Nitric Oxide Absorption from Flue Gas with Cumene Hydroperoxide Solution PDF Download
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Author: Chung-Der Chen
Publisher:
ISBN:
Category : Cumene hydroperoxide
Languages : en
Pages : 0
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Author: Chung-Der Chen
Publisher:
ISBN:
Category : Cumene hydroperoxide
Languages : en
Pages : 0
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Author: Wanna Lolertpiphop
Publisher:
ISBN:
Category : Flue gases
Languages : en
Pages : 152
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The use of sodium chlorite (NaClO2) and alkaline aqueous cumene hydroperoxide (CHP) as oxidizing agents to promote the absorption of nitric oxide from flue gases was investigated in a semicontinuous bubbling scrubber. The efficiency of the scrubbing solutions to remove nitric oxide was evaluated as a function of operating conditions such as pH, concentration of the oxidants, residence time, temperature, flue gas compositions. Under acid conditions, sodium chlorite can stoichiometrically react and absorb 99.5% NO and 80% SO2 in the same scrubber with 0,672 M NaClO2 in buffered solution at pH 6, and 0.3 M NaOH. During the reaction, nitric oxide was oxidized to nitrates and nitrites and sulfur dioxide to sulfates. Consequently, sodium chlorite can be used to control NO as well as SO2. However, the parasitic effect Of SO2 in consuming the reactant results in a relatively high operating cost. On the other hand, organic cumene hydroperoxide scrubbing solution has been found to operate under high alkalinity to control nitric oxide. The hydroperoxide used in this study was less expensive than sodium chlorite system and commercially available. The removal of 92% nitric oxide was achieved at 94° C, 1.531 min residence time (scrubber contains 1.49 dm3 solution and flue gas is bubbled at 0.94 dm3 /min), with 0.12 M cumene hydroperoxide and 0.1 M potassium hydroxide. The major products obtained from the NO oxidation by alkaline cumene hyddroperoxide are NO2- and NO3- and cumyl alcohol. Other products such as acetophenone and cc-methyl styrene are observed as a result of the decomposition of the reactant and intermediates.
Author: Chen-Lu Yang
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 172
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The use of chlorine (Cl), sodium hypochlorite (NaClO), and sodium chlorite (NaClO) as oxidizing agents to promote the absorption of nitric oxide (NO) from gas streams has been investigated in the Gas Scrubbing Laboratory of New Jersey Institute of Technology since 1988. The first step of this project had been to screen out the best scrubbing medium for nitric oxide removal from flue gases. The most successful oxidizing agent was found to be sodium chlorite in acidic aqueous solution. The screening results have been accepted for publication in Chemical Engineering Communications. A sodium chlorite containing aqueous acid solution quantitatively absorbs nitric oxide in a 5.1 cm in diameter by 61 cm long bubble column scrubber. Under the same conditions, 90% removal were achieved with either chlorine gas or sodium hypochlorite aqueous scrubbing. An analytical instrument train, consisting of a Thermoelectron model 10A NO[x] analyzer, Beckman model 715 process oxygen monitor, and Rosemount model 890 UV SO analyzer, was set up to measure the concentration changes of inlet and outlet flue gas components. A preparatory liquid chromatography equipped with UV/Visible range photodiode array detector was set up for scrubbing solution real time monitoring of oxychlorinated compounds. Chlorine dioxide was found to be the active ingredient in the sodium chlorite aqueous scrubbing, while hypochlorous acid was the key oxidant for both chlorine and sodium hypochlorite scrubbing processes. During the operation, nitric oxide was oxidized to nitrate ion and sulfur dioxide to sulfate ion and were collected in the scrubbing solutions. At the same time, oxychlorine compounds were reduced to chloride ion, which was analyzed by ion chromatography. To obtain the reaction rate of nitric oxide with sodium chlorite aqueous solution for process design consideration, a droplet surface reaction model was derived to correlate experimental data from spray tower scrubber. The model predicted conversion of NO very well but not absorption because the model does not predict breakthrough of nitrogen dioxide (NO). Therefore, a model of absorption with chemical reaction was used to study the absorption of NO in a packed bed scrubber to determine the feasibility of controlling all air pollutants in one scrubber. In the model, theoretical height of transfer unit (HTU) was used to evaluate the efficiency of scrubbing solutions. The influence of different variables such as temperature, pH, gas stream flow rate, concentration of sodium chlorite, and other components in the flue gas on height of transfer unit was evaluated.
Author: Hesheng Yu
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Wade H. Shafer
Publisher: Springer Science & Business Media
ISBN: 1461303931
Category : Science
Languages : en
Pages : 427
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Book Description
Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS)* at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dis semination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volumes were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 39 (thesis year 1994) a total of 13,953 thesis titles from 21 Canadian and 159 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this impor tant annual reference work. While Volume 39 reports theses submitted in 1994, on occasion, certain uni versities do report theses submitted in previous years but not reported at the time.
Author: Sade H Shafer
Publisher: Springer Science & Business Media
ISBN:
Category : Education
Languages : en
Pages : 440
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Cited in Sheehy, Chen, and Hurt . Volume 38 (thesis year 1993) reports a total of 13,787 thesis titles from 22 Canadian and 164 US universities. As in previous volumes, thesis titles are arranged by discipline and by university within each discipline. Any accredited university or college with a grad
Author: U.S. Department of Transportation
Publisher: Simon and Schuster
ISBN: 1626363765
Category : House & Home
Languages : en
Pages : 352
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Does the identification number 60 indicate a toxic substance or a flammable solid, in the molten state at an elevated temperature? Does the identification number 1035 indicate ethane or butane? What is the difference between natural gas transmission pipelines and natural gas distribution pipelines? If you came upon an overturned truck on the highway that was leaking, would you be able to identify if it was hazardous and know what steps to take? Questions like these and more are answered in the Emergency Response Guidebook. Learn how to identify symbols for and vehicles carrying toxic, flammable, explosive, radioactive, or otherwise harmful substances and how to respond once an incident involving those substances has been identified. Always be prepared in situations that are unfamiliar and dangerous and know how to rectify them. Keeping this guide around at all times will ensure that, if you were to come upon a transportation situation involving hazardous substances or dangerous goods, you will be able to help keep others and yourself out of danger. With color-coded pages for quick and easy reference, this is the official manual used by first responders in the United States and Canada for transportation incidents involving dangerous goods or hazardous materials.
Author:
Publisher:
ISBN:
Category : Chemistry, Technical
Languages : en
Pages : 748
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Author:
Publisher:
ISBN:
Category : Chemical engineering
Languages : en
Pages : 786
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Author:
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 2626
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