Effect of the structure of the support and the aminosilane type on the adsorption of H2S from model gas

Abdouss, Majid; Hazrati, Nastaran; Beigi, Ali Akbar Miran; Vahid, Amir; Mohammadalizadeh, Ali

doi:10.1039/c3ra43181a

Cited by 20 publications

(15 citation statements)

References 37 publications

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“…It is vital to analyze the graphical form of energy distribution function EDF associated with the universal isotherm model's key parameters. Figure 5 shows the nitrogen isotherms of other variants of MCM-41 adsorbent (Abdouss et al, 2014), which is similar in behavior to isotherms shown in Figure 4A as they are also TYPE VI isotherms with dual step saturation. Also, all of the four isotherms are showing a similar response against relative pressure.…”

Section: Resultssupporting

confidence: 54%

“…Figure 4A shows the nitrogen isotherms of different variants of SBA-15 adsorbent (Abdouss et al, 2014 ) and the corresponding key values of parameters of universal isotherm model used to fit all of the four isotherms are given in Appendix Table 2 . Similar to the isotherms shown in Figure 3 , two terms of the universal isotherm models were used to fit the data, depicting the two groups of adsorption energy sites responsible for the adsorption uptake.…”

Section: Resultsmentioning

confidence: 99%

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A Universal Mathematical Methodology in Characterization of Materials for Tailored Design of Porous Surfaces

et al. 2021

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Understanding adsorption phenomena is essential to optimize and customize the energy transformation in numerous industrial and environmental processes. The complex and heterogeneous structure of the adsorbent surface and the distinct interaction of adsorbent-adsorbate pairs are attributed to the diverse response of adsorption phenomena, measured by the state diagrams of adsorption uptake known as adsorption isotherms. To understand various forms of adsorption isotherms, the surface characteristics of the adsorbent surface with the heterogeneity of adsorption energy sites must be analyzed so that they can be modified for the tailored response of the material. Conventionally, such material synthesis is based on chemical recipes or post-treatment. However, if the adsorbent's surface characteristics and heterogeneity are known, then a directed change in the material structure can be planned for the desired results in the adsorption processes. In this paper, a theoretical and mathematical methodology is discussed to analyze the structure of various adsorbents in terms of the distribution of their adsorption energy sites. The change in their surface is then analyzed, which results in the tailored or customized response of the material.

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Section: Resultssupporting

confidence: 54%

Section: Resultsmentioning

confidence: 99%

A Universal Mathematical Methodology in Characterization of Materials for Tailored Design of Porous Surfaces

et al. 2021

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“…In addition, it causes environmental damages [1][2][3]. H 2 S can be present in petroleum and petroleum products including asphalt, residual fuel oil, mid-distillates and their blend, natural gas and LPG [4][5][6]. H 2 S is evolved…”

Section: Introductionmentioning

confidence: 99%

Determination of H2S in Crude Oil via a Rapid, Reliable and Sensitive Method

Vahid¹

2019

Anal. Method Environ. Chem. J.

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Determination of hydrogen sulfide, (H2S) in crude oil is very important due to the environmental impacts, industrial problems and legal international limitation of transportation. In the present work, H2S of crude oil is determined by liquid-liquid extraction followed by potentiometric titration. Three factors including dilution ratio of crude oil with toluene, extraction time of H2S into the caustic phase and API of crude oil was investigated via factorial design. The ANOVA results revealed that the dilution ratio, crude type and extraction time have the highest effect of the recovery of H2S from crude oil. The linear dynamic range of the method was from 1 up to 2000 ppm which can be manipulated for lower or higher concentration by further optimization of the above-mentioned parameters. This method is rapid, reliable, operator-independent which make it a useful technique for the field test of crude oil and overcome extreme uncertainty of H2S measurement.

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“…The general procedure for synthesis of SBA-3 was reported [45][46][47][48]. In this work, zinc-containing SBA-3 was synthesized via an in situ approach with some modi cations [32].…”

Section: Experimental 21 Synthesismentioning

confidence: 99%

“…One of the appropriate methods for the preparation of such sorbent is embedding of proper metal oxides such as ZnO (active part) on silicate mesoporous materials [43][44][45][46]. Three-dimensional mesoporous materials are good candidates for this goal [47][48][49][50][51]. SBA-3 has a peculiar bimodal pore system, same as SBA-15, but can be synthesized in two hours instead of two days [52].…”

Section: Introductionmentioning

confidence: 99%

H2S Removal Using ZnO/SBA-3: New Synthesis Route and Optimization of Process Parameters

2017

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Abstract. H 2 S is a major toxic compound that could be found in air, water, and fossil fuels and causes some bad e ects such as acidic rain and corrosion. In the present work, SBA-3 (Santa Barbara University no. 3) with three di erent weight percentages of ZnO, namely, 5%, 10%, and 15%, was synthesized via an in situ approach. All synthesized samples were characterized using atomic absorption spectrometry, X-Ray Di raction (XRD), nitrogen adsorption, and Transmission Electron Microscopy (TEM). The obtained results from XRD and nitrogen adsorption con rmed that all the samples almost retained their ordered structure after incorporation of ZnO nanoparticles within the mesopores of SBA-3. TEM images showed that ZnO nanoparticles were arranged along the direction of mesopores of SBA-3. Then, adsorption of H2S from a model gas was investigated. A three-factor Box-Behnken design with ve center points and one response was performed for the evaluation of e ect of three process parameters, namely, ZnO wt%, space velocity, and temperature, on the adsorption of H 2 S and a quadratic model (r 2 : 0.9185) was developed to navigate the design space. Temperature had the largest and space velocity had the lowest e ect on the breakthrough of H 2 S. The optimum breakthrough time (t bp ) was 588 min.

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Effect of the structure of the support and the aminosilane type on the adsorption of H2S from model gas

Cited by 20 publications

References 37 publications

A Universal Mathematical Methodology in Characterization of Materials for Tailored Design of Porous Surfaces

A Universal Mathematical Methodology in Characterization of Materials for Tailored Design of Porous Surfaces

Determination of H2S in Crude Oil via a Rapid, Reliable and Sensitive Method

H2S Removal Using ZnO/SBA-3: New Synthesis Route and Optimization of Process Parameters

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