Abstract
Emissions of NOX from automobile causes various environmental impacts. In order to satisfy the emission norms and standards, it is necessary to reduce the toxic gases from emission. This paper concentrates on designing a packed column and analysis on the selection of an effective absorbent to reduce NOX emission from diesel engines. NOX emission is taken from the exhaust of diesel engine (Kirloskar TV1 Diesel engine). Flue gas inlet to the packed column and the treated gas at the outlet of the packed column are measured using NOX inlet and outlet gas sensors, respectively. Absorbent flow is carried out in a lab-scale packed column experimental setup. Various parameters of the packed column such as liquid: gas ratio, diameter, total height and packing height are determined based on the mathematical modeling. The NOX emission was experimentally measured with various combinations of different absorbents with different flow rate. Based on the experiments, effective absorbents are chosen as NaClO2 and NaOH. Experimental results show chemical absorbent combination with 0.5 M concentration of sodium chlorite and 0.3 M concentration of sodium hydroxide at 80% data acquisition card opening condition is absorbing NOX effectively.
Highlights
Emission of toxic gases like Nitrogen oxide (NOX) causes acid rain and other forms of pollution
Inlet NOX emission is taken from the exhaust of diesel engine (Kirloskar TV1 Diesel engine)
NOX from the chamber enters at the bottom of packed column
Summary
Emission of toxic gases like NOX causes acid rain and other forms of pollution. NOX emissions are produced due to the combustion of diesel engines in the transport sector and other industries.[1]. The major emissions of pollutants from coal combustion at thermal power plants, transport sector and other industries are carbon monoxide (CO), Nitrogen oxide (NOX), Sulfur oxide (SOX), Chlorofluorocarbons (CFC) and Suspended Particulate Matters (SPM), such as fly ash, soot and other trace gas species.[1] Industries located in Asian countries lead to rapid increase in energy usage and as a consequence, emission of NOX is increased.[3] Even the vehicles with some of the biodiesel produce NOX emissions.[4] Various changes and technological advancements in diesel engine combustion systems are required to satisfy the emission standards and norms.[5] In case of diesel engines nowadays, there is a necessity toward increasing the performance of the engine and to satisfy the emission norms toward NOX emissions.[6] Compared to that of other fuels, diesel fuel emission exhausts more NOX.[7] Considering the harmful emissions of engine exhaust, researchers derived various solutions like adding oxidation catalysts, anti-oxidation catalysts and so on.[8] NOX and other emission reduction techniques were proposed by various researchers,[9,10,11] and they proposed different devices such as packed column,[12] budding jet reactor,[13]
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