A highly efficient MIL-101(Cr)–Graphene–molybdenum oxide nano composite for selective oxidation of hydrogen sulfide into elemental sulfur

Pourreza, Alimohammad; Askari, Saeed; Rashidi, Alimorad; Fakhraie, Saeed; Kooti, M.; Shafiei-Alavijeh, Marzieh

doi:10.1016/j.jiec.2018.11.040

Cited by 15 publications

(5 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the tenth experiment, the reduction capacity for the MIL-101(Cr)@MIPs@H 2 S adsorbent decreased by only 1% compared to the rst experiment, while the reduction capacity for the MIL-101(Cr)@NIPs@H 2 S adsorbent decreased by 9.21%. The average regeneration e ciency for H2S was close to 98.92% of the initial value, indicating a signi cant adsorption e ciency, similar to other research in this eld[62, 90,91]. Repeated adsorption and desorption can reduce the adsorption rate by destroying some identi ed sites, making them suitable for industrial-scale cyclic adsorption processes.…”

Section: Adsorption Studiessupporting

confidence: 83%

A Novel Method Of Specific Adsorption Of Hazardous Hydrogen Sulfide Gas in Gas Processes By Core-Shell Hybrid Nano Adsorbent MIL-101(Cr)@MIPs@H2S

Moradirad,

Mahabadi,

Shahtaheri

et al. 2024

Preprint

Self Cite

View full text Add to dashboard Cite

Hydrogen sulfide gas is a challenge in the oil and gas industry due to its toxicity and corrosive nature. In addition to the toxicity of H2S, it is very corrosive both in gas and when dissolved. It is oxidized when oxidized in the combustion process, and the form of SO2 causes acid rain. Adsorption using MIL-101(Cr) @NIPs/MIPs@H2S adsorbents offers a promising solution with high efficiency, low cost, and low energy consumption. This study optimized the operating parameters for efficient and cost-effective adsorption of H2S gas. Thirty experiments were conducted to analyze the impact of the operating parameters of the adsorbent (0.1 to 1 g), temperature (25 to 80°C), concentration (10 to 1000 ppm), and flow rate (40 to 100 mL/min) on the process. The evaluation was carried out to determine cause-and-effect relationships between the variables above. The molar adsorption capacity of gases in a 400 mm high, 10 mm internal diameter fixed bed was determined using the central composite design method and the Soave-Redlich-Kwong equation. FTIR, XRD, FE-SEM, and BET techniques were then used to determine the physical properties. The statistical analysis of variance results indicated that the adsorbents adhere to the quadratic model, with temperature and adsorbent dose being the primary process variables. The optimum adsorption efficiency and capacity for MIL-101(Cr)@MIPs@H2S (11 mg/g = 94.3%) is higher than that of MIL-101(Cr)@NIPs@H2S (5.97 mg/g = 9.9%) and due to a better match between the template and binding sites in the template layer, which facilitates efficient template uptake and removal. The equilibrium adsorption of all Nano-adsorbents followed the pseudo-Scott order and Langmuir isotherm models. MIL-101(Cr) @MIPs@H2S proved to be a reliable and stable adsorbent for hydrogen sulfide. Its specific adsorption selectivity for H2S resulted in a significantly higher adsorption capacity than other gases in mixed CO2 and CH4.

show abstract

Section: Adsorption Studiessupporting

confidence: 83%

A Novel Method Of Specific Adsorption Of Hazardous Hydrogen Sulfide Gas in Gas Processes By Core-Shell Hybrid Nano Adsorbent MIL-101(Cr)@MIPs@H2S

Moradirad,

Mahabadi,

Shahtaheri

et al. 2024

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…The key feature is the development of a new catalyst to selectively convert the hydrogen sulfide to elemental gas and minimize the by-products such as SO 2 . Different catalysts are studied by researchers, including carbon materials, metal oxides, and hybrids [13][14][15] Recently, Adsorptive desulfurization (ADS) obtained much attention due to overcoming the limitation of conventional HDS and ODS. Recently, Adsorptive desulfurization (ADS) obtained much attention due to overcoming the limitation of conventional HDS (e. g. high operating cost [16] ) and ODS (separation problems and not fully recoverable and non-renewable oil soluble organic acid catalysts [17] ).…”

Section: Introductionmentioning

confidence: 99%

Metal Organic Frameworks: Desulfurization Process by Engineered Novel Adsorbents

et al. 2021

View full text Add to dashboard Cite

Removal of sulfur-containing compounds from liquid and gas steams originated from various processes of chemical industries would be essential, since these compounds can be the principal sources of deterioration and environmental degradation, and pollution even at low threshold concentration levels. The metal-organic frameworks (MOFs) compromise a wideranging of chemical structure designs with adjustable pore size and high promising surface area for the desulfurization process.In this review study, the current published studies and researches about sulfur removal in liquid and gas purification processes using MOFs as highly effective adsorbents and catalysts are systematically gathered and compared. According to the broad contextual information for sulfur removal using different MOFs in this study, it is called for new insight windows opened for the advance progresses in this area and the project of new and more effective MOF-based sorbents.

show abstract

“…Selection of suitable catalyst affects the catalysts performance in terms of sulfur yield, so it imperative synthesize catalysts with high selectivity and conversion. [3,4] Metal oxides, [5][6][7] carbon materials [8,9] and hybrid catalysts [10][11][12][13][14][15][16][17][18][19] have attracted a lot of attention as catalysts for selective oxidation of H 2 S. Moreover, doping with metallic (Nb, Ag, Pt, W, Mn, Fe, V, Mn, Co, Ni and etc. ), non-metallic (C, N, P, F, etc.)…”

Section: Introductionmentioning

confidence: 99%

Doping Transition Metals into TiO₂‐CNT Nanocatalyst to Enhance the Selective Oxidation of H₂S

et al. 2020

Self Cite

View full text Add to dashboard Cite

In this research work, the transition metals (Ni, Co and W) have been doped into the TiO 2-CNT (X-TC) nanocatalysts through sol-gel method. The structure and composition of the synthesized catalysts were determined by various qualitative and quantitative techniques. Their performance was evaluated in selective oxidation of H 2 S to elemental sulfur and compared to those of the undoped TiO 2-CNT (TC). It was found that the all metals which were doped into the TC catalyst showed much better desulfurization performance than the TC. The H 2 S conversion of the catalysts followed the trend of Co5 %-TC > Ni5 %-TC > W5 %-TC ∼ TC and Co10 %-TC > Ni10 %-TC > W10 %-TC ∼ TC and the selectivity was almost higher than 99 % in all catalysts. In this regard, the 5 %Co-TC had the higher H 2 S conversion of 99.5 %, sulfur selectivity of 99.6 % and sulfur yield of 99.1 % which is attributed to the lower band gap and higher specific surface area and pore volume in comparison to the other metal-doped TC catalysts. In addition, the increase in the metal content to 10 wt. % decreased the H 2 S conversion and sulfur selectivity because the metal particles on TC deteriorated the surface area and pore volume of the catalysts. The high catalytic activity of metals doped catalysts can be attributed to doping active transition metals as active site on mesoporous support of TC.

show abstract

A highly efficient MIL-101(Cr)–Graphene–molybdenum oxide nano composite for selective oxidation of hydrogen sulfide into elemental sulfur

Cited by 15 publications

References 47 publications

A Novel Method Of Specific Adsorption Of Hazardous Hydrogen Sulfide Gas in Gas Processes By Core-Shell Hybrid Nano Adsorbent MIL-101(Cr)@MIPs@H2S

A Novel Method Of Specific Adsorption Of Hazardous Hydrogen Sulfide Gas in Gas Processes By Core-Shell Hybrid Nano Adsorbent MIL-101(Cr)@MIPs@H2S

Metal Organic Frameworks: Desulfurization Process by Engineered Novel Adsorbents

Doping Transition Metals into TiO₂‐CNT Nanocatalyst to Enhance the Selective Oxidation of H₂S

Contact Info

Product

Resources

About

A highly efficient MIL-101(Cr)–Graphene–molybdenum oxide nano composite for selective oxidation of hydrogen sulfide into elemental sulfur

Cited by 15 publications

References 47 publications

A Novel Method Of Specific Adsorption Of Hazardous Hydrogen Sulfide Gas in Gas Processes By Core-Shell Hybrid Nano Adsorbent MIL-101(Cr)@MIPs@H2S

A Novel Method Of Specific Adsorption Of Hazardous Hydrogen Sulfide Gas in Gas Processes By Core-Shell Hybrid Nano Adsorbent MIL-101(Cr)@MIPs@H2S

Metal Organic Frameworks: Desulfurization Process by Engineered Novel Adsorbents

Doping Transition Metals into TiO2‐CNT Nanocatalyst to Enhance the Selective Oxidation of H2S

Contact Info

Product

Resources

About

Doping Transition Metals into TiO₂‐CNT Nanocatalyst to Enhance the Selective Oxidation of H₂S