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Research on products of simultaneous removal of SO2 and NOx from flue gas by ozonation and alkaline absorption

Głomba M., Hałat A., Kordylewski W., Łuszkiewicz D.

Environment Protection Engineering

2016

Vol. 42, nr 2

125--136

The results of laboratory scale research have been presented on the effects of ozonation of carrier gas containing NOx and SO2 on by-products trapped in Dreschel washers with solution of sodium hydroxide. The controlling parameter in this process was the ozonation intensity determined by the molar ratio O3/NOx. The measured by-products in a scrubber were SO32- , SO42- , NO2- and NO3- ions. It has been shown that ozonation of flue gas favours oidation of nitrites to nitrates and sulfites to sulfates in alkaline solution. Some of these results were confirmed in a pilot scale studies. Pilot plant was located in Wroclaw CHP (Combined Heat and Power), which provided flue gas for testing at a rate of 200 m3/h from the OP-430 boiler. Exhaust gases were ozonized and captured simultaneously with SO2. Sodium hydroxide was used in a pilot scale as an absorbent.

Thermoeconomics as a tool for management decision during the design and operation of cogeneration systems

Lora E. E. S., Santos J. J., Venturini O. J., Do Nascimento M. A. R., Zampieri M., Arrieta F. R. P., Teixeira F. N.

Zeszyty Naukowe. Elektryka / Politechnika Opolska

2006

Vol. 315, z. 56

415-428

In the paper three cases of real thermoeconomic evaluation are presented: an oil refinery combined cycle cogeneration plant, a sugar and alcohol mill, and a research and development center utilities plant. These cases covers all the spectra of possible cogeneration plants. The paper objective is to show that thermoeconomics is a tool that could be used for information survey during management decision making process in the industrial sector with cogeneration facilities. As a result for each case is carried out an evaluation of different alternatives feasibility on the base of the main products exergy costs. In the first two cases these results are presented for some of the different repowering options that were analyzed and in last one for the comparison of products costs during cogeneration with the ones produced in conventional equipments. As conclusions for each case a set of management decisions is suggested based on the thermoeconomic results.