Overview of Current and Future Perspectives of Saudi Arabian Natural Clinoptilolite Zeolite: A Case Review

Table 2

Conditions and parameters for characterization of different materials like natural zeolites by methyl butynol catalytic test reaction [95, 99].

Conditions	Parameters
(1) Activation procedure
1.1. Oxidation in air:	= 12 ml/min
Heating rate: 1 h to 5400°C (4 K/min) airflow
1.2. Inertisation:
N2 flow	= 12 ml/min
Temperature	T = 400°C
Duration	t = 3 h
1.3. Cooling to	T = 180°C
N2 flow	= 13 ml/min
(2) Feed
Percentage volume of MBOH : hexane	95 : 5 vol%
Liquid feed flow through the capillary	= 0.03 ml/min
(3) Pressure of the gas supply (air and nitrogen)
i.e., pressure over liquid feed	p = 2 bar
Pressure of the reactor system	p = 1.3 bar
(4) Temperature program for the gas chromatography
Temperature start	50°C
Temperature rate (dT/dt)	10°C/min
Reached up to temperature	T = 100°C
Holding time	t = 12 min
(5) GC column
Type	Optima wax
Length	30 m
Film thickness	0.25 μm
Maximum temperature	Tmax = 260°C