Conversion of rice husk ash to zeolite beta

Prasetyoko, Didik; Ramli, Zainab; Endud, Salasiah; Hamdan, Halimaton; Sulikowski, Bogdan

doi:10.1016/j.wasman.2005.09.009

Cited by 164 publications

(83 citation statements)

References 19 publications

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“…Zeolites can be successfully obtained from different natural raw materials [1][2][3][4]. Moreover, various manufacturing and agro wastes have been studied as a starting material in synthesizing zeolite [5][6][7][8]. The chemical composition of the raw material used, particularly the presence of silicon and aluminum oxides, is one of the important factors responsible for obtaining various types of zeolites [9].…”

Section: Introductionmentioning

confidence: 99%

Characterization of the products obtained from alkaline conversion of tuff and metakaolin

Grela

Łach

Bajda

et al. 2018

J Therm Anal Calorim

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Currently, there has been a growing interest of zeolite materials for industrial and scientific purpose. Synthetic zeolites are more often used than natural ones due to its higher purity and more uniform particle sizes. Numerous investigations are conducted in searching of inexpensive raw materials suitable for zeolite synthesis. Moreover, the temperature, pressure, times and SiO 2 /Al 2 O 3 ratio are the most important parameters which play key roles in the synthesis processes. Due to such a large number of factors that affect the process, zeolite synthesis has been undergoing constant development. Nowadays, researchers focus on the methods of synthesizing zeolites at ambient temperature and pressure. Metakaolin and tuff are natural raw materials which can be turned into a brand new class of synthetic zeolites. However, each requires different method of synthesis in order to obtain a material with best physical properties. This paper discusses the process of alkaline activation of synthetic zeolites from natural raw materials: volcanic tuff excavated in Filipowice and metakaolin obtained from Rominco company. Two methods: fusion and low-temperature synthesis, were used in the presented research. Moreover, the physical properties of raw materials and zeolites obtained were shown. Based on the XRD analysis, it was verified that materials after the synthesis process contained zeolites A, Na-X and faujasite-Na. Furthermore, the dehydration and thermal decomposition phenomena of the tuff and metakaolin before and after the synthesis process were determined by coupled TG/MS techniques.

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Section: Introductionmentioning

confidence: 99%

Characterization of the products obtained from alkaline conversion of tuff and metakaolin

Grela

Łach

Bajda

et al. 2018

J Therm Anal Calorim

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“…Waste materials are also used for the synthesis of zeolites as the carriers of SiO2 and Al2O3. Zeolites are obtained among others from coal fly ash [15], rice husk ash [16], municipal incinerator fly ash [17].…”

Section: Introductionmentioning

confidence: 99%

Limitation of the environmental impact of ashes from combustion of sewage sludge by the synthesis of zeolites

Latosińska

2017

E3S Web Conf.

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Abstract. The combustion of municipal sewage sludge allows for the recovery of renewable energy. However, it simultaneously causes the formation of ash which is not neutral for the environment. The study presents the research on the possibility of using sewage sludge ash as a raw material for the synthesis of zeolites. The synthesis of zeolites was performed with the use of an indirect fusion method and a direct hydrothermal method. The research on sewage sludge ash after zeolitization included the identification of crystalized phases, the observation of changes of ash particles surface and the measurement of cation exchange capacity (CEC). The research results proved that optimal conditions for the formation of zeolite Y were the synthesis with the indirect fusion method at the sewage sludge ash to hydroxy sodalite ratio of 1:1.8, the activation temperature of 60 o C and the crystallization temperature of 90 o C. Hydroxy sodalite was found in samples from both methods of zeolitization. However, in the case of direct hydrothermal method, particles of hydroxy sodalite structure were less numerous indicating a small conversion of sewage sludge ash to crystalline zeolite. CEC values comparable to commercial zeolites resulted from zeolitization with the indirect fusion method.

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“…the utilization of silica from RH for the synthesis of various types of zeolite [8][9][10][11][12][13][14], and mesoporous silica such as . Efforts have also been made to use RH as a source of silica for the synthesis of NaY zeolite with the autoclave process.…”

Section: Introductionmentioning

confidence: 99%

“…While Zn II has experienced electrostatic bonding interaction with the framework oxygen atoms, creation of mesopores in NaY due to local destruction of the zeolite lattice around the growing ZnS particles was evidenced. Wonderfully, ZnS/NaY exhibited a high performance in prohibiting the growth of Escherichia coli (E. coli) and negligible from P. Aeruginosa, and these important features make it a potential candidate as an antimicrobial agent for controlling implant-related infections.the utilization of silica from RH for the synthesis of various types of zeolite [8][9][10][11][12][13][14], and mesoporous silica such as . Efforts have also been made to use RH as a source of silica for the synthesis of NaY zeolite with the autoclave process.…”

mentioning

confidence: 99%

Novel Synthesis of Nay Zeolite from Rice Husk Silica: Modification with Zno and Zns for Antibacterial Application

Salama¹,

Othman²

2016

Chem Sci J

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Zeolite Y in the sodium form (NaY) was synthesized using amorphous silica ash derived from waste rice husks under hydrothermal conditions. Structural characterization of NaY before and after modification with ZnO and ZnS has been done using powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), N 2 adsorption-desorption at -196 °C, scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy. The effects of the Na 2 O/SiO 2 and Si/Al ratios, aging temperature and crystallization time on the optimized synthesis of NaY were thoroughly investigated. Thus the regulated Na + impurity concentration in the starting hydrogel was found to act as a template-assisted synthesis of zeolite NaY by the potential incorporation of Al atoms into the zeolite framework. Results of surface analyses indicate that the interactions of ZnO and ZnS with NaY zeolite are distinguishable and thus the higher interaction is observed for the latter. While Zn II has experienced electrostatic bonding interaction with the framework oxygen atoms, creation of mesopores in NaY due to local destruction of the zeolite lattice around the growing ZnS particles was evidenced. Wonderfully, ZnS/NaY exhibited a high performance in prohibiting the growth of Escherichia coli (E. coli) and negligible from P. Aeruginosa, and these important features make it a potential candidate as an antimicrobial agent for controlling implant-related infections.the utilization of silica from RH for the synthesis of various types of zeolite [8][9][10][11][12][13][14], and mesoporous silica such as . Efforts have also been made to use RH as a source of silica for the synthesis of NaY zeolite with the autoclave process. This low-cost process may lead to production of zeolite NaY to be economically able to compete with established commercial zeolite [16]. Zeolites could selectively adsorb biopolymers like protein, DNA, and RNA, and therefore could be used as chromatographic carriers for these molecules [17][18][19][20]. For these reasons, zeolites would be able to selectively adsorb microbial cells and could be used as cell separation carriers in their native state without surface modifications. Zeolites could adsorb each of the bacterial cell species with high selectivity even from a mixed suspension and could therefore be used as effective carrier materials to provide an easy, rapid and accurate method for cell separation [21]. Zinc oxide supported on zeolite with novel physicochemical properties has recently synthesized [22]. There are some reports regarding the industrial uses of ZnO/ zeolite [23][24][25]. This system can also provide significant impact on the design of a controlled-release product for the pharmacological application in alleviating post-weaning diarrhea of piglets.The aim of this research was to use the RH as an amorphous silica source in the synthesis of NaY zeolite under the optimized experimental conditions. The effects of gel aging and crystallization conditions for the synthesis of NaY under fully optimiz...

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Conversion of rice husk ash to zeolite beta

Cited by 164 publications

References 19 publications

Characterization of the products obtained from alkaline conversion of tuff and metakaolin

Characterization of the products obtained from alkaline conversion of tuff and metakaolin

Limitation of the environmental impact of ashes from combustion of sewage sludge by the synthesis of zeolites

Novel Synthesis of Nay Zeolite from Rice Husk Silica: Modification with Zno and Zns for Antibacterial Application

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