Adsorption Equilibria of Normal Paraffins on 5A Molecular Sieve

Sorbate densities on 5A zeolite above and below the critical conditions: n alkane data evaluation and modeling

“…The saturated liquid densities of Gupta et al (1980), Alkandary et al (1995), Sundstrom and Krautz (1968), and Jasra and Bhat (1987) are plotted in Fig. 6 together with the theoretical values calculated using (6).…”

“…First, the adsorbent as reported in the various papers is in either crystalline 5A form Author n-alkanes on 5A zeolite Alkandary et al (1995) dodecane, hexadecane and eicosane Doetsch et al (1974) h e p t a n e Gupta et al (1980) pentane, hexane, heptane and octane Jasra andBhat (1987) octane, nonane, decane, undecane, dodecane, tridecane, tetradecane, hexadecane, octadecane Loughlin (1970) methane, ethane propane & butane Loughlin et al (1990) methane, propane, butane Mentasty et al (1991Mentasty et al ( , 1994) methane Moeller et al (2006) butane, hexane Miano (1996) hexane, octane, decane, tetradecane, hexadecane Nam et al (2005) methane, ethane Pal et al (1983) heptane, dodecane Peterson and Redlich (1962) pentane, heptane, decane, hexadecane Rolniak andKobayashi (1980) methane Schirmer et al (1968) decane, undecane, dodecane, tridecane, tetradecane, octadecane Rodriguez (1997a, 1997b) h e x a n e Stroud et al (1976) methane Sundstrom and Krautz (1968) heptane, decane, dodecane and tetradecane Vavlitis (1978) pentane, octane, decane Zuech et al (1983) methane Mehta and Danner (1985) Dubinin (1975) Group 3 Cook and Basmadjian (1965) u and w are parameters for tangent to ln V S vs. ln T curve at T b only or pellets of 5A crystals with 20% binder [Linde 5A] or without binder [Grace]. It is assumed there is no adsorption of n-alkane on the binder.…”

“…Curves are for theoretical plot of q max versus reduced temperature T r calculated using (6) for C 16 (top curve) and C 7 n-alkanes. Data of Sundstrom and Krautz (1968) [C 7 , C 10 , C 12 & C 14 ], Alkandary et al (1995) [C 8 , C 12 , C 16 & C 20 ], Jasra and Bhat (1987) [C 8 -C 14 , C 16 & C 18 ] and Gupta et al (1980) [C 5 , C 6 , C 7 & C 8 ] the batches of 5A molecular sieve used were variable. Sundstrom et al used two different batches of Linde 5A, one of which appears to greatly exceed the saturation loading as shown in the Fig.…”

Automated Monitoring of the Establishment of the Adsorption Equilibrium: Adsorption of Polyethylene from 1,2,4‐Trichlorobenzene onto a Zeolite at Temperature 140∘C

“…In most cases, sampling and measurement are performed manually. In such a way, adsorption isotherms of alkanes [ 8 – 12 ], saccharides [ 13 ], phenol [ 14 ], polymers [ 7 , 15 – 18 ], and peptides [ 19 ] in various solvent-sorbent systems have been determined.…”

“…For example, polyethylene was adsorbed from 1,2,4-trichlorobenzene on zeolite SH-300 at a temperature of 140°C [ 24 ]. Although the adsorption of n-alkanes (oligomers of PEs) from liquids onto zeolites is a known phenomenon [ 8 – 12 , 27 , 28 ] the adsorption of PE on zeolites is a novel effect. PE is formed from the long chains, which in solutions form solvated shells of an irregular, approximately spherical shape.…”