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04-09-2017 | Issue 3/2017

Emission Control Science and Technology 3/2017

Selective Non-catalytic Reduction (SNCR) of CO2 and NO Emissions from a Single-Cylinder CI Engine Using Chemical Absorbents

Journal:
Emission Control Science and Technology > Issue 3/2017
Authors:
S. Thiyagarajan, V. Edwin Geo, Leenus Jesu Martin, B. Nagalingam

Abstract

The present study focuses on the reduction of CO2 and NO emission from a single-cylinder compression ignition (CI) engine fuelled with diesel using a selective non-catalytic reduction (SNCR) system. SNCR of NO and CO2 emission is investigated due to its ease in retrofitting to existing vehicles. Four chemical absorbents, namely, succinic acid, anhydrous ammonia, monoethanolamine (MEA), and diethylamine (DEA), were injected downstream of exhaust gas. The absorbents were injected using a mechanical injector and pump unit, which operates at 1500 rpm. The flow rate was optimized and fixed at 1 kg/h for all the absorbents. A separate mixing chamber was developed for increasing the resident time for the reaction between absorbents and exhaust gases, which was placed after the injection unit. The results exhibit that diesel + MEA emitted minimum CO2 and NO emission compared to other absorbents in the SNCR system. The MEA-based SNCR system reduced CO2 and NO emission by 15 and 10%, respectively, in comparison with diesel at 100% load condition. However, while using the SNCR system, slight fuel penalty was observed because of backpressure.

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