Improvement of NOX Reduction Rate of Urea SCR System Applied for an Non-Road Diesel Engine

2019 ◽  
Vol 20 (6) ◽  
pp. 1153-1160 ◽  
Author(s):  
Joonsoo Han ◽  
Taemin Kim ◽  
Haksup Jung ◽  
Sukang Pyo ◽  
Gyubaek Cho ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Nox Reduction ◽  
Reduction Rate ◽  
Scr System

scholarly journals Investigation of Urea Uniformity with Different Types of Urea Injectors in an SCR System

Catalysts ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1269
Author(s):  
Muhammad Khristamto Aditya Wardana ◽  
Kwangchul Oh ◽  
Ocktaeck Lim
Keyword(s):  
Diesel Engine ◽  
Catalytic Reduction ◽  
Nox Reduction ◽  
Heavy Duty ◽  
Ammonia Gas ◽  
Experimental Parameters ◽  
Heavy Duty Diesel Engine ◽  
Heavy Duty Diesel ◽  
Scr System

Heavy-duty diesel engines in highway use account for more than 40% of total particulate and nitrogen oxide (NOx) emissions around the world. Selective catalytic reduction (SCR) is a method with effective results to reduce this problem. This research deals with problems in the urea evaporation process and ammonia gas distribution in an SCR system. The studied system used two types of urea injectors to elucidate the quality of ammonia uniformity in the SCR system, and a 12,000-cc heavy-duty diesel engine was used for experimentation to reduce NOx in the system. The uniformity of the generated quantities of ammonia was sampled at the catalyst inlet using a gas sensor. The ammonia samples from the two types of urea injectors were compared in experimental and simulation results, where the simulation conditions were based on experimental parameters and were performed using the commercial CFD (computational fluid dynamics) code of STAR-CCM+. This study produces temperatures of 371 to 374 °C to assist the vaporization phenomena of two injectors, the gas pattern informs the distributions of ammonia in the system, and the high ammonia quantity from the I-type urea injector and high quality of ammonia uniformity from the L-type urea injector can produce different results for NOx reduction efficiency quality after the catalyst process. The investigations showed the performance of two types of injectors and catalysts in the SCR system in a heavy-duty diesel engine.

A Study on Nox Reduction of SCR System in Heavy-Duty Diesel Engine to Achieve the Euro V Emission Limits

2012 ◽  
Vol 455-456 ◽  
pp. 974-980
Author(s):  
Xin Yun Zhi ◽  
Li Ping Huang ◽  
Hai Long Pang ◽  
Chun Run Zhang ◽  
Hao Li ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Nox Reduction ◽  
Experimental Studies ◽  
Test Results ◽  
Heavy Duty ◽  
Reduction Efficiency ◽  
Heavy Duty Diesel Engine ◽  
Heavy Duty Diesel ◽  
Emission Limits ◽  
Scr System

This paper presents the experimental studies on an SCR system for a mobile heavy-duty diesel engine to reduce NOx emission below Euro V emission limits. The test results obtained by one engine serving in China show that NOx emission was reduced to 1.81 g/kWh with ESC and 1.66 g/kWh with ETC, the reduction efficiency of NOx was reduced by about 80%, while the average NH3 slip is kept below 6 ppm.

Improvement of NOx Reduction Rate of Urea-SCR System by NH3 Adsorption Quantity Control

2008 ◽  
Author(s):  
Yutaka Murata ◽  
Sadahito Tokui ◽  
Soichiro Watanabe ◽  
Yasuhiro Daisho ◽  
Hisakazu Suzuki ◽  
...  
Keyword(s):  
Nox Reduction ◽  
Reduction Rate ◽  
Nh3 Adsorption ◽  
Quantity Control ◽  
Scr System ◽  
Adsorption Quantity

The Study of NOx Reduction Using Plasma-assisted SCR System for a Heavy Duty Diesel Engine

2011 ◽  
Author(s):  
Shinya Sato ◽  
Yoshihiro Kawada ◽  
Satoshi Sato ◽  
Mitsuru Hosoya ◽  
Akira Mizuno
Keyword(s):  
Diesel Engine ◽  
Nox Reduction ◽  
Heavy Duty ◽  
Heavy Duty Diesel Engine ◽  
Heavy Duty Diesel ◽  
Scr System

Design and Development of a Low Cost SCR System for NOx Reduction in a Diesel Engine

2019 ◽  
Author(s):  
Shamil Backer O ◽  
Akshay B P ◽  
Shameem K ◽  
Sharun K K ◽  
Pradeep V
Keyword(s):  
Diesel Engine ◽  
Low Cost ◽  
Nox Reduction ◽  
Design And Development ◽  
Scr System

A Study on NOx Reduction in a Medium Speed Diesel Engine Using a Charge Air Moisturizing Method

2005 ◽  
Author(s):  
Hyoung-Keun Park ◽  
Byong-Seok Kim ◽  
Jin-Won Kim ◽  
Sang-Hak Ghal ◽  
Jong-Kuk Park
Keyword(s):  
Diesel Engine ◽  
Nox Reduction ◽  
Flame Temperature ◽  
Combustion Process ◽  
Reduction Rate ◽  
Fuel Oil ◽  
Gas Temperature ◽  
Oil Consumption ◽  
Medium Speed ◽  
A Charge

NOx forms during a combustion process and contributes to ozone, smog, acid rain, eutrophic soil, etc. The use of water to prevent NOx formation during the combustion process is well known. Adding water to the combustion process reduces the flame temperature by increasing the specific heat capacity of charge air. Moisturizing a charge air is one of the most effective methods to add water to the combustion process. In this study, the characteristics of charge air moisturizing method were evaluated on cylinder pressure, heat release rate, exhaust gas temperature, specific fuel oil consumption, NOx reduction rate, etc., using the medium speed diesel engine with a single cylinder.

Sign in / Sign up

Export Citation Format

Share Document