scholarly journals Pilot-Scale Experimental Study on Impacts of Biomass Cofiring Methods to NOx Emission from Pulverized Coal Boilers—Part 2: NOx Reduction Capability through Reburning versus Cofiring

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6552
Author(s):  
Taeyoung Chae ◽  
Jaewook Lee ◽  
Yongwoon Lee ◽  
Won Yang ◽  
Changkook Ryu
Keyword(s):  
Nox Reduction ◽  
Pilot Scale ◽  
Empty Fruit Bunch ◽  
Thermal Unit ◽  
Wood Pellet ◽  
Nox Abatement ◽  
Torrefied Biomass ◽  
Fuel Characteristics ◽  
Consistent Basis ◽  
Reduction Effectiveness

In this study the NOx reduction capability of reburning three biomasses (i.e., wood pellet, torrefied biomass, and empty fruit bunch) via 12 cases (i.e., four reburning ratios for every biomass) is investigated in a 1 MWth-scale pilot-scale furnace. These reburning cases are compared with 12 cofiring cases presented in the Part 1 paper on a consistent basis. It is found that, for every cost to purchase and prepare biomass, reburning technology provides significantly better NOx abatement performance than cofiring (up to 3.4 times). NOx reduction effectiveness as high as 4.9 could be achieved by reburning, which means the percent of NOx abatement could be 4.9 times higher than the percent of reburning ratio. It is found that the highest NOx reduction per thermal unit of biomass happens at the lowest reburning ratio, and increasing the reburning ratio leads to a reduction in NOx abatement effectiveness in an exponential decay manner. Unlike cofiring technology, reburning was found to have little dependence on the fuel characteristics, such as fuel ratio or fuel-N, when it comes to NOx abatement potential.

scholarly journals Effect of Hydrothermal Treatment on Grindability and Fuel Characteristics of Empty Fruit Bunch Derived Hydrochar

2018 ◽  
Vol 9 (6) ◽  
pp. 1246 ◽  
Author(s):  
Sirawasith Ruksathamcharoen ◽  
Muhammad W Ajiwibowo ◽  
Teerapong Chuenyam ◽  
Adi Surjosatyo ◽  
Kunio Yoshikawa
Keyword(s):  
Hydrothermal Treatment ◽  
Empty Fruit Bunch ◽  
Fuel Characteristics

scholarly journals Green Waste/Wood Pellet Pyrolysis in a Pilot-Scale Rotary Kiln: Effect of Temperature on Product Distribution and Characteristics

2020 ◽  
Vol 34 (3) ◽  
pp. 3336-3345
Author(s):  
Tchini Séverin Tanoh ◽  
Amina Ait Oumeziane ◽  
Jérôme Lemonon ◽  
Francisco Javier Escudero Sanz ◽  
Sylvain Salvador
Keyword(s):  
Rotary Kiln ◽  
Product Distribution ◽  
Pilot Scale ◽  
Effect Of Temperature ◽  
Wood Pellet ◽  
Waste Wood ◽  
Green Waste

NOx abatement by fuel-lean reburning: Laboratory combustor and pilot-scale package boiler results

1998 ◽  
Vol 27 (2) ◽  
pp. 3189-3195 ◽  
Author(s):  
C. Andrew Miller ◽  
A. Dahman Touati ◽  
Julian Becker ◽  
Jost O.L. Wendt
Keyword(s):  
Pilot Scale ◽  
Nox Abatement

scholarly journals Torrefied Biomass Gasification: A Simulation Study by Using Empty Fruit Bunch

2017 ◽  
Vol 131 ◽  
pp. 03008 ◽  
Author(s):  
Muhammad Bilal Muslim ◽  
Suriyati Saleh ◽  
Noor Asma Fazli Abdul Samad
Keyword(s):  
Simulation Study ◽  
Biomass Gasification ◽  
Empty Fruit Bunch ◽  
Torrefied Biomass

NOx reduction by hydrazine in a pilot-scale reactor

1998 ◽  
Vol 69 (2) ◽  
pp. 99-104 ◽  
Author(s):  
Jung Bin Lee ◽  
Sang Done Kim
Keyword(s):  
Nox Reduction ◽  
Pilot Scale ◽  
Pilot Scale Reactor ◽  
Scale Reactor

Fuel Oil Reburning Application for NOx Control to Firetube Package Boilers

1987 ◽  
Vol 109 (2) ◽  
pp. 207-214 ◽  
Author(s):  
J. A. Mulholland ◽  
R. E. Hall
Keyword(s):  
Natural Gas ◽  
Nitrogen Content ◽  
Nox Reduction ◽  
Pilot Scale ◽  
Fuel Oil ◽  
Limiting Factor ◽  
Boiler Load ◽  
Residual Fuel Oil ◽  
Nox Control ◽  
Percent Nitrogen

Two pilot-scale (0.73 MW or 2.5 × 106 Btu/hr) firetube package boilers were retrofitted for fuel oil reburning application for NOx emission control. When firing distillate fuel oil (0.01 percent nitrogen content), an overall NOx reduction of 46 percent from an uncontrolled emission of 125 ppm (dry, at zero percent O2) was realized by diverting 20 percent of the total boiler load to a second stage burner; a 51 percent NOx reduction from 265 ppm was achieved in a distillate/residual fuel oil mixture (0.14 percent nitrogen content) reburning application. Nitrogen-free fuel oil reburning was found to be slightly more effective at reducing NOx than was natural gas reburning, although longer fuel-rich zone residence times were required to allow for evaporation and mixing of the fuel oil droplets. Key parameters investigated which impact the reburning process were: primary flame NOx, reburn zone stoichiometry, and reburn zone residence time. Reburning applied to firetube package boilers requires minimal facility modification. Reburning can be coupled with other NOx control techniques (e.g., distributed air low NOx burners) to achieve NOx emissions of less than 100 ppm. However, for very low primary flame NOx conditions (i.e., less than 200 ppm), reburning fuel nitrogen content is a limiting factor, and reburning with a low-nitrogen-content fuel, such as natural gas or nitrogen-free distillate oil, may be necessary to achieve 50 percent NOx reduction.

scholarly journals Non-catalytic NOx reduction for marine Diesel engine: an experimental approach

2021 ◽  
Vol 312 ◽  
pp. 07015
Author(s):  
Anna Maria Raspolli Galletti ◽  
Stefano Frigo ◽  
Marco Antonelli ◽  
Gianluca Pasini ◽  
Paolo Bertetti ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Diesel Engines ◽  
Nox Reduction ◽  
Air Pollutant ◽  
Department Of Energy ◽  
Pollutant Emissions ◽  
Nox Abatement ◽  
Experimental Apparatus ◽  
First Results ◽  
The University

Recent legislation concerning air pollutant emissions from ships (Tier III) has considerably decreased NOx emission limits for recreational ships with less than 500 gross tonnages and greater than 24 m load line length (LLL), the so-called “large yachts”. For these yachts, which adopt multiple Diesel engines with maximum power ranging from 800 to 2000 kW, the new NOx limit is less than 2 g/kWh. To satisfy that limit, engine makers suggest the adoption of a classic SCR system with urea injection but this methodology, in addition to requiring a large space for installation, does not seem so appropriate for diesel engines of large yachts that normally operate at low power with exhaust temperatures often well below 300 °C, therefore not sufficient to allow the correct functioning of the SCR. The aforementioned circumstances have prompted Sanlorenzo Spa (La Spezia – Italy), one of the world’s leading companies in the production of pleasure boats, to collaborate with the University of Pisa in the study of alternative solutions to SCR systems. Recently there is a great interest in innovative NOx abatement systems, based on the possibility of absorbing NOx molecules into seawater through the utilization of appropriate aqueous solutions containing targeted saline oxidizing agents. The present study describes the first results of a research program aimed to identify, from one side, the best saline oxidizing agent for an aqueous NOx abatement and, from the other, the best washing methodology compatible with the propulsion layouts usually adopted on yachts. In the engine testing laboratories of the Department of Energy, Systems, Territory and Construction Engineering (DESTeC) of the University of Pisa, an experimental apparatus has been created to reproduce the real conditions of underwater engine exhausting. This device was combined with a small 1.2 L direct injection diesel engine. The first results showed a reduction of the NOx emissions of about 27% by using a gas washing with wet scrubber, followed by bubbling in water, using 0.2 molar NaClO saline solutions.

NOx abatement from stationary emission sources by photo-assisted SCR: Lab-scale to pilot-scale studies

2016 ◽  
Vol 523 ◽  
pp. 294-303 ◽  
Author(s):  
Joseph C.C. Yu ◽  
Van-Huy Nguyen ◽  
Janusz Lasek ◽  
Sheng-Wei Chiang ◽  
Duan Xing Li ◽  
...  
Keyword(s):  
Pilot Scale ◽  
Emission Sources ◽  
Nox Abatement
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