The adsorption of water by Saran charcoal

Abstract

Equilibrium isotherms for water have been measured on three samples of Saran charcoal between 10" C and 60" C. The heats of adsorption at very low surface coverage are as high as 15,000 callmole, but for most of the water adsorbed are only slightly greater than the heat of liquefaction. On desorption, there is no hysteresis loop.Water adsorbs more slowly than a hydrocarbon of comparable size. At low relative

Transesterification of Triolein over Hydrophobic Microporous Carbon with SO3H Groups

“…The isotherms for these samples are type-I patterns, which is typical of microporous solids (Figure S1 A). [10] MC andS O 3 H-MC have similar isotherms to that of the Y-zeolite, suggesting that the microporous structure formed in the sulfonated samples also reflects the originalYzeolite structure. The BET surface area of SO 3 H-MC was estimated to be % 2000 m 2 g…”

Structure and Catalysis of Cellulose‐Derived Amorphous Carbon Bearing SO3H Groups

“…The surface of the graphite is generally hydrophobic, [14] and, therefore, the H 2 O vapor adsorption-desorption isotherm of pure graphitic carbon at 328 K had a well-defined type-III character, for which the amount of adsorbed H 2 O was small at low P/P 0 (< 0.2) and steeply increased at P/P 0 = 0.5-0.6. [15] The strong affinity of CCSA-673 and 723 for H 2 O is clearly derived from the large amounts of hydrophilic functional groups. The hysteresis loop in the isotherms of CCSA-673 and 723 also supported the strong affinity for water.…”

Adsorption–desorption of water vapour on chars prepared from commercial wood charcoals, in relation to their chemical composition, surface chemistry and pore structure

“…Earlier studies [33,[41][42][43][44] have reported information on the shapes of water vapour adsorption isotherms for chars, which are in general different in comparison with activated carbons. Investigations by Dacey et al [41,42] on the adsorption of water vapour by Saran charcoal at different temperatures reported well-defined isotherms of type V with a steep increase at a medium relative pressure (p/p 0 ≈ 0.5-0.6).…”