Adsorption Behavior of N2, Water, C6 Hydrocarbons, and Bulkier Benzene Derivative (TMB) on Na–X Zeolite and Its K+-, Rb+-, and Cs+-Exchanged Analogues

Joshi, Upendra A.; Joshi, P.N.; Tamhankar, Shubhada; Joshi, Virendra; Shiralkar, V. P.

doi:10.1006/jcis.2000.7330

Cited by 19 publications

(9 citation statements)

References 18 publications

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“…All samples were characterized three times. Adsorbed amount of n -hexane in FAU-type powder obtained in this work (180 mg/g anhydrous zeolite ) is in good agreement with values reported in literature ranging from 181 to 186 mg/g anhydrous zeolite [ 15 , 39 ]. Adsorbed amounts of n -hexane between 131 and 175 mg/g anhydrous zeolite were measured for all zeolite coatings in powder form ( Table 5 ).…”

Section: Resultssupporting

confidence: 91%

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Efficient Removal of Volatile Organic Compounds by FAU-Type Zeolite Coatings

Diboune

Nouali

Soulard³

et al. 2020

Molecules

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Silicone and pure organic binders were used to develop FAU-type zeolite coatings applied on pre-treated aluminum substrates by using a spraying method and then cured under specific conditions. The influence of the amount of binder on adhesion properties of zeolite coatings was first investigated to determine the optimum ratio between zeolite and binder. Zeolite coatings were then elaborated with a high zeolite content (between 70 and 80 wt.%) to ensure high adsorption capacities. The amount of binders involved in different zeolite coatings was sufficient to achieve interesting adhesion and cohesion properties. The accessibility of zeolite microporosity was studied by nitrogen adsorption-desorption measurements, which revealed a very small or no loss of the micropore volume for the optimized coatings. Volatile Organic Compounds (VOCs) adsorption measurements were carried out using n-hexane as probe molecule. FAU-type zeolite in powder form adsorbs 180 mg/ganhydrous zeolite, whereas the amounts of n-hexane adsorbed by zeolite coatings ranged from 131 to 175 mg/ganhydrous zeolite.

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Section: Resultssupporting

confidence: 91%

“…n -Hexane is used as probe molecule to simulate the organic volatile pollutant because it is one of the contaminants identified by NASA and CNES. This probe molecule is easy to handle and has often been used to study adsorption capacities of organic pollutants by zeolites [ 39 , 40 ].…”

Section: Introductionmentioning

confidence: 99%

Efficient Removal of Volatile Organic Compounds by FAU-Type Zeolite Coatings

Diboune

Nouali

Soulard³

et al. 2020

Molecules

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“…CC samples (free of the edible part) were first dried in sunlight for two days and further oven-dried at 55 °C for 16 h. The dried CC was crushed to the powder form and again kept in oven at 55 °C for 16 h followed by vacuum drying at 120 °C for 4 h and stored in an air-tight lid container. Basic zeolite and NaX (Si/Al = 1.2) was synthesized using the known procedure . Various aromatic monomers such as guaiacol (99%), 2-methoxy-4-methylphenol (98%), pyrocatechol (99%), resorcinol (99%), 2,6-dimethoxyphenol (99%), 4-hydroxy benzyl alcohol (99%), diethylterephthalate (99%), 2,4-di- tert -butylphenol (99%), acetoguaiacone (98%), 4-hydroxy-3-methoxybenzyl alcohol (98%), 1,2,4-trimethoxybenzene (97%), vanillin (99%), eugenol (99%), and 3,4-dimethoxyphenol (99%) used for GC calibration were purchased from Sigma-Aldrich, Alfa Aesar, and TCI chemicals.…”

Section: Methodsmentioning

confidence: 99%

“…Basic zeolite and NaX (Si/Al = 1.2) was synthesized using the known procedure. 35 Various aromatic monomers such as guaiacol (99%), 2-methoxy-4methylphenol (98%), pyrocatechol (99%), resorcinol (99%), 2,6dimethoxyphenol (99%), 4-hydroxy benzyl alcohol (99%), diethylterephthalate (99%), 2,4-di-tert-butylphenol (99%), acetoguaiacone (98%), 4-hydroxy-3-methoxybenzyl alcohol (98%), 1,2,4-trimethoxybenzene (97%), vanillin (99%), eugenol (99%), and 3,4-dimethoxyphenol (99%) used for GC calibration were purchased from Sigma-Aldrich, Alfa Aesar, and TCI chemicals. All the chemicals were used as received.…”

Section: Methodsmentioning

confidence: 99%

Depolymerization of Lignin Using a Solid Base Catalyst

Chaudhary

Dhepe

2019

Energy Fuels

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Lignin extraction from lignocellulosic biomass has attracted considerable attention for an alternative production of sustainable fuels and chemicals. We report the lignin isolation from coconut coir using Klason, organosolv, and soda methods and the depolymerization of isolated lignin to value-added chemicals using a solid base catalyst. The yield of isolated lignin by the Klason method was found to be about 4 to 6 times higher than that by other methods. The structure of isolated Klason lignin (CC-KL), organosolv lignin (CC-ORGL), and soda lignin (CC-SL) was studied using attenuated total reflection (ATR), NMR, microanalysis, and so forth. The monomer molecular formula derived from microanalysis suggested that coir lignin is rich in guaiacyl units. ATR and 13C NMR clearly indicate that CC-ORGL contains more C–C bonds compared to CC-KL and CC-SL. Subsequently, these isolated lignins were depolymerized over a solid base catalyst (NaX) under atmospheric pressure. CC-SL shows a high yield of aromatic products (28%) compared to CC-ORGL and CC-KL. In order to develop a sustainable future technology, one-pot depolymerization of coconut coir was performed which resulted in a high yield (64%) of aromatic products.

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“…Ion-exchange properties of zeolite X are mainly referred to its use for removal of heavy metal ions [3,4] and radioactive ions [5,6] from waste solutions, but also for improvement of its absorption [7] and catalytic abilities [8][9][10]. Because of large pore diameter (0.74 nm) zeolite X is an excellent absorbent for different gasses such as hydrogen [7], carbon oxide, methane [11], oxygen, argon and nitrogen [11,12] and vapours such as water, hydrocarbons and benzene [13]. Zeolite X exchanged with different cations can also be used as catalyst for hydrodechlorination of carbon tetrachloride [14], isomerisation of 1-butene [8], synthesis of ammonia [9], oxidation of hydrocarbons [10], etc.…”

Section: Introductionmentioning

confidence: 99%