De–NO x conversion of selective catalytic reduction system for diesel engine using dual catalyst coated ceramic monoliths
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Devakaran Karaiellapalayam Palanisamy
und
Arunshankar Jayabalan
Abstract
Selective Catalytic Reduction (SCR) is a well-known method for reducing Oxides of Nitrogen (NO x ) emissions from the exhaust manifold of the engine. Retrofitting SCR system to the diesel engines and, enhancing the catalyst activity along with injection controller of this system has become necessary because of stringent emission standards. In this work, dual catalyst is used to increase catalytic activity and, controlled urea injection is applied to decrease the slip of SCR system for stationary diesel engine. First, a pair of ceramic monolith substrate is selected and, coated with cerium oxide and Cu–zeolite for oxidation and SCR catalyst, respectively. XRD, BET and TGA–DSC are used to analyze the structural, and electrochemical behavior of the synthesized catalyst. The morphology and element composition of dual catalyst coated over the substrates are studied using FE-SEM and XEDS. Second, the thermocouple and rotary encoder are used to control the injector of SCR system, which injects the urea when the burned NO x leaves the engine exhaust manifold and enters the SCR. Finally, the diesel engine performance indicators and emission reduction due to the SCR system are evaluated under Non Road Steady Cycle (NRSC). From the experimental results, it is observed that the combined action of catalyst provides wide operating range between 153 and 425 °C and, controlled urea injection at 220° of exhaust valve opening with rate of 24.44 ms per cycle achieved a high De–NO x conversion efficiency of 93.4 % for SCR system, with a marginal reduction in engine Brake Thermal Efficiency (BTE) at maximum Brake Power (BP) condition. Thus, diesel engine exhaust retrofitted with SCR system proposed in this work will meet the Euro-VI emission standards.
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: None declared.
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Conflict of interest statement: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Abbreviations
- SCR
-
Selective Catalytic Reduction
- NO x
-
Nitrogen Oxide
- NRSC
-
Non Road Steady Cycle
- BTE
-
Brake Thermal Efficiency
- PM
-
Particulate Matter
- BP
-
Brake Power
- IC
-
Internal Combustion
- HC
-
Hydrocarbon
- CO
-
Carbon Monoxide
- PM
-
Particulate Matter
- V2O5
-
Vanadium pentoxides
- DOC
-
Diesel Oxidation Catalyst
- DPF
-
Diesel Particulate Filter
- XRD
-
X-ray Energy Dispersive Spectroscopy
- TGA
-
Thermo Gravimetric Analysis
- DSC
-
Differential Scanning Calorimetry
- BET
-
Brunauer Emmett Teller
- DFT
-
Density Functional Theory
- FE-SEM
-
Field Emission Scanning Electron Microscope
- XEDS
-
X-ray Energy Dispersive Spectroscopy
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Artikel in diesem Heft
- Frontmatter
- Articles
- Eco friendly synthesis of epoxidized palm oleic acid in acidic ion exchange resin
- Two-stage adsorber design for malachite green and methylene blue removal using adsorbents derived from banana peel
- Modeling and simulation of trickle bed reactors for the purification of 1-butene
- Smith-predictor based enhanced Dual-DOF fractional order control for integrating type CSTRs
- Enhancement investigation of mass transfer and mixing performance in the static mixers with three twisted leaves
- The influence of the configurations of multiple-impeller on canrenone bioconversion using resting cells of Aspergillus ochraceus
- De–NO x conversion of selective catalytic reduction system for diesel engine using dual catalyst coated ceramic monoliths
- Experimental study on coal-fired flue gas HCl removal by injecting adsorbent into flue duct
- Ferrous and manganese oxalate for efficient heterogenous-Fenton degradation of organic pollutants: composite active site and mechanism perception
Artikel in diesem Heft
- Frontmatter
- Articles
- Eco friendly synthesis of epoxidized palm oleic acid in acidic ion exchange resin
- Two-stage adsorber design for malachite green and methylene blue removal using adsorbents derived from banana peel
- Modeling and simulation of trickle bed reactors for the purification of 1-butene
- Smith-predictor based enhanced Dual-DOF fractional order control for integrating type CSTRs
- Enhancement investigation of mass transfer and mixing performance in the static mixers with three twisted leaves
- The influence of the configurations of multiple-impeller on canrenone bioconversion using resting cells of Aspergillus ochraceus
- De–NO x conversion of selective catalytic reduction system for diesel engine using dual catalyst coated ceramic monoliths
- Experimental study on coal-fired flue gas HCl removal by injecting adsorbent into flue duct
- Ferrous and manganese oxalate for efficient heterogenous-Fenton degradation of organic pollutants: composite active site and mechanism perception
