Table 3.

Langmuir and Freundlich fitting parameters of C2-4 acids on zeolites.

Adsorbate	Sample	Langmuir			Freundlich
		R 2	q m	K 1	R 2	n	K 2
acetic acid	MFI	0.96	17.86	0.0361	0.89	2.06	0.2018
	β	0.92	21.53	0.0277	0.89	1.95	0.1920
	Y	0.95	15.19	0.0365	0.88	1.75	0.0787
	MOR	0.92	14.16	0.0400	0.89	1.81	0.0871
propanoic acid	MFI	0.93	46.28	0.0133	0.87	1.99	0.4576
	β	0.95	50.74	0.0125	0.89	2.02	0.5255
	Y	0.95	25.01	0.0249	0.89	1.95	0.2232
	MOR	0.94	24.64	0.0244	0.89	1.90	0.1917
butyric acid	MFI	0.93	61.53	0.0100	0.89	1.99	0.6041
	β	0.94	69.43	0.0091	0.87	2.04	0.7529
	Y	0.93	40.02	0.0157	0.88	2.06	0.4561
	MOR	0.97	35.28	0.0189	0.89	2.14	0.4706