Thermal process and NO emission reduction characteristics of a new-type coke oven regenerator coupled with SNCR process

Fuel ◽  
2021 ◽  
Vol 305 ◽  
pp. 121510
Author(s):  
Yujie Zhao ◽  
Junxiao Feng ◽  
Yanmei Chen ◽  
Huanbao Fan ◽  
Wei Bai
Keyword(s):  
Emission Reduction ◽  
Thermal Process ◽  
Coke Oven ◽  
No Emission ◽  
New Type ◽  
Reduction Characteristics

scholarly journals Numerical simulation of NO emission reduction in coke oven regenerator with synergistic SNCR/SCR process

2021 ◽  
Vol 267 ◽  
pp. 02053
Author(s):  
Yujie Zhao ◽  
Junxiao Feng
Keyword(s):  
Numerical Simulation ◽  
Spatial Distribution ◽  
Emission Reduction ◽  
No Reduction ◽  
Concentration Field ◽  
Coke Oven ◽  
Distribution Characteristics ◽  
No Emission ◽  
Gradient Distribution ◽  
Spatial Distribution Characteristics

According to the temperature gradient distribution characteristics of the regenerator of the coke oven, a method of synergistic the SNCR/SCR process inside the regenerator to achieve NO emission reduction was proposed in this work. Based on the verification of SNCR and SCR models, the NH3/NO concentration field and the spatial distribution characteristics of NO in the process of SNCR, SCR, and SNCR+SCR were studied. The conclusion shows that the synergistic SNCR and SCR processes had achieved NO reduction by 64.3% and 37.1%, respectively. However, the increase in reaction temperature caused by the change of injection position resulted in a 0.4% decrease in SNCR+SCR compared to SNCR. It was also found that temperature dramatically influences the SNCR process and the reductant injection position. Limited by the structure of the regenerator and the catalyst coating area, the SCR process exhibited a low NO reduction ability. The SNCR+SCR process should focus on improving the efficiency of the SCR process.

Performance and emission reduction characteristics of cerium oxide nanoparticle-water emulsion biofuel in diesel engine with modified coated piston

2019 ◽  
Vol 26 (26) ◽  
pp. 27362-27371 ◽  
Author(s):  
Elumalai Perumal Venkatesan ◽  
Annamalai Kandhasamy ◽  
Arularasu Sivalingam ◽  
Appuraja Senthil Kumar ◽  
KrishnaMoorthy Ramalingam ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Cerium Oxide ◽  
Emission Reduction ◽  
Water Emulsion ◽  
Performance And Emission ◽  
Oxide Nanoparticle ◽  
Reduction Characteristics

A novel nanocomposite of Ca(OH)2-incorporated zeolite as an additive to reduce atmospheric emissions of PM and VOCs during asphalt production

2017 ◽  
Vol 4 (3) ◽  
pp. 613-624 ◽  
Author(s):  
Ajit Sharma ◽  
Byeong-Kyu Lee
Keyword(s):  
Asphalt Concrete ◽  
Emission Reduction ◽  
Atmospheric Pollutants ◽  
Atmospheric Emissions ◽  
Asphalt Production ◽  
Reduction Characteristics

An investigation is conducted into the emission reduction characteristics of atmospheric pollutants produced from an asphalt concrete (AC) mix using a Ca(OH)2-incorporated zeolite nanocomposite (Ca(OH)2@zeolite NC) synthesized as a recycling additive.

Research on Production of Bluecoke with Low Temperature Carbonization Process

2012 ◽  
Vol 724 ◽  
pp. 221-224
Author(s):  
Lei Wu ◽  
Jun Zhou ◽  
Xin Zhe Lan ◽  
Xi Cheng Zhao ◽  
Yong Hui Song ◽  
...  
Keyword(s):  
Low Temperature ◽  
New Technologies ◽  
Coke Oven ◽  
Raw Material ◽  
Carbonization Process ◽  
Advantages And Disadvantages ◽  
New Type ◽  
The Rich

Bluecoke is a new type carbon product that prepared by low temperature carbonization process, which take lignite, long flame coal, not sticky and weak glue coal as raw material. At the same time tar and coke oven gas as by-products can be obtained. Two new technologies of Bluecoke production were introduced based on summary of way of producing Bluecoke by low metamorphic coal, namely the rich oxygen carbonization and the microwave carbonization. Both ways have their advantages and disadvantages. By contrast, the quality of coke and the content of valid gas are better using microwave carbonization, which to follow-up industry chains development significantly.

scholarly journals Combustion and Emission Reduction Characteristics of GTL-Biodiesel Fuel in a Single-Cylinder Diesel Engine

Energies ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 2201 ◽  
Author(s):  
Kibong Choi ◽  
Suhan Park ◽  
Hyun Gu Roh ◽  
Chang Sik Lee
Keyword(s):  
Diesel Engine ◽  
Emission Reduction ◽  
Cetane Number ◽  
Experimental Results ◽  
Biodiesel Fuel ◽  
Injection Timing ◽  
Nox Emissions ◽  
Biodiesel Blends ◽  
Reduction Characteristics ◽  
Blended Fuels

The purpose of this paper is to investigate the effects of using gas to liquid (GTL)-biodiesel blends as an alternative fuel on the physical properties as well as the combustion and emission reduction characteristics in a diesel engine. In order to assess the influence of the GTL-biodiesel blending ratio, the biodiesel is blended with GTL fuel, which is a test fuel with various blending ratios. The effects of GTL-biodiesel blends on the fuel properties, heat release, and emission characteristics were studied at various fuel injection timing and blending ratios. The test fuels investigated here were GTL, biodiesel, and biodiesel blended GTL fuels. The biodiesel blending ratio was changed from 0%, 20% and 40% by a volume fraction. The GTL-biodiesel fuel properties such as the fuel density, viscosity, lower heating value, and cetane number were analyzed in order to compare the effects of different mixing ratios of the biodiesel fuel. Based on the experimental results, certain meaningful results were derived. The increasing rate of the density and kinematic viscosity of the GTL-biodiesel blended fuels at various temperature conditions was increased with the increase in the biodiesel volumetric fraction. The rate of density changes between biodiesel-GTL and GTL are 2.768% to 10.982%. The combustion pressure of the GTL fuel showed a higher pressure than the biodiesel blended GTL fuels. The biodiesel-GTL fuel resulted in reduced NOx and soot emissions compared to those of the unblended GTL fuel. Based on the experimental results, the ignition delay of the GTL-biodiesel blends increased with the increase of the biodiesel blending ratio because of the low cetane number of biodiesel compared to GTL. As the injection timing is advanced, the NOx emissions were significantly increased, while the effect of the injection timing on the soot emission was small compared to the NOx emissions. In the cases of the HC and CO emissions, the GTL-biodiesel blended fuels resulted in similar low emission trends and, in particular, the HC emissions showed a slight increase at the range of advanced injection timings.

scholarly journals Nitric Oxide Emission Reduction in Reheating Furnaces through Burner and Furnace Air-Staged Combustions

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1599
Author(s):  
Yonmo Sung ◽  
Seungtae Kim ◽  
Byunghwa Jang ◽  
Changyong Oh ◽  
Taeyun Jee ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Emission Reduction ◽  
No Reduction ◽  
Reduction Rate ◽  
No Emission ◽  
Combined Application ◽  
Zone Control ◽  
Before And After ◽  
Bottom Heat ◽  
Real Scale

In this study, a series of experiments were conducted on a testing facility and a real-scale furnace, for analyzing the nitric oxide (NO) emission reduction. The effects of the temperature, oxygen concentration, and amount of secondary combustion air were investigated in a single-burner combustion system. Additionally, the NO-reduction rate before and after combustion modifications in both the burner and furnace air-staged combustion were evaluated for a real-scale reheating furnace. The air-to-fuel equivalence ratio (λ) of individual combustion zones for the furnace was optimized for NO reduction without any incomplete combustion. The results indicated that the NO emission for controlling the λ of a single-zone decreased linearly with a decrease in the λ values in the individual firing tests (top-heat, bottom-heat, and bottom-soak zones). Moreover, the multi-zone control of the λ values for individual combustion zones was optimized at 1.13 (top-preheat), 1.0 (bottom-preheat), 1.0 (top-heat), 0.97 (bottom-heat), 1.0 (top-soak), and 0.97 (bottom-soak). In this firing condition, the modifications reduced the NO emissions by approximately 23%, as indicated by a comparison of the data obtained before and after the modifications. Thus, the combined application of burner and furnace air-staged combustions facilitated NO-emission reduction.

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