Oxidative decomposition properties of cationic exchange resins producing SO42− in power plants

2015 ◽  
Vol 71 (10) ◽  
pp. 1478-1484
Author(s):  
Zhiping Zhu ◽  
Chenlin Dai ◽  
Sen Liu ◽  
Ye Tian
Keyword(s):  
Data Analysis ◽  
Organic Carbon ◽  
Power Plants ◽  
Strong Acid ◽  
Residual Chlorine ◽  
Sulphate Content ◽  
Cationic Exchange ◽  
Exchange Resins ◽  
Dynamic Cycle ◽  
Decomposition Properties

The sulphate content of a system increases when strong-acid cationic exchange resins leak into a system or when sulphonic acid groups on the resin organic chain detach. To solve this problem, a dynamic cycle method was used in dissolution experiments of several resins under H2O2 or residual chlorine conditions. Results show that after performing dynamic cycle experiments for 120 hours under oxidizing environments, the SO42− and total organic carbon (TOC) released by four kinds of resins increased with time, contrary to their release velocity. The quantity of released SO42− increased as the oxidizing ability of oxidants was enhanced. Results showed that the quantity and velocity of released SO42− under residual chlorine condition were larger than those under H2O2 condition. Data analysis of SO42− and TOC released from the four kinds of resins by the dynamic cycle experiment revealed that the strength of oxidation resistance of the four resins were as follows: 650C > 1500H > S200 > SP112H.

Sulfate ion (SO42−) release from old and new cation exchange resins used in condensate polishing systems for power plants

2014 ◽  
Vol 70 (7) ◽  
pp. 1188-1194 ◽  
Author(s):  
Zhi-ping Zhu ◽  
Xue-ying Tang ◽  
Zhao-hui Yin ◽  
Wei-wei Yu
Keyword(s):  
Cation Exchange ◽  
Power Plants ◽  
Sulfate Ion ◽  
Immersion Method ◽  
Cation Exchange Resins ◽  
Pyrolysis Experiment ◽  
Exchange Resins ◽  
Short Time ◽  
Dynamic Cycle ◽  
Static Immersion

In this study, a dynamic cycle test, a static immersion method and a pyrolysis experiment were combined to examine the characteristics of SO42− released from several new and old cation exchange resins used in condensate polishing systems for power plants. The results show that the quantity and velocity of SO42− released from new and old resins tend to balance in a short time during the dynamic cycle experiment. SO42− is released by 1500H (monosphere super gel type cation exchange resins) and 001 × 7 (gel type cation exchange resins) new and old cation exchange resins, the quantity of which increases according to immersion time. In the pyrolysis experiment, the quantity of SO42− released from resins increases and the pH of the pyrolysis solution transforms from alkaline to acidic with an increase in temperature.

scholarly journals Leachables from Strong Acid Cation Exchange Resins

1988 ◽  
Vol 37 (12) ◽  
pp. 1114-1121 ◽  
Author(s):  
Wataru AGUI ◽  
Masahito TAKEUCHI ◽  
Masahiko ABE ◽  
Keizo OGINO
Keyword(s):  
Cation Exchange ◽  
Strong Acid ◽  
Cation Exchange Resins ◽  
Acid Cation ◽  
Exchange Resins

scholarly journals Quantifying primary and secondary humic-like substances in urban aerosol based on emission source characterization and a source-oriented air quality model

2018 ◽  
Author(s):  
Xinghua Li ◽  
Junzan Han ◽  
Philip K. Hopke ◽  
Jingnan Hu ◽  
Qi Shu ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Biomass Burning ◽  
Coal Combustion ◽  
Power Plants ◽  
Water Soluble ◽  
Aerosol Formation ◽  
Source Characterization ◽  
Air Quality Model ◽  
Coal Burning ◽  
Residential Coal

Abstract. Humic-like substances (HULIS) are a mixture of high molecular weight, water-soluble organic compounds that are widely distributed in atmospheric aerosol. Their sources are rarely studied quantitatively. Biomass burning is generally accepted as a major primary source of ambient humic-like substances (HULIS) with additional secondary material formed in the atmosphere. However, the present study provides direct evidence that residential coal burning is also a significant source of ambient HULIS, especially in the heating season in northern China based on source measurements, ambient sampling and analysis, and apportionment with source-oriented CMAQ modeling. Emissions tests show that residential coal combustion produces 5 to 24 % of the emitted organic carbon (OC) as HULIS carbon (HULISc). Estimation of primary emissions of HULIS in Beijing indicated that residential biofuel and coal burning contribute about 70 % and 25 % of annual primary HULIS, respectively. Vehicle exhaust, industry, and power plants contributions are negligible. Average concentration of ambient HULIS was 7.5 μg/m3 in atmospheric PM2.5 in urban Beijing and HULIS exhibited obvious seasonal variations with the highest concentrations in winter. HULISc account for 7.2 % of PM2.5 mass, 24.5 % of OC, and 59.5 % of water-soluble organic carbon, respectively. HULIS are found to correlate well with K+, Cl−, sulfate, and secondary organic aerosol suggesting its sources include biomass burning, coal combustion and secondary aerosol formation. Source apportionment based on CMAQ modeling shows residential biofuel and coal burning, secondary formation are important annual sources of ambient HULIS, contributing 57.5 %, 12.3 %, and 25.8 %, respectively.

scholarly journals Analisis Pengaruh Perubahan Beban Generator Terhadap Efsiensi Kinerja PLTU Bosowa Energi Jeneponto Unit 2

2021 ◽  
Vol 18 (2) ◽  
pp. 241
Author(s):  
Andreas Pangkung ◽  
Herman Nawir ◽  
Aditya Nugraha Adji Santoso
Keyword(s):  
Data Analysis ◽  
Data Collection ◽  
Fuel Consumption ◽  
Power Output ◽  
Power Plants ◽  
Calorific Value ◽  
Input Power ◽  
Steam Power ◽  
Steam Power Plants ◽  
Efficiency Performance

This study aims to determine the effect of changes in generator load on efficiency performance in steam power plants and to determine the amount of input power in the boiler. Data collection was carried out at PT. Bosowa Energi PLTU Jeneponto. The data are the power output, fuel consumption, and the calorific value of the fuel. Then perform data analysis by calculating input power and efficiency. From the result of the study, the highest efficiency is on May 20, 2018 at 18.00 with a load of 90.00 MW, namely 55.68% and the lowest efficiency is on May 12, 2018 at 03.00 with a load of 64.98 MW, namely 22.69%. The highest boiler input power based on the analysis results was on May 3, 2018 at 20.00, namely 356.61 MW, and the lowest boiler input power based on the analysis was on May 15, 2018 at 07.00, namely 128.14 MW.

scholarly journals A kinetic evaluation on no2 formation in the post-flame region of pressurized oxy-combustion process

2020 ◽  
pp. 236-236
Author(s):  
Xuebin Wang ◽  
Gaofeng Dai ◽  
Gregory Yablonsk ◽  
Milan Vujanovic ◽  
Richard Axelbaum
Keyword(s):  
Power Plants ◽  
Combustion Process ◽  
Strong Acid ◽  
Dew Point ◽  
Kinetic Evaluation ◽  
Atmospheric Air ◽  
Energy Penalty ◽  
Flame Region ◽  
No2 Formation ◽  
Time Required

Pressurized oxy-combustion is a promising technology that can significantly reduce the energy penalty associated with first generation oxy-combustion for CO2 capture in coal-fired power plants. However, higher pressure enhances the production of strong acid gases, including NO2 and SO3, aggravating the corrosion threat during flue gas recirculation. In the flame region, high temperature NOx exists mainly as NO, while conversion from NO to NO2 happened in post-flame region. In this study, the conversion of NO ? NO2 has been kinetically evaluated under representative post-flame conditions of pressurized oxy-combustion after validating the mechanism (80 species and 464 reactions), which includes nitrogen and sulfur chemistry based on GRI-Mech 3.0. The effects of residence time, temperature, pressure, major species (O2/H2O), and minor or trace species (CO/SOx) on NO2 formation are studied. The calculation results show that when pressure is increased from 1 to 15 bar, NO2 is increased from 1 to 60 ppm, and the acid dew point increases by over 80?C. Higher pressure and temperature greatly reduce the time required to reach equilibrium, e.g., at 15 bar and 1300?C, equilibrium is reached in 1 millisecond and the NO2/NO is about 0.8%. The formation and destruction of NO2 is generally through the reversible reactions: NO+O+M=NO2+M, HO2+NO=NO2+OH, and NO+O2=NO2+O. With increasing pressure and decreasing temperature, O plays a much more important role than HO2 in the oxidation of NO. A higher water vapor content accelerates NO2 formation in all cases by providing more O and HO2 radicals. The addition of CO or SO2 also promotes the formation of NO2. Finally, NO2 formation in a Pressurized oxy-combustion furnace is compared with that in a practical atmospheric air-combustion furnace and the comparison show that NO2 formation in a Pressurized oxy-combustion furnace can be over 10 times that of an atmospheric air-combustion furnace.

Data Analysis for Supporting Cleaning Schedule of Photovoltaic Power Plants

2021 ◽  
pp. 643-648
Author(s):  
Chung-Chian Hsu ◽  
Shi-Mai Fang ◽  
Yu-Sheng Chen ◽  
Arthur Chang
Keyword(s):  
Data Analysis ◽  
Power Plants ◽  
Photovoltaic Power
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