Microporous and Mesoporous Materials from Natural and Inexpensive Sources

Schwanke, Anderson Joel; Balzer, Rosana; Pergher, Sibele Berenice Castellã

doi:10.1007/978-3-319-48281-1_43-1

Cited by 23 publications

(29 citation statements)

References 85 publications

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“…Its synthesis uses traditional silica sources (i.e. water glass), which are involved in the generation of a large number of residues [7][8][9]. Then, they should be substituted by alternative sources that add value to materials considered waste for many industries and processes, bringing a new perspective to the production of catalytic materials with an appeal for environmental awareness.…”

Section: Introductionmentioning

confidence: 99%

LTA zeolite synthesis using natural materials and its evaluation by Green Star methodology

et al. 2020

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The industrial costs of zeolite synthesis can be diminished by the substitution of traditional raw materials by natural sources. In this work, we obtained LTA zeolite from four natural materials, three different diatomites and expanded perlite, and characterize them by X-ray diffraction, X-ray fluorescence and scanning electron microscopy. It was possible to observe the formation of the zeolitic materials through the identification of the Bragg reflections and the cubic morphology characteristic of the aluminosilicate. The Si/Al ratio of the samples resulted next to the unit as expected for this topology. We found small differences between the zeolitic products, remarking the possibility of adapting this process using natural materials to industry. These results were used for the Green Star evaluation, calculating the synthesis degree of greenness, resulting greener due to the complete substitution of the traditional silica source.

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Section: Introductionmentioning

confidence: 99%

LTA zeolite synthesis using natural materials and its evaluation by Green Star methodology

et al. 2020

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“…clays minerals (smectite, sepiolite, kaolin, palygorskite, attapulgite, vermiculite, etc), diatoms, electronic waste, fly coal ash and silica from rice husk seems thus very promising,. 17 According to the latest FAO (Food and Agriculture Organization, ONU) report, the world paddy rice production in 2018 was 759.6 million tons. 18 Approximately 20% of this value in weight corresponds to the rice husk (RH), which is considered the worldwide biggest agro-industrial waste product.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Synthesis of Hierarchical MWW Zeolites Using Silica from an Agro-industrial Waste, Rice Husk Ash

Gomes

Sachse

Gregório

et al. 2019

Crystal Growth & Design

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Sustainable and cost-efficient approach to obtain hierarchical MWW-type zeolites was developed through the use of silica extracted from rice husk ash; which is the largest agro-industrial waste product in the word. The effect of the concentration of OHions was determined in the synthesis of MWW-type zeolites with various chemical compositions. In addition, procedures to achieve hierarchical pillared and desilicated materials were assessed in order to obtain nano-architectures featuring intercrystalline or intracrystalline mesoporores. Nature and strength of acidity of materials was investigated through pyridine chemisorptions followed by IR. The impact of texture and acidity was evaluated on the acetalization reactions to produce bulky products. Synthesis of MWW zeolites with hierarchical pore architectures was realized using silica extracted from an agro-industrial residue, rice husk ash

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“…Some examples of aluminum sources are aluminum nitrate Al(NO 3 ) 3 , aluminum sulfate Al 2 (SO 4 ) 3 , and aluminum isopropoxide Al(O-i-Pr) 3 . These sources are not considered eco-friendly because they are obtained after several treatments and are associated with the production of a large amount of residues [14].…”

Section: Introductionmentioning

confidence: 99%

“…Among the inorganic reactants considered eco-friendly are raw materials such as clay minerals (kaolin, smectite, sepiolite and palygorskite), rice husk silica, fly coal ash, perlite, and diatomite [13,15,16]. However, in most synthesis procedures using raw materials, the starting material is pre-treated with acid or alkali at high temperatures (>600 °C) to amorphize the previous phase, obtaining SiO 4 and AlO 4 available for the nucleation and crystallization of the desired zeolite [14]. Thus, the search for strategies able to be applied in zeolite synthesis incorporating low cost and environmentally friendly raw materials free from pre-treatments is still challenging and attractive.…”

Section: Introductionmentioning

confidence: 99%

Incorporation of Brazilian Diatomite in the Synthesis of An MFI Zeolite

et al. 2019

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The need for greener procedures is a fact to reduce residues, to decrease industrial costs, and to accomplish the environmental agreements. In an attempt to address this question, we propose the addition of a natural resource, Brazilian diatomite, to an MFI zeolite traditional synthesis. We have characterized the resulting product with different techniques, such as X-ray diffraction, microscopy, and gas sorption, and, afterwards, we evaluate the greenness of the process by the Green Star method. The results were promising: We obtained the desired topology in the form of small crystallites aggregated and a pore diameter of 0.8 nm. In conclusion, the product has the necessary characteristics for an adsorption or catalytic future tests and escalation to industrial production.

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Microporous and Mesoporous Materials from Natural and Inexpensive Sources

Cited by 23 publications

References 85 publications

LTA zeolite synthesis using natural materials and its evaluation by Green Star methodology

LTA zeolite synthesis using natural materials and its evaluation by Green Star methodology

Sustainable Synthesis of Hierarchical MWW Zeolites Using Silica from an Agro-industrial Waste, Rice Husk Ash

Incorporation of Brazilian Diatomite in the Synthesis of An MFI Zeolite

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