Achievement of high CO2 concentration in the flue gas at slightly positive pressure during oxy-coal combustion in a 300kWth furnace

Fuel ◽  
2015 ◽  
Vol 160 ◽  
pp. 434-439 ◽  
Author(s):  
Chung-Cheng Chi ◽  
Ta-Hui Lin ◽  
Wei-Cheng Huang ◽  
Shuhn-Shyurng Hou ◽  
Pai-Yi Wang
Keyword(s):  
Flue Gas ◽  
Coal Combustion ◽  
Co2 Concentration ◽  
Positive Pressure ◽  
High Co2 ◽  
High Co2 Concentration

The Characteristics of Recycled-NO Reduction in O2/CO2 Coal Combustion

2011 ◽  
Author(s):  
Takashi Marumo ◽  
Jun-ichiro Yamamoto ◽  
Hirotatsu Watanabe ◽  
Ken Okazaki
Keyword(s):  
Coal Combustion ◽  
No Reduction ◽  
Co2 Concentration ◽  
Oh Radical ◽  
Combustion System ◽  
High Co2 ◽  
High Co2 Concentration ◽  
Co2 Recovery ◽  
Low Nox Emission ◽  
Very High

O2/CO2 coal combustion is a promising technology for easy CO2 recovery and low NOx emission. O2/CO2 coal combustion system has very high CO2 concentration, and so O2/CO2 ratio is very important parameter in this system. In this study, the effect of CO2 concentration on recycled NO reduction was investigated experimentally and numerically. It was revealed that the recycled NO reduction ratio was increased with decreasing CO2 concentration. This was because high CO2 concentration enhanced the reaction to produce OH radical (CO2 + H → CO + OH). Both calculations and experiments showed OH radical increased with an increase in CO2 concentration. However, increasing OH radical enhanced the consumption of H2 which is needed for the reduction of secondary NO. It was shown that high CO2 concentration inhibits recycled-NO reduction from the new point of CO2 reactivity.

scholarly journals DEGRADATION OF AMINE SOLVENTS USED FOR CO2 REMOVAL FROM FLUE GAS WITH HIGH CO2 CONCENTRATION

2021 ◽  
Vol 14 (1) ◽  
pp. 115-124
Author(s):  
Andrzej WILK ◽  
Tomasz SPIETZ ◽  
Lucyna WIĘCŁAW-SOLNY ◽  
Aleksander KRÓTKI ◽  
Justyna TARNOWSKA
Keyword(s):  
Flue Gas ◽  
Co2 Concentration ◽  
Co2 Removal ◽  
High Co2 ◽  
High Co2 Concentration

Experimental and kinetic study of NO-reburning by syngas under high CO2 concentration in a jet stirred reactor

Fuel ◽  
2021 ◽  
Vol 304 ◽  
pp. 121403
Author(s):  
Fan Hu ◽  
Pengfei Li ◽  
Wenhao Li ◽  
Cuijiao Ding ◽  
Junjun Guo ◽  
...  
Keyword(s):  
Kinetic Study ◽  
Co2 Concentration ◽  
High Co2 ◽  
Stirred Reactor ◽  
High Co2 Concentration

scholarly journals Development of experimental structure and influence of high CO2 concentration in maize cro

2012 ◽  
Vol 32 (2) ◽  
pp. 306-314 ◽  
Author(s):  
João B. Lopes da Silva ◽  
Paulo A. Ferreira ◽  
Eduardo G. Pereira ◽  
Luís C. Costa ◽  
Glauco V. Miranda
Keyword(s):  
Experimental Design ◽  
Dry Matter ◽  
Co2 Concentration ◽  
Dry Mass ◽  
C4 Plant ◽  
Active Radiation ◽  
High Co2 ◽  
Photosynthetic Rates ◽  
High Co2 Concentration ◽  
Experimental Structure

Maize is a C4 plant that shows few or no response to high [CO2]. Thus, this study aimed to analyze the photosynthetic rate and yield of maize under high [CO2] and develop open-top chambers (OTC) to create an atmosphere enriched with CO2. The experiment was conducted between October 2008 and March 2009. The OTCs were developed in modular scheme. Measurement of photosynthetic rates, transpiration, stomata conductance, grain yield and dry matter were performed. The experimental design was randomized blocks with four replications and three treatments: P1 - plants grown in OTC with 700 ppm [CO2], P2 - plants grown in OTC with environmental [CO2], and P3 - control, cultivated in open field. The results were analyzed by ANOVA and Tukey's test (Pr< 0.05). The chambers can reduce by 25% the photosynthetically active radiation and increase the air and leaf temperatures. Plants under high [CO2] (P1) showed the highest photosynthetic rates and the lowest stomata conductance and transpiration. The total weight of grains (g) and dry mass of shoots (g) showed no increases for P1, despite their higher photosynthetic rates.

scholarly journals Simulating the Use of a Smelter Off-Gas in the Precipitation Stage of the Pedersen Process

2021 ◽  
Vol 5 (1) ◽  
pp. 53
Author(s):  
Andriani Manataki ◽  
James M. Mwase ◽  
Casper van der Eijk
Keyword(s):  
Production Process ◽  
Experimental Work ◽  
Co2 Concentration ◽  
Hydrometallurgical Process ◽  
Alumina Production ◽  
High Co2 ◽  
Aluminum Hydroxides ◽  
High Co2 Concentration

The Pedersen process is an alumina production process, which combines pyrometallurgical and hydrometallurgical methods. In the pyrometallurgical stage, limestone is calcined and CO2 is generated. This off-gas can be captured with a high CO2 concentration. At the end of the hydrometallurgical process, aluminum hydroxides, like bayerite, are precipitated using CO2. In this paper, experimental work on precipitation of aluminum hydroxides through the addition of a mixture of CO2, O2 and N2 is presented. The parameters varied, as were the percentages of each gas and the temperature. The indicators measured were the time until the beginning of precipitation and the time that the precipitation lasts. These tests simulate the use of a smelter furnace off-gas in the precipitation stage of the Pedersen process and have shown promising results.

Reburning study of superfine pulverized coal in high CO2 concentration

Fuel ◽  
2018 ◽  
Vol 220 ◽  
pp. 25-31 ◽  
Author(s):  
Junfang Ma ◽  
Jun Shen ◽  
Jiaxun Liu ◽  
Yang Ma ◽  
Xiumin Jiang
Keyword(s):  
Co2 Concentration ◽  
Pulverized Coal ◽  
High Co2 ◽  
High Co2 Concentration
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