Removal Of Carbon Monoxide Research Articles

Evidence for two temperature régimes in the slow oxidation of methane

The kinetics of the slow oxidation of methane have been studied using a technique such that the partial pressures of methane and oxygen—and in many experiments, carbon monoxide as well—were followed throughout the course of the reaction. The dependences of the rate of the disappearance of methane upon the sum of the pressures with or without diluents, upon the injection of formaldehyde into a reacting methaneoxygen mixture, and upon the removal of carbon monoxide from the reaction mixture have been determined directly for the first time. The results of these experiments indicate that: 1. (1) When carbon monoxide accumulates in the slow oxidation of methane at the temperatures used here, it retards the rate of disappearance of methane. When it is removed, the rate of disappearance of methane remains constant throughout 70 to 80 per cent of the reaction indicating that the rate is an apparent zero order reaction. 2. (2) Below the range of about 416° to 430°C, the rate depends only upon the initial pressures of methane and oxygen and is not affected by the total pressure, by diluents, or by the injection of nearly equi-molar amounts of formaldehyde. The rate can be expressed by the relation: − d (CH 4) dt =Ae − 30200 RT (CH 4 0) 2(O 2 0) 3. (3) Above about 430°C, diluents and formaldehyde accelerate the rate of the reaction. The rate is higher than predicted from the above expression and it appears that an additional branched chain(s) may be developed at these higher temperatures. 4. (4) The present evidence suggests that formaldehyde is not the rate-controlling intermediate at low temperatures but that it may serve as an additional chain branching agent at the higher temperatures.

Correction - "Removing Carbon Monoxide from Ammonia Synthesis Gas"

Correction - "Removing Carbon Monoxide from Ammonia Synthesis Gas"

Removing Carbon Monoxide from Ammonia Synthesis Gas

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRemoving Carbon Monoxide from Ammonia Synthesis GasHolger C. Andersen and William J. GreenCite this: Ind. Eng. Chem. 1961, 53, 8, 645–646Publication Date (Print):August 1, 1961Publication History Published online1 May 2002Published inissue 1 August 1961https://doi.org/10.1021/ie50620a027RIGHTS & PERMISSIONSArticle Views154Altmetric-Citations4LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (235 KB) Get e-Alerts

The application of the copper oxide‐alumina catalyst for air pollution control

AbstractThe catalytic combustion of 1‐hexene present in diluent nitrogen in the concentrations of 1170 p.p.m. and 3000 p.p.m. by excess oxygen, has been studied in the presence of the CuO‐Al2O3 (1:1) catalyst in the temperature range 242° to 424°C. and gas space velocity in the range 4000–16,000 hr.−1. The experimental data on the kinetics of the reaction were found to fit an empirical half‐order law with respect to the 1‐hexene concentration. The presence of water vapor in the reactants was found to have no effect on the efficiency of the catalyst at temperatures higher than 400°C. The above results were similar to those obtained for the catalytic oxidation of n‐hexane studied earlier.The possible use of the above copper oxide‐alumina catalyst for the simultaneous removal of hydrocarbons and carbon monoxide present in the auto exhaust gases has been tested, making use of a 1955 six‐cylinder Chevrolet engine run on leaded gasoline fuel. The hydrocarbon and carbon monoxide concentrations encountered in these studies varied in the range 170–16,000 p.p.m. and 1–7% respectively. It was found that the minimum initial temperature of the catalyst bed required for the complete removal of both hydrocarbons and carbon monoxide, simultaneously, was 226°C. under no load condition, 342°C. under an engine load of 2.5 h.p., 400°C. under an engine load of 5.1 h.p. or higher, and 236°C. under deceleration conditions. The catalyst showed no deterioration in performance even after 100 hours of continuous service in conjunction with the above auto exhaust gases.

Purification of Gases for Ammonia Manufacture - Removal of Carbon Monoxide by Cuprammonium Carbonate Solutions

Purification of Gases for Ammonia Manufacture - Removal of Carbon Monoxide by Cuprammonium Carbonate Solutions

The Removal of Carbon Monoxide from Air.

The Removal of Carbon Monoxide from Air.