Investigation of selective catalytic reduction for control of nitrogen oxides in full-scale dairy energy production

Camarillo, Mary Kay; Stringfellow, William T.; Hanlon, Jeremy S.; Watson, K.A.

doi:10.1016/j.apenergy.2013.01.066

Cited by 21 publications

(8 citation statements)

References 23 publications

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“…Among the secondary ones, NO x selective reduction, either non-catalytic (SNCR) or catalytic (SCR), are the most used (i.e. are considered by the EU as Best Available Techniques for NO x abatement from large stationary sources) [2,8]. NO x selective reduction is based on the reaction of NO x with a reducing agent, most commonly ammonia, yielding molecular nitrogen and water.…”

Section: Introductionmentioning

confidence: 99%

Selective catalytic reduction of NO in a reverse-flow reactor: Modelling and experimental validation

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Selective catalytic reduction of NO in a reverse-flow reactor: Modelling and experimental validation

et al. 2015

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“…To limit the harmful NOx emissions from the diesel engine group, generally post-combustion control devices are adopted, such as the selective catalytic reduction (SCR) system, to deal with nitrogen oxide (NOx) emissions. The SCR technology reduces the NOx emissions at a high conversion efficiency but a limited reductant slip to satisfy the increasingly stringent regulations. − SCR has been widely applied in many industrial facilities including diesel vehicles, thermal power plants, and industry furnaces . In practical industrial applications, the SCR system using urea as a reducing agent has a urea injector to inject liquid urea into the catalyst container in the engine exhaust pipe …”

Section: Introductionmentioning

confidence: 99%

NOx Emission Removal from a Parallel Diesel Engine Group by SCR System Based on Distributed Control Technology

Lei

Qin

Qiu

et al. 2021

Environ. Sci. Technol.

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In industrial application, an engine group with several engines running in parallel produces emissions, and because of its variable operation conditions and the number of engines being run, it produces great pollution. This study proposes a distributed control system (DCS) method to deal with NOx emissions from a diesel engine group. This DCS method contains several diesel engine test benches in parallel, and each engine is connected to an independent DCS unit with a selective catalytic reduction (SCR) device, and the central processing unit (CPU) distributes controlling quantities to each DCS unit. A dimensionless parameter, coefficient of difficulty K, is introduced to evaluate the NOx conversion efficiency of each unit. A control algorithm adopting the minimum K as the optimization control object to distribute the real-time NOx conversion efficiency for each unit is presented. This DCS deNOx technology has been applied in 10-engine test benches in parallel, and the results show that the DCS method not only controls NOx emissions of the engine group within the emission standard limit but also exhibits a good economic performance for suitable NOx conversion efficiency distribution and economical urea injection dose. This DCS emission control method is suitable for multiple diesel engines running in parallel under conditions of varied speeds and loads.

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“…There have also been many studies on using EGR in ships. Selective catalytic reduction (SCR) is being applied to large vehicles such as diesel engine trucks and in onshore power plants to reduce NOx [19]. It has also been installed in many ships.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Emission Characteristics with a Wet-Type Exhaust Gas Cleaning System for Marine Diesel Engine Application

Ryu

Kim

et al. 2020

JMSE

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Global air pollution regulations are becoming stricter for large diesel engines powering automobiles and ships. In the automotive sector, Euro 4 regulations came into force in January 2013 in accordance with European Union (EU) emission standards for heavy-duty diesel engines and are based on steady-state testing. In the marine sector, the International Maritime Organization(IMO) Maritime Environment Protection Committee(MEPC) is a group of experts who discuss all problems related to the prevention and control of marine pollution from ships, such as efforts to reduce ozone-depleting substances and greenhouse gas emissions. To reduce the harmful emissions from marine diesel engines, a wet-type exhaust gas cleaning system was developed in this study. As a test, seawater, electrolyzed water, and sodium hydroxide were sequentially injected into the exhaust gas. SO2 was reduced by 98.7–99.6% with seawater injection, NOx by 43.2–48.9% with electrolyzed water injection, and CO2 by 28.0–33.3% with sodium hydroxide injection.

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Investigation of selective catalytic reduction for control of nitrogen oxides in full-scale dairy energy production

Cited by 21 publications

References 23 publications

Selective catalytic reduction of NO in a reverse-flow reactor: Modelling and experimental validation

Selective catalytic reduction of NO in a reverse-flow reactor: Modelling and experimental validation

NOx Emission Removal from a Parallel Diesel Engine Group by SCR System Based on Distributed Control Technology

Investigation on the Emission Characteristics with a Wet-Type Exhaust Gas Cleaning System for Marine Diesel Engine Application

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