Control of the Porosity and Morphology of Ordered Mesoporous Silica by Varying Calcination Conditions

Rashid, R. I. M. A.; Afroze, Farhana; Ahmed, Shabbir; Miran, Muhammed Shah; Bin, Abu; Susan, Hasan

doi:10.1016/j.matpr.2019.04.119

Cited by 6 publications

(9 citation statements)

References 23 publications

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“…The large variation in the surface area of the SBA-15 might be attributed greatly to the preparation methodology, raw material ratios and calcination temperatures. Having said that, the BET surface are of this material is still higher than many mesoporous materials belonging to the same class of materials 7,26 . The classical type IV isotherm (Fig.…”

Section: Ftir Ftir Spectroscopy Assists In Understanding the Interacmentioning

confidence: 88%

“…This is attributed to the presence of Si-OH groups present. The peak at 947 cm −1 is also due to the stretching vibration of Si-OH 26 . For NbOFFIVE-1-NI, peaks at 3221, 1615, 1402, and 465 cm −1 most likely correspond to the characteristic nickel O-H stretching.…”

Section: Ftir Ftir Spectroscopy Assists In Understanding the Interacmentioning

confidence: 98%

“…The BET model was used to analyze the surface area in relation to the relative pressure of the system (P/P o ). Pore size distribution were obtained by the Barrett-Joyner-Halenda (BHJ) method 25,26 .…”

Section: Sample Characterizationmentioning

confidence: 99%

“…Rashid 26 reported that uniform hexagonal pores are characteristic of SBA-15 defined by a narrow pore size distribution and pore diameter of 5-15 nm giving the SBA-15 the required thermal and mechanical stability. The resultant BET surface obtained here fitted well with in the range of BET areas reported in literature for the highly ordered large-pore mesoporous silica molecular sieve SBA-15 (between 400-900 m 2 ).…”

Section: Ftir Ftir Spectroscopy Assists In Understanding the Interacmentioning

confidence: 99%

“…The dominance of the physisorption is in line with results obtained by N 2 adsorption isotherms. Bhatt 26 reported that NbOFFIVE-1-Ni offers superior CO 2 volumetric uptake using physisorption mechanisms at low CO 2 concentrations. The initial low values in Q st could be attributed to strong CO 2 adsorption at the start of the process when the NbOFFIVE-1-Ni cube structure is empty and have free space to accommodate CO 2 within its cage structure.…”

Section: Heats Of Adsorptionmentioning

confidence: 99%

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Solid Sorbents as a Retrofit Technology for CO2 Removal from Natural Gas Under High Pressure and Temperature Conditions

Khraisheh

Almomani

Walker

2020

Sci Rep

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The capture of CO2 under high pressure and temperature is challenging and is required in a number for industrial applications including natural gas processing. In this work, we examine the use of benchmark hybrid ultraporous materials HUMs for their potential use in CO2 adsorption processes under high-pressure conditions, with three varying temperatures (283, 298 and 318 K). NbOFFOVE-1-Ni and SIFSIX-3-Ni were the selected HUMs given their established superior CO2 capacity under low pressure (0–1 bar). Both are microporous with highly ordered crystalline structures as compared to the mesoporous hexagonal silica (Santa Barbara Anhydrous-15 (SBA-15)). SBA-15 was previously tested for both low and high-pressure applications and can serve as a benchmark in this study. Sorbent characterization using XRD, SEM, FTIR and N2 adsorption were conducted to assure the purity and structure of the sorbents. TGA analysis were conducted to establish the thermal stability of the sorbents under various temperatures. High-pressure CO2 adsorption was conducted from 0–35 bar using magnetic suspension balance (Rubotherm). Although the SBA-15 had the highest surface (527 m3/g) are of the three adsorbents, the CO2 adsorption capacity (0.42 mmol/g) was an order of magnitude less than the studies HUMs with SIFSIX-3-Ni having 2.6 mmol/g, NbOFFIVE-1-Ni achieving 2.5 mmol/g at 298 K. Multistage adsorption isotherms were obtained at different pressures. In addition, results indicate that electrostatics in HUMs are most effective at improving isosteric heat of adsorption Qst and CO2 uptake. Higher temperatures had negative effect on adsorption capacity for the HUMs and SBA-15 at pressures between 7–9 bar. In SAB-15 the effect of temperature is reversed in what is known as a cross over phenomena.

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Section: Ftir Ftir Spectroscopy Assists In Understanding the Interacmentioning

confidence: 88%

Section: Ftir Ftir Spectroscopy Assists In Understanding the Interacmentioning

confidence: 98%

Section: Sample Characterizationmentioning

confidence: 99%

Section: Ftir Ftir Spectroscopy Assists In Understanding the Interacmentioning

confidence: 99%

Section: Heats Of Adsorptionmentioning

confidence: 99%

See 3 more Smart Citations

Solid Sorbents as a Retrofit Technology for CO2 Removal from Natural Gas Under High Pressure and Temperature Conditions

Khraisheh

Almomani

Walker

2020

Sci Rep

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show abstract

Thermal deactivation kinetics and thermodynamics of a silica gel using surface area data

Sarıkaya

Ceylan

Önal

et al. 2020

J Therm Anal Calorim

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The study of silica morphologies generated in spray dried systems

Albar,

Ajiz,

Widiyastuti

et al. 2023

Ii International Conference “Sustainable Development: Agriculture, Veterinary Medicine and Ecology”

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Control of the Porosity and Morphology of Ordered Mesoporous Silica by Varying Calcination Conditions

Cited by 6 publications

References 23 publications

Solid Sorbents as a Retrofit Technology for CO2 Removal from Natural Gas Under High Pressure and Temperature Conditions

Solid Sorbents as a Retrofit Technology for CO2 Removal from Natural Gas Under High Pressure and Temperature Conditions

Thermal deactivation kinetics and thermodynamics of a silica gel using surface area data

The study of silica morphologies generated in spray dried systems

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