Novel Application of ZSM-5 Zeolite: Corrosion-Resistant Coating in Chemical Process Industry

Pande, Hitesh; Parikh, Parimal A.

doi:10.1007/s11665-012-0226-z

Cited by 16 publications

(10 citation statements)

References 49 publications

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“…A large variety of reactions such as cracking, isomerization, dewaxing, dehydration, hydrodeoxygenation and alkylation can be accomplished with microporous zeolites [12][13][14][15][16][17][18]. Moreover, the applications of zeolites in the fields of separation, chemical sensors, anticorrosive coating, low-k materials, and hydrophilic antimicrobial coatings are a research hotspot at present [19][20][21][22]. As a well-known microporous aluminosilicate [23,24] firstly synthesized by scientists in 1969, ZSM-5 zeolite has a 3D host framework of intersecting 10-membered rings, with a pore size of (0.51 × 0.55 nm) in the [100] direction.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of MFI Zeolite Derived from Different Silica Sources: Synthesis, Characterization and Catalytic Performance

Zhang

Liu

et al. 2018

Catalysts

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In this paper, a comparative study of MFI zeolite derived from different silica sources is presented. Dry gel conversion (DGC) method is used to synthesize silicalite-1 and ZSM-5 with MFI structure. Two kinds of silica sources with different particle sizes are used during the synthesis of MFI zeolite. The as-prepared samples were characterized by X-ray diffraction (XRD), N2-sorption, Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM) and X-ray fluorescence spectrometer (XRF). From the characterization results, it could be seen that the high-quality coffin-like silicalite-1 was synthesized using silica sphere with particle size of 300 nm as silica source, with crystallization time being shortened to 2 h. The schematic diagram of silicalite-1 formation using silica sources with different particle sizes is summarized. ZSM-5 was obtained by adding Al atoms to raw materials during the synthesis of MFI zeolite. The performance of aqueous phase eugenol hydrodeoxygenation over Pd/C-ZSM-5 catalyst is evaluated.

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Section: Introductionmentioning

confidence: 99%

A Comparative Study of MFI Zeolite Derived from Different Silica Sources: Synthesis, Characterization and Catalytic Performance

Zhang

Liu

et al. 2018

Catalysts

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“…The proposed approach retained both the relevant advantages from a technological point of view, without losing mechanical stability, and corrosion durability of the zeolite coating in severe environmental conditions. The optimization of the complex in situ crystallization process characterized by several synthesis parameters is a key point to in creating a coating with high mechanical properties as well as good barrier capabilities and durability for applicability in industrial applications (e.g., chemical industry, biomedical applications, or air conditioning systems) [46,58,59].…”

Section: Anti-corrosion Zeolite Coatingsmentioning

confidence: 99%

“…The pores and channels in the prepared zeolite film were blocked by the structure directing agent. In the same year Pande et al [58] have reported a very extensive work in which demonstrated an effective protective action of DGC ZSM-5 zeolite coatings in different acidic environmental conditions. Afterwards, other works were published evidencing the suitability of this deposition technique [8,50].…”

Section: Anti-corrosion Zeolite Coatingsmentioning

confidence: 99%

Anticorrosion Behavior of Zeolite Coatings Obtained by In Situ Crystallization: A Critical Review

Calabrese

2018

Materials

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Zeolites are crystalline nanoporous aluminosilicates. Thanks to their intrinsically nanoporous structure they are widely used as molecular sieves, for exchanging ions, or, also thanks to the high surface area of these structures, for catalytic applications. Furthermore, thanks to their thermal and chemical stability, in recent years zeolite coatings have been evaluated for application as anti-corrosion coatings. The non-toxicity of this class of coatings makes it possible that they will be an environmentally friendly alternative to conventional chromate-based coatings. This article provides a brief review of the anti-corrosion performance of zeolite coatings, applied by direct synthesis technique to several metals and alloys, as discussed in the literature. After a short description of the microstructure and properties of zeolites, the discussion addresses the research activities related to this topic, as reported in the literature. Comparative analysis of literature results supported the dry-gel conversion method as a promising approach that combines a simplified synthesis procedure with anti-corrosion coating performance. Based on these considerations, an evaluation of future trends is discussed along with the final remarks.

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“…[13][14][15] Zeolite is applied in catalytic cracking, isomerization and alkylation, as well as in the nitration reactions, including nitration of xylene, 16 deactivated aromatic compounds, 17 phenol 18 and stilbene. 19 Moreover, selective nitration of the aromatic compounds by zeolite/N 2 O 5 20,21 and zeolite/nitric acid/acid anhydride systems 22 have been published.…”

Section: Introductionmentioning

confidence: 99%

“…[13][14][15] Zeolite is applied in catalytic cracking, isomerization and alkylation, as well as in the nitration reactions, including nitration of xylene, 16 To the best knowledge of the authors of this article, no report is available in the literature where a zeolite was Synthesis of CL-20 from TADB in a One-Pot Method by Zeolite/HNO 3 as a New Nitrolysis System J. Braz. Chem.…”

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confidence: 99%

Synthesis of CL-20 from TADB in a One-Pot Method by Zeolite/HNO₃as a New Nitrolysis System

Bayat¹,

Hajighasemali²,

Mohajeri³

2016

Journal of the Brazilian Chemical Society

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Hexanitrohexaazaisowurtzitane is the most powerful non-nuclear explosive in the world. Herein, a greener and safer new one-pot method for the synthesis of CL-20 from tetraacetyldibenzylhexaazaisowurtzitane (TADB) has been developed through zeolite/98% HNO 3 . The H-ZSM-5 catalyst, with both Brønsted and Lewis acid sites, indicated higher catalytic activity. The reaction using H-ZSM-5 has been optimized with respect to reaction temperature, reaction time, amount of acid and amount of catalyst to substrate ratio. Keywords: debenzylation, nitrolysis, zeolite, tetraacetyldibenzylhexaazaisowurtzitane, CL-20Introduction 2 , 4 , 6 , 8 , 1 0 , 1 2 -H e x a n i t r o -2 , 4 , 6 , 8 , 1 0 , 1 2 -hexaazaisowurtzitane , first proposed by Willer 1 and synthesized by Nielsen et al., 2 has been subjected to extensive studies.3 It is a well-known caged nitramine with significantly higher density (e-form), 4 higher performance and minimum signature than the other nitramines (HMX, RDX); therefore, CL-20 has found numerous military applications. 5 All the processes for CL-20 synthesis are based on the same starting materials. 6 In the first step, the hexa substituted hexaazaisowurtzitane derivatives are formed in the condensation reactions (glyoxal and primary amines). Subsequently, CL-20 is prepared by debenzylation and nitration of hexaazaisowurtzitane derivatives. 9 have been introduced for the synthesis of CL-20 from TADB. The preparation of CL-20 in the final step requires the use of HNO 3 /H 2 SO 4 which has many disadvantages including formation of environmentally unfriendly wastes that are expensive to dispose of, strong acidic media, over nitration and safety problems. Presently, the environmental concerns would not allow such means of disposal; thus, there still remains a need to develop commercially valuable process and environment-friendly methods for preparation of CL-20. 10The synthesis of CL-20 from TADB by applying melamine hydrogen sulfate/HNO 3 11 and acidic ionic liquids/HNO 3 12 in the one-pot reactions is reported in the recent studies of these authors. Nevertheless, these methods (Table 1) are affected by the use of stoichiometric quantities of expensive reagents and the high temperature of reaction which is a drawback of industrial scales.Zeolites, with their unique advantages of high thermal and acid stability and high selectivity (through homogeneous pore shape and size with their defined cages and channels) have been considered at industrial scale. [13][14][15] Zeolite is applied in catalytic cracking, isomerization and alkylation, as well as in the nitration reactions, including nitration of xylene, 16 To the best knowledge of the authors of this article, no report is available in the literature where a zeolite was Synthesis of CL-20 from TADB in a One-Pot Method by Zeolite/HNO 3 as a New Nitrolysis System J. Braz. Chem. Soc. 1104 applied in nitrolysis of the substrate. In this study, the zeolite/HNO 3 as a nitrolysis system (nitro-debenzylation, nitro-deacetylation) was applied in order to prepar...

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Novel Application of ZSM-5 Zeolite: Corrosion-Resistant Coating in Chemical Process Industry

Cited by 16 publications

References 49 publications

A Comparative Study of MFI Zeolite Derived from Different Silica Sources: Synthesis, Characterization and Catalytic Performance

A Comparative Study of MFI Zeolite Derived from Different Silica Sources: Synthesis, Characterization and Catalytic Performance

Anticorrosion Behavior of Zeolite Coatings Obtained by In Situ Crystallization: A Critical Review

Synthesis of CL-20 from TADB in a One-Pot Method by Zeolite/HNO₃as a New Nitrolysis System

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Novel Application of ZSM-5 Zeolite: Corrosion-Resistant Coating in Chemical Process Industry

Cited by 16 publications

References 49 publications

A Comparative Study of MFI Zeolite Derived from Different Silica Sources: Synthesis, Characterization and Catalytic Performance

A Comparative Study of MFI Zeolite Derived from Different Silica Sources: Synthesis, Characterization and Catalytic Performance

Anticorrosion Behavior of Zeolite Coatings Obtained by In Situ Crystallization: A Critical Review

Synthesis of CL-20 from TADB in a One-Pot Method by Zeolite/HNO3as a New Nitrolysis System

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Synthesis of CL-20 from TADB in a One-Pot Method by Zeolite/HNO₃as a New Nitrolysis System