Investigation of hydrogen sulfide adsorption in metallic scaffold MOF-5 nanocomposite based on activated carbon for the use of respiratory mask cartridge
Introduction: Hydrogen sulfide is one of the most important impurities in natural gas. Due to the fact that this gas is hazardous, toxic, corrosive and volatile, therefore, the removal of hydrogen sulfide has been studied using several methods. One of the most known procedures is the adsorption proc...
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Tehran University of Medical Sciences
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doaj-c9f882c66d8c48ffb2fc0ae2a747cd5a2021-09-11T06:43:40ZfasTehran University of Medical Sciencesبهداشت و ایمنی کار2251-807X2383-20882019-12-0194329345Investigation of hydrogen sulfide adsorption in metallic scaffold MOF-5 nanocomposite based on activated carbon for the use of respiratory mask cartridgeHojatolla Kakaei0Mojtaba Beygzadeh1Farideh Golbabaei2Mohammad Reza Ganjali3Mehdi Jahangiri4Sayed Jamaleddin Shahtaheri5 Department of Occupational Health Engineering, School of Public Health, Ilam University of Medical Sciences, Ilam, Iran | Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran Department of Energy, Materials & Energy Research Center, P.O. Box 14155-4777, Tehran, Iran. Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran Electrochemistry Department, Faculty of Chemistry, College of Science, University of Tehran, Tehran, Iran Department of Occupational Health Engineering, School of Public Health, Shiraz University of Medical Sciences, Shiraz, Iran Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran Introduction: Hydrogen sulfide is one of the most important impurities in natural gas. Due to the fact that this gas is hazardous, toxic, corrosive and volatile, therefore, the removal of hydrogen sulfide has been studied using several methods. One of the most known procedures is the adsorption process. In the present study, activated carbon and activated carbon-based composite scaffolds (MOF-5) were used as a cartridge mask to remove hydrogen sulfide from respiratory air. Methods and Materials: First, activated carbon (AC) was converted to powder form by ball mill, and AC / MOF-5 composite with 10%, 25%, and 40% MOF-5 to AC was synthesized from the MOF-5 metal-organic scaffold. Then, the rates of adsorption and breakthrough time using a designed setup were tested in two ranges of temperatures, humidities and concentrations. XRD, SEM and BET were used to determine the properties of composite absorbents. The Aeroqual S500 Direct-reading sensor with 0.01 ppm accuracy was used to measure the exact amount of hydrogen sulfide gas. Results: The AC/MOF-5 composite showed higher adsorption and breakthrough time compare to the other adsorbents. The Specific surface area (BET), average pore diameter, and total pore volume of the adsorbent were 814 m2 /g, 1.6795 nm, and 0.342 cm3 /g, respectively. The isotherm diagram showed that, according to IUPAC, most of the pore size of this adsorbent was classified in the micro-porous group. The maximum adsorption (mg/gS) and breakthrough time (min) were related to AC/MOF-5(40 Wt. %) adsorbent with 60.41 mg/gS (SD = 1.08) and 56.26 min (SD =2.38) at a temperature of 15 ° C, a concentration of 9.88 ppm (SD = 0.70), a moisture content of 51.06% (SD = 0.15) and a pressure drop of 51.34 mm water. By adding more than 25% MOF-5 metal-metal scaffold to activated carbon, the amount of adsorption, breakthrough time and pressure drop were increased. Conclusion: AC / MOF-5 composite adsorbent due to its porous structure, high specific surface area, and most importantly, having Zn-O-C groups increased the adsorption rate as well as the pollutant Breakthrough time. However, it showed a relatively higher pressure drop than commercial activated carbon (AC).http://jhsw.tums.ac.ir/article-1-6220-en.htmlcompositemof-5breakthrough timeadsorptionzn-bdch2s |
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language |
fas |
format |
Article |
sources |
DOAJ |
author |
Hojatolla Kakaei Mojtaba Beygzadeh Farideh Golbabaei Mohammad Reza Ganjali Mehdi Jahangiri Sayed Jamaleddin Shahtaheri |
spellingShingle |
Hojatolla Kakaei Mojtaba Beygzadeh Farideh Golbabaei Mohammad Reza Ganjali Mehdi Jahangiri Sayed Jamaleddin Shahtaheri Investigation of hydrogen sulfide adsorption in metallic scaffold MOF-5 nanocomposite based on activated carbon for the use of respiratory mask cartridge بهداشت و ایمنی کار composite mof-5 breakthrough time adsorption zn-bdc h2s |
author_facet |
Hojatolla Kakaei Mojtaba Beygzadeh Farideh Golbabaei Mohammad Reza Ganjali Mehdi Jahangiri Sayed Jamaleddin Shahtaheri |
author_sort |
Hojatolla Kakaei |
title |
Investigation of hydrogen sulfide adsorption in metallic scaffold MOF-5 nanocomposite based on activated carbon for the use of respiratory mask cartridge |
title_short |
Investigation of hydrogen sulfide adsorption in metallic scaffold MOF-5 nanocomposite based on activated carbon for the use of respiratory mask cartridge |
title_full |
Investigation of hydrogen sulfide adsorption in metallic scaffold MOF-5 nanocomposite based on activated carbon for the use of respiratory mask cartridge |
title_fullStr |
Investigation of hydrogen sulfide adsorption in metallic scaffold MOF-5 nanocomposite based on activated carbon for the use of respiratory mask cartridge |
title_full_unstemmed |
Investigation of hydrogen sulfide adsorption in metallic scaffold MOF-5 nanocomposite based on activated carbon for the use of respiratory mask cartridge |
title_sort |
investigation of hydrogen sulfide adsorption in metallic scaffold mof-5 nanocomposite based on activated carbon for the use of respiratory mask cartridge |
publisher |
Tehran University of Medical Sciences |
series |
بهداشت و ایمنی کار |
issn |
2251-807X 2383-2088 |
publishDate |
2019-12-01 |
description |
Introduction: Hydrogen sulfide is one of the most important impurities in natural gas. Due to the fact that this gas is hazardous, toxic, corrosive and volatile, therefore, the removal of hydrogen sulfide has been studied using several methods. One of the most known procedures is the adsorption process. In the present study, activated carbon and activated carbon-based composite scaffolds (MOF-5) were used as a cartridge mask to remove hydrogen sulfide from respiratory air.
Methods and Materials: First, activated carbon (AC) was converted to powder form by ball mill, and AC / MOF-5 composite with 10%, 25%, and 40% MOF-5 to AC was synthesized from the MOF-5 metal-organic scaffold. Then, the rates of adsorption and breakthrough time using a designed setup were tested in two ranges of temperatures, humidities and concentrations. XRD, SEM and BET were used to determine the properties of composite absorbents. The Aeroqual S500 Direct-reading sensor with 0.01 ppm accuracy was used to measure the exact amount of hydrogen sulfide gas.
Results: The AC/MOF-5 composite showed higher adsorption and breakthrough time compare to the other adsorbents. The Specific surface area (BET), average pore diameter, and total pore volume of the adsorbent were 814 m2 /g, 1.6795 nm, and 0.342 cm3 /g, respectively. The isotherm diagram showed that, according to IUPAC, most of the pore size of this adsorbent was classified in the micro-porous group. The maximum adsorption (mg/gS) and breakthrough time (min) were related to AC/MOF-5(40 Wt. %) adsorbent with 60.41 mg/gS (SD = 1.08) and 56.26 min (SD =2.38) at a temperature of 15 ° C, a concentration of 9.88 ppm (SD = 0.70), a moisture content of 51.06% (SD = 0.15) and a pressure drop of 51.34 mm water. By adding more than 25% MOF-5 metal-metal scaffold to activated carbon, the amount of adsorption, breakthrough time and pressure drop were increased.
Conclusion: AC / MOF-5 composite adsorbent due to its porous structure, high specific surface area, and most importantly, having Zn-O-C groups increased the adsorption rate as well as the pollutant Breakthrough time. However, it showed a relatively higher pressure drop than commercial activated carbon (AC). |
topic |
composite mof-5 breakthrough time adsorption zn-bdc h2s |
url |
http://jhsw.tums.ac.ir/article-1-6220-en.html |
work_keys_str_mv |
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