مطالعه آزمايشگاهي حذف Co2 از گاز دودكش با استفاده از جاذب كربنات پتاسيم بر پايه نانو اكسيد تيتانيوم

چكيده انگليسي :

Experimental Study of CO2 Removal from Flue Gas using Potassium Carbonate on Nano TiO2 Support H Bahrani h bahrani@cc iut ac ir 11 Sep 2012 Isfahan University of Technology Isfahan 84156 Iran Deg M Sc Language Farsi M R Ehsani ehsanimr@cc iut ac ir A Moheb ahmad@cc iut ac ir abstract One of the most important problems affecting the quality of life is Global warming related to dissemination of greenhouse gases Among these gases carbon dioxide is a major greenhouse gas GHG This problem is caused by two reasons high volume publication and high residence time of carbon dioxide in the atmosphere Continued uncontrolled gas emission can cause extreme changes in climate all over the world and threaten the life Research on reducing green house gases emissions including developing non carbon energy sources improving energy efficiency and carbon dioxide capture and sequestration has increased in recent years Improving energy efficiency and using non carbon energy sources are the most effective in the short term next 20 years to reduce green house gases emissions However these methods are not usually applied Thus carbon dioxide removal and trapping them essential to prevent its release Since carbon dioxide capture is the most expensive step of burning fuel gas removing process it is important to find the other effective way Carbon dioxide is a greenhouse gas that is released into the environment due to burning of fossil fuels and it can cause global climate warming which may be disastrous to the environment Carbon dioxide can be removed from flue gas and waste gas streams by various methods such as membrane separation absorption with a solvent and adsorption using molecular sieves These methods however are costly and consume a lot of energy One of the improved techniques for the removal of carbon dioxide is chemical absorption with solid regenerable sorbents thepotassium based sorbents used in this study were prepared by impregnating Potasium carbonate on porous supports The aim of this study is to evaluate the laboratory process of carbon dioxide capture from flue gas using potassium carbonate on titanium nano oxide The potassium based sorbents used in this study were prepared by impregnating Potasium carbonate on nano Titanium oxide support produced by sol gel method in optimized conditions to maximize carbon dioxide capture capacity For this purpose in first step different types of sorbents are produced by sol gel technique In the second step a fixed bed reactor was used to determine the carbon dioxide removal efficiency by comparing the carbon dioxide content of the feed and product gases It is composed of a reactor a gas flow system an applied test systems single zone split tube furnace and a gas chromatograph GC After the fixed bed reactor testing and optimization of absorber conditions Sorbent special properties such as surface area size distribution and chemical component are measured by appropriate tests Such as X ray diffraction XRD and SEM BET techniques To optimize the condition of sorbent production calcinations temperature was set at 550 degree celsius gel residency duration for 12 75 hours and mixer speed equal to 30 rounds per minute These parameters were set to maximize produced solid absorption equal to 86 36 mg lit The most important result of these tests with optimal condition represented that the size of sorbent particles are 6 13nm and the surface area is 36 m2 gr Keyword carbon dioxide nano particle chemical solid absorber experimental design sol gel

بحراني، هاجر

مطالعه آزمايشگاهي حذف Co2 از گاز دودكش با استفاده از جاذب كربنات پتاسيم بر پايه نانو اكسيد تيتانيوم

نانو ذرات , جاذب مواد شيميايي , طراحي آزمايشات , سل-ژل