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

Table 3

Collected conditions and parameters for the temperature-programmed desorption of ammonia analysis, over natural zeolite [95].

Conditions	Parameters
(1) Detector
Thermal conductivity detector (TCD)	—
(2) Gas supplies
Helium with a mixture of NH3 in argon	5 vol.% NH3/Ar
(3) Sample amount	0.4 g
(4) Temperature program
Temperature start	TStart = 25°C
Temperature rate (dT/dt)	20°C/min
Reached up to temperature	T = 600°C
Holding time	t = 1 min
(5) Cooling temperature	Tcooling = 40°C
(6) Sample saturations	7 vol.% NH3/Ar
Steam: helium with a mixture of NH3 in argon temperature of sample saturation	Tsample saturation = 40°C
Holding time	tholding = 305 min
(7) Temperature increase	To 100°C
Temperature rate	20°C/min,
(8) Temperature desorbed NH3from the sample	T = 100°C–400°C