . Taking into account possible chemical conversion downwind, there was general agreement between the observed and reported HCl: SO 2 emission ratios. Reactive bromine species (Br 2 , BrNO 2 , and/or BrCl) were detected in the exhaust of some coal-fired power plants, likely related to the absence of wet flue gas desulfurization emission control technology. Levels of bromine species enhanced in some encounters exceeded those expected assuming all of the native bromide in coal was released to the atmosphere, though there was no reported use of bromide salts (as a way to reduce mercury emissions) during Wintertime INvestigation of Transport, Emissions, and Reactivity observations. These measurements represent the first ever in-flight observations of reactive gaseous chlorine and bromine containing compounds present in coal-fired power plant exhaust. LEE ET AL. 11,225Key Points:• Gaseous inorganic chlorine and bromine species were observed in the exhaust of coal-fired power plants during the WINTER flight campaign • We present evidence of the conversion of hydrogen chloride (HCl) emitted from power plants to nitryl chloride (ClNO 2 ) downwind of a source • Observed levels of Br 2 , BrNO 2 , and BrCl in some plumes strongly suggest artificial enhancement of bromide in the coal Supporting Information:• Supporting Information S1 , et al. (2018). Airborne observations of reactive inorganic chlorine and bromine species in the exhaust of coal-fired power plants.

show abstract

Section: Resultsmentioning

confidence: 99%

Airborne Observations of Reactive Inorganic Chlorine and Bromine Species in the Exhaust of Coal‐Fired Power Plants

et al. 2018

View full text Add to dashboard Cite

show abstract

“…These tools systematically consider the impact of the input parameter uncertainty. Frey and Rubin [25] have suggested that stochastic modelling provides a more profound insight into the process performance and may lead to different decisions compared to the deterministic analysis. Their study, where the performance and costs of an advanced technology for SO 2 and NO x emission control from coal-fired power plant was stochastically analysed, revealed that uncertainties have a considerable effect on the system costs.…”

Section: Introductionmentioning

confidence: 99%

Probabilistic performance assessment of a coal-fired power plant

et al. 2015

View full text Add to dashboard Cite

“…The CuO/CuSO 4 combination can act as a catalyst for the selective reduction of NO with externally injected NH 3 . After the capacity of the sorbent for SO 2 has been exhausted, the sorbent may be regenerated using H 2 or CH 4 . During the regeneration step, CuSO 4 is first reduced to elemental Cu that is subsequently oxidized to CuO in the presence of oxygen.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of the Selective Catalytic Reduction of NO with NH₃ over CuO/γ-Al₂O₃

Sirdeshpande

Lighty

2000

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

A laboratory investigation of NO x reduction by NH 3 over sulfated and unsulfated CuO/γ-Al 2 O 3 was carried out. The rate of the selective catalytic reduction (SCR) reaction with excess O 2 over presulfated sorbent between 325 and 425°C in the absence of H 2 O and HCl was quantified by a first-order expression with a pre-exponential factor of 3.5 × 10 9 cm 3 gm -1 s -1 and an activation energy of 84.5 kJ/mol. HCl and H 2 O were shown to be detrimental to the SCR process. The behavior of NO and NH 3 over the fresh sorbent has an important bearing on reactor design. When NO is not present, NH 3 is rapidly oxidized to NO and N 2 O above 250°C. When both NO and NH 3 are present, the SCR reaction still occurs, but the catalyst activity is much lower. However, above 425°C the selectivity of fresh sorbent is poor with a significant amount of NH 3 being oxidized. Some NH 3 is also reduced to N 2 .

show abstract

Probabilistic Evaluation of Advanced SO₂/NO_x Control Technology

Cited by 15 publications

References 2 publications

Airborne Observations of Reactive Inorganic Chlorine and Bromine Species in the Exhaust of Coal‐Fired Power Plants

Airborne Observations of Reactive Inorganic Chlorine and Bromine Species in the Exhaust of Coal‐Fired Power Plants

Probabilistic performance assessment of a coal-fired power plant

Kinetics of the Selective Catalytic Reduction of NO with NH₃ over CuO/γ-Al₂O₃

Contact Info

Product

Resources

About

Probabilistic Evaluation of Advanced SO2/NOx Control Technology

Cited by 15 publications

References 2 publications

Airborne Observations of Reactive Inorganic Chlorine and Bromine Species in the Exhaust of Coal‐Fired Power Plants

Airborne Observations of Reactive Inorganic Chlorine and Bromine Species in the Exhaust of Coal‐Fired Power Plants

Probabilistic performance assessment of a coal-fired power plant

Kinetics of the Selective Catalytic Reduction of NO with NH3 over CuO/γ-Al2O3

Contact Info

Product

Resources

About

Probabilistic Evaluation of Advanced SO₂/NO_x Control Technology

Kinetics of the Selective Catalytic Reduction of NO with NH₃ over CuO/γ-Al₂O₃