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Catalytic Converter - DOAJ

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Last Updated: 02 October 2022

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Selective Adsorptive Recovery of Platinum from Spent Catalytic Converter

The Ethylene glycol dimethacrylate copolymer was synthesized by condensation reaction between monomeric mercaptoacetamide and?-dibromoalkanes in U2013. The EGDMA-DTDA copolymer was evaluated for Pt2+ adsorption in terms of adsorption isotherm and selectivity. At optimum pH = 1. 75 mg g-1, the copolymer demonstrated monolayer Langmuir-type adsorption isotherm with a qm of 177 mg g-1.

Source link: https://doi.org/10.3303/CET2294060


Prediction of Heat Transfer and Fluid Flow Effects on Entropy Generation in a Monolithic Catalytic Converter Using Large-Eddy Simulation

Heat transfer and fluid flow in a realistic catalytic converter of a Lada Niva 21214 vehicle are investigated in the present research using large eddy simulations. Using the DarcyU2013Forchheimer link, the pressure drop over the catalytic converter is determined for dry air at constant temperature, various volumetric flow rates, and extended to high volumetric flow rates for dry air and exhaust gas under realistic engine conditions at first. By using the large-eddy simulation, nonreacting isothermal conditions and nonreacting conditions with conjugate heat transfer are investigated for nonreactive isothermal temperature control and nonreactive heat transfer. In contrast, entropy production due to heat transport in the monolith region is very small, relative to viscous dissipation effects in the pipe regions.

Source link: https://doi.org/10.3390/e24050602


Copper Oxide Nanoparticles Incorporated in the Metal Mesh Used to Enhance the Heat Transfer Performance of the Catalytic Converter and to Reduce Emission

The paper explores how using a numerical fluid dynamic to simulate the transient temperature profile of a chemically heated catalytic converter in exhaust can help with the construction of a more robust and energy-efficient catalytic converter. Nanoparticles have been used as a heat transfer enhancer in this study to increase the exhaust gas's thermal conductivity. In the planned catalytic converter, it has been suggested that this research be used to determine the flow behavior and heat transfer of nanoparticles. When the temperature of the main converter reaches 250°C and the CO exceeds 2. 7% Vol. and the carbon monoxide conversion efficiency is highest, 50% carbon monoxide conversion efficiency is possible, it is shown that in the converter with nanocopper oxide technology. 300 °C is the maximum allowed temperature for HC light-off temperatures, with nanocopper oxide reaching this temperature in 168 seconds.

Source link: https://doi.org/10.1155/2022/9169713


Assessment of the integration of Three-Way Catalytic converter and Thermoelectric Generator

A dependable way to restore exhaust heat in automobiles is to include a Thermoelectric Generator, which can also raise energy efficiency. When TWC with the coupled carrier is stably operating stably, the maximum output power of TEG is increased. The latest TEG with coupled TWC carrier has the highest conversion rates for CO, NO, and H2gases. Response energy is transferred to the hot side of TEG, and the one-sixth TEG's output power can be increased to 306. 2W under optimum and transient conditions.

Source link: https://doi.org/10.1016/j.egyr.2022.05.175


Research on characteristics of thermoelectric generator with integrated muffler and catalytic converter

A substantial amount of heat loss is found in automobile exhaust, which has a high chance of energy conservation. A catalytic converter is suggested in order to save the heat in the exhaust gas and increase the compatibility of thermoelectric generator, muffler, and catalytic converter. The results show that when the exhaust temperature is 350 °C and inlet velocity is 30 m/s, the average surface temperature of model B is the highest, which is 291. 95 b0C. The transmission loss of the three models is higher than that of the original muffler, compared to the vehicle's original muffler. From the viewpoint of increasing NOx conversion rates, the exhaust flow field configuration of the Model B exhaust flow field is more uniform and has less impact on NOx's conversion rate.

Source link: https://doi.org/10.1016/j.egyr.2021.11.120


In situ synthesis and preconcentration of cetylpyridinium complexed hexaiodo platinum nanoparticles from spent automobile catalytic converter leachate using cloud point extraction

In the present study, a green chemistry-based cloud point extraction technique was developed for the in situ synthesis and preconcentration of cetylpyridinium complexed hexaiodo platinum nanoparticles from a spent automobile catalyst catalytic converter's leachate of potassium iodide and assisted by a mixture of cationic and non-ionic surfactants; cetylpyridinium bromide and Triton X-io X X- X-based cloud point extraction method developed chemistry based cloud point extraction of synthesis and pre-prepar hexaio platinum nanoparticles X-io hexaio bromidge ion io ton hexaio hexaylpyrio io e and non-io io ido iodo Xaio xaido do bromidgeo s; and Preconcentration factors for a reaction volume of 25 mL were determined by continuum source electro-thermal atomic absorption spectrometry, and a preconcentration factor of 25 was determined. The synthesized Pt-I NP's dual solubility of the synthesized Pt-I NP shows gains including simultaneous synthesis and preconcentration; synthesis at micromolar concentration from metal scrap, higher nanoparticle recycling; and biodegradability and biocompatibility of the employed surfactants; and dual solubility of the synthesized Pt-I NP. Hence, the proven method can be used for the separation, large scale synthesis, and preconcentration of Pt-I NP from various environmental and industrial wastes in a single pot.

Source link: https://doi.org/10.1016/j.arabjc.2019.10.008


EMISSION REDUCTION FROM A DIESEL ENGINE FUELED BY CERIUM OXIDE NANO-ADDITIVES USING SCR WITH DIFFERENT METAL OXIDES COATED CATALYTIC CONVERTER

This paper presents the findings of experimental studies on the effects of cerium oxide addition in nanoparticle form on key physiochemical properties and the performance of diesel. With ASTM standard procedures, sole diesel fuel and modified fuel's physiochemical characteristics were tested. Cerium oxide is an oxygen-donating catalyst that also supplies nitrogen for oxidation of CO during combustion. The active energy of cerium oxide helps to eliminate carbon deposits within the engine cylinder at the wall temperature and prevents the deposition of non-polar compounds on the cylinder wall, resulting in a decrease in HC emission by 56. 5 percent. A decrease in NOx emissions, according to the author, is 55%. U201360% is the highest NOx pollution decline since 2005. According to the tests, cerium oxide nanoparticles can be used in diesel to increase complete combustion of the fuel and minimize emissions significantly.

Source link: https://doaj.org/article/a80701db989f44c9b9d2118442c3c219


Spider Web Shape of Brass Catalytic Converter for Reducing Exhaust Gas Emission

Human health and the erosion of the ozone layer have been traced to its gas emission. In this study, a specially designed catalytic converter made from brass wire in the form of spider web pattern was integrated into a standard motorcycle exhaust system. Using Gas Analyzer, the converter's results were investigated for several engine rotation speeds, as well as measuring CO and HC of exhaust. By comparing the exhaust of a standard exhaust system with a modified exhaust system, it can be concluded that the converter was able to minimize the exhaust emission gas. The percentage of decrease in HC content dropped by 36,88 percent for the converter fitted exhaust system, compared to 61. 2 percent for the standard one. The decline percentage for CO content was 19. 90% compared to 80. 1 percent for the standard one.

Source link: https://doi.org/https://doi.org/10.22219/jemmme.v2i1.4902


Computational Method of Aging Index for Catalytic Converter Based on Wavelet Transform

The conversion rate of a catalytic converter is one of the key monitoring and evaluation indicators used to monitor vehicle exhaust emission effectively. The aim is to determine the eigenvector and correlation coefficient of signal energy delivery, as well as the two signal correlativity by using the Daubechies wavelet functions to analyze voltage signals of front and back oxygen sensors.

Source link: https://doaj.org/article/bbb35eff06024e2e81f1265f63209229


The Effect of Bed Catalyst Design Variation on Catalytic Converter against Exhaust Emission Level of Carbon Monoxide (CO) and Hydrocarbon (HC) in Gasoline Engine

This research sought to determine the effect of catalyst bed design variation on catalytic converter exhaust emissions of carbon monoxide and hydrocarbons in a gasoline engine exhaust emissions. The aim of this study was to determine the degree of exhaust emissions with and without application of bed catalyst variation by putting hole on the top and bottom of the bed catalyst portion, and without using bed catalyst variation. The HC content on full hole variation was 543 ppm at 6500 RPM, hole on the middle and side was 509 ppm at 7500 RPM, according to a survey by the bed catalyst, and hole on the top and bottom was 509 ppm at 7500 RPM, whereas the result with variation hole showed that the HC level on the top and bottom was 509 ppm at 7500 RPM.

Source link: https://doi.org/10.17977/um016v2i22018p064

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions