Response Surface Methodology for Optimizing Zeolite Na-A Synthesis

Matlob, Abdul; Kamarudin, Rose; Jubri, Zaemah; Ramli, Zainab
July 2013
Arabian Journal for Science & Engineering (Springer Science & Bu;Jul2013, Vol. 38 Issue 7, p1713
Academic Journal
A statistical technique for optimizing zeolite Na-A synthesis as a function of percent yield was investigated. A two-step hydrothermal treatment method assisted by microwave heating was applied on the extracted ion solution for zeolites synthesis. The optimization sequence included the application of an experimental design and the results obtained were fitted to a second order model. The resultant predicted data were used in creation of an optimal set of conditions. Box-Behnken design of response surface methodology of three factors with three levels was applied. The three factors which have been adopted were NaOH concentration (2, 4 and 6 M), microwave power level (10, 55 and 100 % of 800 W) and time of exposure to the irradiation (1, 3.5 and 6 min). With the application of the above experimental design three solid products, Na-A zeolite, sodalite octahydrate and gibbsite were formed. The three products were characterized by their X-ray diffraction images. It was found that the percent yield of Na-A zeolite would be optimized when the extracted Si ion concentration in the response optimizer was higher than 2,000 ppm and the base used in the extraction not more than 4 M. The optimum conditions to maximize the percent yield of zeolite Na-A were 3.8 M of NaOH, 2.5 min of time and 48.2 % W of microwave power level.


Related Articles

  • Silica Reduction Technology for Fly Ash Zeolite Synthesis. Pathak, Chintan; Srivastava, V. K. // International Journal of Pure & Applied Sciences & Technology;Mar2012, Vol. 9 Issue 1, p47 

    The increasing requirements for the environmental protection have resulted in the search for more effective, inexpensive and ecologically safe solutions. Zeolite is one of the alternatives, which due to their peculiar structure are widely used for various environmental processes. The demand for...

  • Thermal stability studies of zeolites A and X synthesized from South African coal fly ash. Musyoka, Nicholas; Petrik, Leslie; Hums, Eric; Kuhnt, Andreas; Schwieger, Wilhelm // Research on Chemical Intermediates;Feb2015, Vol. 41 Issue 2, p575 

    The thermal stability of zeolites A and X synthesized from coal fly ash was studied by evaluation of TGA-DTA curves obtained on increasing the temperature and by in-situ temperature-programmed XRD analysis. It was found that zeolites A and X were both stable up to approximately 800 °C and...

  • Levels and Patterns of Polycyclic Aromatic Hydrocarbons in Coal-Fired Power Plant Bottom Ash and Fly Ash from Huainan, China. Ruwei, Wang; Jiamei, Zhang; Jingjing, Liu; Liu, Guijian // Archives of Environmental Contamination & Toxicology;Aug2013, Vol. 65 Issue 2, p193 

    Fly ash and bottom ash samples were collected from a coal-fired power plant located in Anhui province, China. Mineral phases and morphologies of the samples were determined by X-ray diffraction and scanning electron microscopy, respectively. Sixteen polycyclic aromatic hydrocarbon (PAH; 16...

  • The physicochemical properties and the fate of fly ash along the air pollution control devices in coal-fired power plant. Yi Zhang; Lili Fu; Quan Lu; Xin Cao; Jianyi Lu // Advanced Materials Research;2014, Vol. 1078, p144 

    The fly ash at the exit of inlet and outlet of No.2 ESP and outlet of No.2 FGD in San-he Power Plant were sampled. The microstructure, elemental composition, particle size distribution and other physicochemical properties of the collected ash samples were tested and analyzed by a scanning...

  • Radioactivity of coals and ashes from ÇatalaÄŸzi coal-fired power plant in Turkey. Aytekin, Hüseyin; Baldık, Rıdvan // Radiation Protection Dosimetry;Apr2012, Vol. 149 Issue 2, p211 

    The Çatalağzı coal-fired power plant (CFPP) is the Turkish CFPP that uses the hard coals produced in Zonguldak, located in the West Black Sea region of the country. Gamma-ray spectrometry was used to determine 226Ra, 232Th and 40K contents in pulverised coal, bottom ash and fly ash...

  • Fly Ash Potential and its Consumption in Important Product Formation. Dubey, P.; Verma, A. P.; Verma, Uma K. // Proceedings of the International Conference on Waste Technology ;2009, p780 

    The fly Ash a massive solid waste from coal fired power plant is produced with a crude estimation of more than 600 billion tones per year in the world (Khatri 2007). In India fly ash is produced by more than 82 coal based thermal power plants and a number of captive power station scattered...

  • Coal waste could hinder terrorists.  // TCE: The Chemical Engineer;Oct2007, Issue 796, p11 

    The article reports on the findings of U.S. researchers that fly-ash waste from coal-fired power plants could be used to prevent the explosive potential of common fertiliser. Researchers believe that coating ammonium nitrate with fly ash can reduce the harmful potential made available by mixing...

  • Production contract boosts Florida's fly ash supply.  // Concrete Products;Mar1998, Vol. 101 Issue 3, p6 

    Focuses on the production deal between Needham, Massachusetts-based Separation Technologies Ins. (STI) and the Saint John River Power Plant (SJRPP) in Jacksonville, Florida. Impact on the supply of fly ash in Florida; STI's patented technology that removes carbon from high-carbon cool fly ash;...

  • Study on the necessity for deironing from Al-Si alloys prepared by CFA via hydrometallurgy pretreatment. Ziliang Liu; Keqiang Xie; Wenhui Ma; Yang Zhou; Yi Wang // Materials Science Forum;2015, Vol. 833, p187 

    Coal fly ash (CFA), as a major solid waste of coal-fired power plants in China, is widely applied in building materials, pavement, and soil improvement. However, its potential value hasn't been fully utilized yet. In recent years, CFA has received attractive attention as a potential raw material...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics