Determination of sulphur trioxide and sulphuric acid in flue gases in presence of oxygen, carbon dioxide, sulphur dioxide and nitric oxides

1978 ◽  
Vol 289 (2) ◽  
pp. 110-110 ◽  
Author(s):  
Jorma Kinnunen ◽  
Bertil Wennerstrand
Keyword(s):  
Carbon Dioxide ◽  
Sulphuric Acid ◽  
Sulphur Dioxide ◽  
Flue Gases ◽  
Nitric Oxides ◽  
Sulphur Trioxide

scholarly journals Modelling and Multi-Objective Optimization of the Sulphur Dioxide Oxidation Process

Processes ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 1072
Author(s):  
Mohammad Reza Zaker ◽  
Clémence Fauteux-Lefebvre ◽  
Jules Thibault
Keyword(s):  
Sulphuric Acid ◽  
Sulphur Dioxide ◽  
Variable Number ◽  
Inlet Temperature ◽  
Multi Objective Optimization ◽  
Absorption Column ◽  
Maximum Reaction Rate ◽  
Multi Objective ◽  
Maximum Reaction

Sulphuric acid (H2SO4) is one of the most produced chemicals in the world. The critical step of the sulphuric acid production is the oxidation of sulphur dioxide (SO2) to sulphur trioxide (SO3) which takes place in a multi catalytic bed reactor. In this study, a representative kinetic rate equation was rigorously selected to develop a mathematical model to perform the multi-objective optimization (MOO) of the reactor. The objectives of the MOO were the SO2 conversion, SO3 productivity, and catalyst weight, whereas the decisions variables were the inlet temperature and the length of each catalytic bed. MOO studies were performed for various design scenarios involving a variable number of catalytic beds and different reactor configurations. The MOO process was mainly comprised of two steps: (1) the determination of Pareto domain via the determination a large number of non-dominated solutions, and (2) the ranking of the Pareto-optimal solutions based on preferences of a decision maker. Results show that a reactor comprised of four catalytic beds with an intermediate absorption column provides higher SO2 conversion, marginally superior to four catalytic beds without an intermediate SO3 absorption column. Both scenarios are close to the ideal optimum, where the reactor temperature would be adjusted to always be at the maximum reaction rate. Results clearly highlight the compromise existing between conversion, productivity and catalyst weight.

scholarly journals Spectrophotometric determination of carbon dioxide and sulphur dioxide in wines by flow injection

Analusis ◽  
2000 ◽  
Vol 28 (1) ◽  
pp. 77-82 ◽  
Author(s):  
G. T. Atanassov ◽  
R. C. Lima ◽  
R. B.R. Mesquita ◽  
A. O.S.S. Rangel ◽  
I. V. Tóth
Keyword(s):  
Carbon Dioxide ◽  
Spectrophotometric Determination ◽  
Flow Injection ◽  
Sulphur Dioxide

AMS-14C Determination of the Biogenic-Fossil Fractions in Flue Gases

Radiocarbon ◽  
2018 ◽  
Vol 60 (5) ◽  
pp. 1327-1333 ◽  
Author(s):  
Gianluca Quarta ◽  
Lucio Calcagnile ◽  
Domenico Cipriano ◽  
Marisa D’Elia ◽  
Lucio Maruccio ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Greenhouse Gas ◽  
Carbon Dioxide Emissions ◽  
Flue Gases ◽  
Relevant Aspect ◽  
Biogenic Carbon ◽  
Synthetic Gas ◽  
Stationary Sources ◽  
Critical Aspects

ABSTRACTThe determination of the proportion between the biogenic and the fossil-derived fraction in carbon dioxide emissions from industrial stationary sources is a relevant aspect in the frame of the worldwide efforts to reduce greenhouse gas emissions into the atmosphere. In this field the 14C-based method has gained importance over the years and has been included in standard protocols accepted at both the national and international levels. The advantages of the method, based on the large difference in terms of 14C signature between fossil and biogenic carbon, are reviewed as well as some critical aspects related to its application. In particular the results of a study aimed at validating the method by analyzing synthetic gas mixtures produced in a dedicated plant and with a tuneable proportion between fossil and biogenic carbon dioxide are presented.

Causes of Flue Gas Deposits and Corrosion in Modern Boiler Plants

1949 ◽  
Vol 160 (1) ◽  
pp. 359-379 ◽  
Author(s):  
W. F. Harlow
Keyword(s):  
Sulphuric Acid ◽  
Flue Gas ◽  
High Surface ◽  
Research Work ◽  
Heating Surface ◽  
Dew Point ◽  
Flue Gases ◽  
Inert Gases ◽  
Pulverized Fuel ◽  
Sulphur Trioxide

This paper is intended to be an amplification and continuation of the author's previous paper entitled “Causes of High Dew-point Temperatures in Boiler Flue Gases” read before the Institution in 1943, in which attention was drawn to the phenomenon of the catalytic production of sulphuric acid in flue gases by their passage over heated iron surfaces. At that time the full importance of these findings was not apparent, but evidence is now submitted to show that, in addition to causing deposits and corrosion by the deposition of acid in air heaters and economizers, this phenomenon is primarily responsible for the flue-gas deposits and corrosion in all parts of boiler plants. Experiments are described which show that when flue gases are passed over sand-blasted steel-surfaces which are maintained at the gradation in metal temperatures which can occur through a modern boiler plant, sulphur trioxide is produced at the high temperature surfaces, causing sulphuric acid to condense on the cooler surfaces. When the maximum surface temperature is moderated no appreciable formation of acid occurs. It is believed that the interaction of the sulphur trioxide in the generation zone, and the condensed acid in the cooler zone, with the various constituents of the fuel ash and the metal of the heating surface, can explain all the numerous deposit and corrosion effects which have been the subject of research work both here and abroad during recent years. The high surface temperatures which are necessary for the catalytic action to occur are largely due to the general advances in operating temperatures and pressures, and in some measure to “surface combustion” taking place on the tube surfaces, elevating their temperature above that which they would acquire if swept only by inert gases. Although the advance in steam and water temperatures is considered to be a primary factor in these difficulties, many other contributory factors, particularly the nature of the fuel, play an important part. Pulverized-fuel boiler-plants are least affected and, at the present time, the adoption of pulverized fuel appears to be the most effective way of dealing with the problem. Further research is necessary to devise practical means of prevention or alleviation in stoker and oil-fired plants, and it is thought that full consideration of the factors outlined in the paper may materially assist in this object.

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