Template synthesis and water vapor adsorption by micro- and mesoporous silica gels with high specific surface area

Пузырев, И. С.; Собина, Е. П.; Adamova, L. V.; Кодесс, М. И.; Медведевских, С. В.

doi:10.1134/s1087659615020108

Cited by 8 publications

(3 citation statements)

References 30 publications

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“…Comparing within the same relative pressure (P/P 0 = 0.2), it overcame the performance of Al-MCM-41 at 25 °C (90 g kg −1 ) [61], Al-SBA-15 at 30 °C (50 g kg −1 ) [62], Zr-MPS at 25 °C (90 g kg −1 ) [63] and rehydroxylated MCM-41 at 25 °C (80 g kg −1 ) [64]. Its capacity was comparable to Al-MCM-41 developed by Chen et al [1], which presented 130 g kg −1 for adsorption at 25 °C. Nevertheless, at P/P 0 = 1, their material reached 350 g kg −1 , whereas C1-Zr reached up to 570 g kg −1 .…”

Section: Performance Evaluationmentioning

confidence: 60%

“…The adsorption of water vapor is a process of great relevance due to its wide possibilities of application, such as in chemical and petro-chemical industry, gas and liquid drying, microelectronics, pharmaceuticals, food preservation and processing, architecture materials, cosmetics, paper making, thermal energy conversion and storage, humidity control, adsorption heat pumps, and even fresh water production from the air [1][2][3]. Therefore, there is a growing interest in the research for novel materials to be applied in this field.…”

Section: Introductionmentioning

confidence: 99%

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Impact of heteroatom addition into mesoporous silica for water adsorption in the low partial pressure range

et al. 2021

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Mesoporous silicas are known to be high-performing water adsorbents in high humidity levels due to their large pore volumes. However, for low humidity conditions, these materials typically present a less expressive performance, which is a drawback for many applications. In the present report, mesoporous silica SBA-15 was functionalized with Al, Ti, Zr and Li in order to improve their performance in this condition. The influence of functionalization in porosity, morphology and acidic sites was investigated. Samples with an increased number of acidic sites and with higher microporosity when compared to pure silica were produced. This was responsible for their enhanced performance for water adsorption in low moisture conditions. Sample functionalized with zirconium in SBA-15 synthesis improved the water adsorption capacity of pure silica by three times, reaching up to 127 g kg −1 at a relative pressure of 0.2 and 570 g kg −1 close to saturation pressure. This sample was found to be a promising material to be applied in processes which require high adsorption capacities in both low and high water partial pressure ranges. Moreover, the understanding of the mechanisms behind the heteroatom functionalization can be applied to any silica material in order to enhance its attractiveness towards any polar molecule. Supplementary Information The online version contains supplementary material available at 10.1007/s10450-021-00336-6.

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Section: Performance Evaluationmentioning

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Impact of heteroatom addition into mesoporous silica for water adsorption in the low partial pressure range

et al. 2021

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“…То есть для определения высоты слоя адсорбента и его порозности необходимо задействовать различные физические величины. Высота слоя и порозность определяются в соответствие с[17]. Порозность будет тем меньше, чем меньше насыпная плотность, а масса тем меньше, чем больше адсорбционная емкость.…”

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Study of the Possibilities of Reducing the Energy Intensity of Adsorption Processes with High Requirements for the Moisture Content of Compressed Air

Ripol'-Saragosi,

Vorob'ev,

Sobolev

et al. 2023

Bulletin of Scientific Research Results

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Purpose: Study of the possibility of reducing the energy intensity of adsorption processes with high requirements for the moisture content of compressed air. Results: It has been shown that the molecular sieve RS-144M has the lowest weight among all the adsorbents represented due to its low density, which makes it possible to reduce the weight of the adsorption unit; the smallest volume and height of adsorption filling in the column have zeolites NaA and Ka-CO, followed by molecular sieves; due to the release of the molecular sieve RS-144M in the form of a powder the size of the working pores of 3Å, it has a low bulk density and the smallest intergranular spaces, which provides a low value of porosity of the granules, a total of 8.3% of the total fill volume. Practical significance: The use of molecular sieves produced on the basis of zeolite helps to reduce the energy capacity of the compressed air drying process. The most effective is the molecular sieve RS-144M. It allows you to dry compressed air to meet the requirements of the highest moisture purity classes, while guaranteeing the lowest energy consumption. The remaining adsorbents will also allow the compressed air to be dried to the desired purity grade, but will have an energy consumption greater than that of the RS-144M, making their use not always expedient.

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Evaluation of surface energetics of zirconium-containing mesoporous silica using novel universal isotherm model

et al. 2020

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Template synthesis and water vapor adsorption by micro- and mesoporous silica gels with high specific surface area

Cited by 8 publications

References 30 publications

Impact of heteroatom addition into mesoporous silica for water adsorption in the low partial pressure range

Impact of heteroatom addition into mesoporous silica for water adsorption in the low partial pressure range

Study of the Possibilities of Reducing the Energy Intensity of Adsorption Processes with High Requirements for the Moisture Content of Compressed Air

Evaluation of surface energetics of zirconium-containing mesoporous silica using novel universal isotherm model

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