Table 2. Relevant Properties of Adsorbates Mentioned in This Work^{14,54,355−364}.

	Tm	Tb	dkin	Polarizability	Dipole moment	Quadrupole moment
Molecule	(K)	(K)	(Å)	(10–25 cm3)	(10–18 esu cm)	(10–26 esu cm2)
H2	18.6	20.3	2.83–2.89	8.042	0	0.662
D2	13.8	23.6	2.83–2.89	7.954	0	–
H2O	273.1	373.2	2.64	14.5	1.8546	–
N2	63.1	77.4	3.64–3.80	17.403	0	1.52
O2	54.4	90.2	3.47	15.812	0	0.39
CO	68.1	81.7	3.69	19.5	0.1098	2.50
CO2	216.6	216.6	3.30	29.11	0	4.3
CH4	90.7	111.2	3.76	25.93	0	0
C2H4	104.0	169.4	4.16	42.52	0	1.50
C2H6	90.35	184.6	4.44	44.3–44.7	0	0.65
Ethanol	159.1	351.8	4.53	51.1–54.1	1.69	–
C3H6	87.9	225.5	4.67	62.6	0.366	–
C3H8	91.45	231.0	4.30–5.12	62.9–63.7	0.084	–
Acetone	178.5	329.2	4.60–4.79a	63.3–64.0	2.88	–
n-Butane	134.8	272.7	4.69	82	0.05	–
Isobutane	113.5	261.3	5.28	81.4–82.9	0.132	–
1-Butene	88.8	266.9	4.46	81	0.36–0.44	–
cis-2-Butene	133.9	276.9	4.2–4.94	82	0.3	–
trans-2-Butene	167.3	274.0	4.3–4.6	81.82	0	–
1,3-Butadiene	164.3	268.6	4.31–5.2	86.4	0	–
Isobutene	132.5	266.3	4.84	80	0.5	–
1-Butanol	183.3	390.6	4.63a	–	1.65	–
n-Pentane	143.3	309.2	4.50	99.9	0	–
Isopentane	113.3	301.0	5.0	–	0.13	–
Neopentane	256.6	282.7	6.2–6.46	102.0	0	–
n-Hexane	177.8	341.9	4.3	119	0	–
2-Methylpentane	119.5	334.0	5.5	–	0.1	–
2,3-Dimethylbutane	173.3	331.2	6.2b	–	–	–
2,2-Dimethylbutane	144.3	322.9	6.3	–	–	–
n-Heptane	182.6	371.6	4.3	136.1	0	–
3-Methylhexane	154.9	365.0	5.9b	–	–	–
2,3-Dimethylpentane	82.6	362.9	6.2b	–	–	–
2,4-Dimethylpentane	153.9	353.7	5.8b	–	–	–
m-Xylene	225.3	412.3	6.8c, 7.1d	142	0.37	–
o-Xylene	248.0	417.6	6.8c, 7.4d	145	0.64	–
p-Xylene	286.4	411.5	5.8c, 6.7d	143	0.1	–
Ethylbenzene	178.18	409.4	5.8c, 6.7d	142	0.59	–

^aCritical diameter from ref (359).

^bCritical molecular w-h parameter from ref (361).

^cTaken from ref (355).

^dTaken from ref (14).