Journals / Anadolu Üniversitesi Bilim ve Teknoloji Dergisi :A-Uygulamalı Bilimler ve Mühendislik / 2006 / Cilt: 7 - Sayı: 2

Effects of some additivies on $SO_2$ removal by aqueous $Ca(OH)_2$ suspensions

$Ca(OH)_2$ süspansiyonları ile $SO_2$ gideriminde bazı katkı maddelerinin etkisi

Pages
431–441
Publication Date
2022-10-11
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Taking into account the increases in $Ca^{2+}$ usage and in the oxidation yield of CaSO3, the adipic acid with a concentration 0.01 mol/L has been decided as the most adequate additive.

📌 3 Key Takeaways

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Objective & Hypothesis:In this study, SO2 has been absorbed from flue model gas which has flow rate about 25 L/min and prepared with an amount of 10000 ppm SO2 in air by aqueous 6,6% Ca(OH)2 suspension in a bubble column reactor.
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Key Findings & Data:To observe the effects of additives on SO2 removal efficieny, the adipic acid, acetic acid, and citric acid or magnesium sulfate were added as additives into the aqueous Ca(OH)2 suspension having 3 L volume and a temperature about 25°C or 50°C.
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Conclusion & Impact:Taking into account the increases in $Ca^{2+}$ usage and in the oxidation yield of CaSO3, the adipic acid with a concentration 0.01 mol/L has been decided as the most adequate additive.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

In this study, SO2 has been absorbed from flue model gas which has flow rate about 25 L/min and prepared with an amount of 10000 ppm SO2 in air by aqueous 6,6% Ca(OH)2 suspension in a bubble column reactor. To observe the effects of additives on SO2 removal efficieny, the adipic acid, acetic acid, and citric acid or magnesium sulfate were added as additives into the aqueous Ca(OH)2 suspension having 3 L volume and a temperature about 25°C or 50°C. These organic acids have increased $Ca^{2+}$ usage because of their pH regulation effects while mangan sulfate increases CaSO3 oxidation because of its catalytic effect in this suspension. The SO2 compositions at the exit of the reactor and pH of the absorption medium have been measured continuously. $Ca^{2+}$ analyses of the samples taken from the system with certain times have been performed by EDTA titrimetric method using muresside as indicator. Taking into account the increases in $Ca^{2+}$ usage and in the oxidation yield of CaSO3, the adipic acid with a concentration 0.01 mol/L has been decided as the most adequate additive.

Özet

Bu çalışmada, S02 kabarcıklı bir kolon reaktörde %6,6 Ca(OH)2 süspansiyonları ile hava içerisinde 10000 ppm SO2 içerecek şekilde hazırlanan ve akış hızı 25 L/dak olan atık model gazdan absorplanmıştır. SO2 giderimindeki etkilerilerini görebilmek için 3 L hacim ve 25 °C veya 50°C sıcaklıktaki Ca(OH)2 süspansiyonuna katkı maddesi olarak adipik asit, asetik asit ve sitrik asit ve mangan sülfat eklenmiştir. Mangan sülfat katalitik etkisiyle CaSO3 oksidasyonunu artırırken organik asitler pH düzenleyici etkileri ile $Ca^{2+}$ kullanımım artırmıştır. Reaktör çıkışındaki SO2 derişimi ile absorpsiyon ortamının sıcaklık ve pH'ı sürekli olarak ölçülmüştür. Belirli süre ve miktarlarda sistemden numune alınarak indikatör olarak müreksidin kullanıldığı standart EDTA titrimetrik metodla $Ca^{2+}$ analizi yapılmıştır. $Ca^{2+}$ kullanımındaki ve CaSO3 okidasyonundaki artış gözönünde bulundurularak en uygun katkı maddesinin 0,01 mol/L derişiminde adipik asit olduğuna karar verilmiştir.

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Cite This Article

ÖCAL, S. E., KAYTAKOĞLU, S. (2022). Effects of some additivies on $SO_2$ removal by aqueous $Ca(OH)_2$ suspensions. Anadolu Üniversitesi Bilim ve Teknoloji Dergisi :A-Uygulamalı Bilimler ve Mühendislik, Cilt: 7 - Sayı: 2, 431–441. https://ajindex.com/articles/438402

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