Experimental investigation on emission reduction in neem oil biodiesel using selective catalytic reduction and catalytic converter techniques

2018 ◽  
Vol 25 (14) ◽  
pp. 13548-13559 ◽  
Author(s):  
Karthickeyan Viswanathan
Keyword(s):  
Experimental Investigation ◽  
Selective Catalytic Reduction ◽  
Emission Reduction ◽  
Catalytic Reduction ◽  
Catalytic Converter ◽  
Neem Oil

scholarly journals Monitoring of Basic Parameters for Selective Catalytic Reduction System Used in an Agricultural Tractor

2014 ◽  
Vol 62 (1) ◽  
pp. 225-230
Author(s):  
Antonín Skřivánek ◽  
Pavel Sedlák ◽  
Adam Polcar ◽  
Petr Dostál
Keyword(s):  
Selective Catalytic Reduction ◽  
Emission Reduction ◽  
Catalytic Reduction ◽  
Catalytic Converter ◽  
Operating Conditions ◽  
Measurement Results ◽  
Basic Parameters ◽  
Reduce Emissions ◽  
Scr System ◽  
Agricultural Tractor

Presented paper describes monitoring of basic parameters for selective catalytic reduction (SCR) system used in an agricultural tractor. SCR systems are used to reduce emissions of nitrogen oxides (NOx) produced by combustion of fuel. The usage of SCR catalytic converters entails certain disadvantages in the use of reducing agent and the necessity of suitable operating conditions to achieve optimum efficiency of the catalytic converter. This paper aims to predict consumption of AdBlue depending on the temperature of SCR catalytic converter, which reflects the engine load and monitoring the effectiveness of SCR catalytic converter when operating a tractor engine with a maximum dose of fuel. To fulfill those aims, the measurements have been performed on the Case Puma 185 CVX agricultural tractor. As the measurement results indicate, the lowest NOx emissions correspond to high consumption of AdBlue. Other studies imply that the catalytic converter operates at optimal operating temperature and with the highest efficiency of NOx emission reduction. The effectiveness of NOx emission reduction is thus affected not only by quantity of injected reagent but also by catalytic converter thermal load. Further measurement results indicate that the lowest amount of emissions of NOx (and the highest efficiency rate) is achieved by catalytic converter in a range in which the engine operates with the highest engine efficiency.

Experimental Investigation on N2O Formation during the Selective Catalytic Reduction of NOx with NH3 over Cu-SSZ-13

2019 ◽  
Vol 58 (45) ◽  
pp. 20516-20527 ◽  
Author(s):  
Biao Liu ◽  
Dongwei Yao ◽  
Feng Wu ◽  
Lai Wei ◽  
Xingwen Li ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
N2o Formation ◽  
Reduction Of Nox

scholarly journals Reduction of NOx Emission of a Diesel Engine with a Multiple Injection Pump by SCR Catalytic Converter

2016 ◽  
Vol 64 (4) ◽  
pp. 1205-1210 ◽  
Author(s):  
Vít Marek ◽  
Lukáš Tunka ◽  
Adam Polcar ◽  
Dušan Slimařík
Keyword(s):  
Diesel Engine ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Catalytic Converter ◽  
Nox Emission ◽  
Multiple Injection ◽  
Scr Catalyst ◽  
Exhaust Gases ◽  
Injection Pump ◽  
Reduction Of Nox

This paper deals with reduction of NOx-emission of a diesel engine with multiple injection pump by SCR catalytic converter. Main aim of the measurement was the detection of SCR catalyst converter efficiency. Tests were realized at the Research and Development workplace of Zetor Tractor a.s. Used engine was equipped with a multiple injection pump with electromagnetic regulator of a fuel charge. During the experiment selective catalytic reduction and diesel particulate filter were used as an after treatment of harmful pollutants reduction. Testing cycle of the eight-point test was chosen and Non-Road Steady Cycle (NRSC) was maintained according to 97/68/EC directive. Results confirmed the dependencies between temperatures of SCR catalyst and exhaust gases and the volume of exhaust gases on efficiency of SCR catalyst. During the operation load of the engine, selective catalytic reduction reached efficiency over 90 %. Used after treatment system is suitable for reduction of harmful pollutants according to the Tier 4f norm.

scholarly journals Influence of Selective Catalytic Reduction (SCR) system on stainless steel durability

2013 ◽  
Vol 66 (2) ◽  
pp. 153-158
Author(s):  
Claudine Miraval ◽  
Saghi Saedlou ◽  
Romain Evrard ◽  
Pierre-Olivier Santacreu ◽  
Johan Leseux
Keyword(s):  
Stainless Steel ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Material Selection ◽  
Catalytic Converter ◽  
Water Solution ◽  
Urea Solution ◽  
Diesel Vehicles ◽  
Set Up ◽  
Corrosion Mechanisms

Stainless steel is largely used in the car exhaust market and will be applied now for truck and off-road vehicles. In that field of application, designs are more and more complex with the integration of a catalytic converter and particle filter, consequence of more and more severe diesel depollution regulations. In particular, due to the necessity of reducing NOx emission established by Euro 5 standard (2009), Euro 6 (2014) and American Tier 4 (2014), new equipment were developed for diesel vehicles (truck as well as car). The most promising technology is called Selective Catalytic Reduction (SCR) and takes advantage of the reduction feature of ammonia (NH3) on NOx. As NH3 cannot be stored directly within the vehicle for safety reasons (toxicity & flammability of ammonia) urea in water solution was selected to initiate the reaction by means of a spraying nozzle. To get a better understanding of the involved hot corrosion mechanisms and afterward to improve material selection, a dedicated laboratory test was developed at Isbergues Research Center. The simulated test consists of spraying urea solution on cyclic heated stainless steel in a range from 200ºC to 600ºC. We evidenced a nitriding mechanism due to the urea decomposition on the surface of stainless steel at high temperature, and also the very different behaviours between austenitic and ferritic grades. The last one, in particular K41X (1.4509-441) and K33X (1.4513-molybdenum stabilized ferritic) grades show the best performance in particular when compared to the standard 304 austenitic grade. The paper will review the test set-up, the result obtained and will discuss the stainless steel grade selection for the SCR application.

Microkinetic modelling for selective catalytic reduction (SCR) of NOx by propane in a silver-based automotive catalytic converter

2012 ◽  
Vol 111-112 ◽  
pp. 165-177 ◽  
Author(s):  
B. Sawatmongkhon ◽  
A. Tsolakis ◽  
K. Theinnoi ◽  
A.P.E. York ◽  
P.J. Millington ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Catalytic Converter ◽  
Scr Of Nox

Experimental investigation on emission reduction in diesel engine by using biodiesel with catalytic converter

2020 ◽  
Author(s):  
Senthilkumar Jayapalan ◽  
B. R. Ramesh Bapu ◽  
Kalaiyarasan ◽  
P. Hemanthkumar ◽  
Jayaprakash Venugopal ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Diesel Engine ◽  
Emission Reduction ◽  
Catalytic Converter

Experimental investigation on emission reduction in diesel engine by using biodiesel fuel with nano catalytic converter

2020 ◽  
Author(s):  
Valarmathi Thirumalai Natesan ◽  
Senthilkumar Jayapalan ◽  
Purusothaman Mani ◽  
J. Harish Raj ◽  
S. Lingesh Raj
Keyword(s):  
Experimental Investigation ◽  
Diesel Engine ◽  
Emission Reduction ◽  
Catalytic Converter ◽  
Biodiesel Fuel

An Overview: Environmental and Economic Strategies for Improving Quality of Ships Exhaust Gases

2015 ◽  
Vol 157 (A1) ◽  
pp. 53-64 ◽  
Keyword(s):  
Selective Catalytic Reduction ◽  
Emission Reduction ◽  
Sea Water ◽  
Catalytic Reduction ◽  
Operating Cost ◽  
Environmental Damage ◽  
Ship Emissions ◽  
Exhaust Gases ◽  
Advantages And Disadvantages ◽  
Passenger Ships

"In spite of the fact that most of different transport means have achieved a significant reduction of their emissions quantity during the last few years; maritime field still suffers from the steady increase in the quantity of exhaust gases emitted from ships. As a result, the International Maritime Organization was prompted to issue a set of regulations for facing the seriousness of those emissions. The present paper handles the different methods which can be used to reduce the environmental damage caused by ship emissions. Through the study of the advantages and disadvantages of ships, emission reduction strategies; use of natural gas, selective catalytic reduction and sea water scrubbing systems have appeared as the best ways that can be utilized to reduce the environmental harms caused by ship emissions. Applicability of these methods aboard ships could vary from ship to another. Two high-speed passenger ships of different age were studied to evaluate the importance of applying these strategies. The results showed the possibility to attain valuable emission reduction percentage by using of selective catalytic reduction and sea water scrubbing systems, but they will be of high initial cost and will increase operating cost of both ships. On the other hand using of LNG as alternative fuel will be more convenient from the point of view of environment and economic issues for the newer existing ship."

Estimation of Ammonia Storage Nonuniformity for Urea-Based Selective Catalytic Reduction Systems

2019 ◽  
Vol 141 (4) ◽  
Author(s):  
Qinghua Lin ◽  
Pingen Chen
Keyword(s):  
Selective Catalytic Reduction ◽  
Emission Reduction ◽  
Catalytic Reduction ◽  
Urea Solution ◽  
Coverage Ratio ◽  
Ammonia Storage ◽  
Simulation Results ◽  
Parallel Configuration ◽  
Scr Model ◽  
The Impact

Ammonia storage nonuniformity has a significant impact on the emission reduction performance of urea-based selective catalytic reduction (SCR) systems. In this paper, a unique SCR platform with two catalysts in a parallel configuration was created for investigating the impact of ammonia storage nonuniformity on the emission reduction performance in a simulation environment. The established two-cell SCR platform allows users to independently control the ammonia-to-NOx ratio (ANR) for each catalyst using two independent urea solution injectors. Simulation results over US06 cycle demonstrate that, compared to the case without ammonia storage nonuniformity, the tailpipe NOx and ammonia emissions can be increased by 6.73% and 22.0%, respectively, due to the nonuniform ammonia storage in the case of an ANR nonuniformity index (NUI) at 0.2. Furthermore, an innovative model-based method was proposed for estimating the ammonia coverage ratio nonuniformity (i.e., ammonia storage nonuniformity if storage capacity is known) by utilizing a control-oriented SCR model and the tailpipe NOx and ammonia measurements at the confluence point. Simulation results proved the effectiveness of the proposed method in estimating the ammonia coverage ratio nonuniformity.

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