Properties of Raw Saudi Arabian Grey Kaolin Studied by Pyrrole Adsorption and Catalytic Conversion of Methylbutynol

Table 1

Experimental conditions of pyrrole-TPD.

Pyrrole-TPD conditions	Description
Sample amount and particle size	0.3 g with a particle size distribution of 150–250 μm
Instrumented detector	Thermal conductivity detector (TCD)
Conditioning flow	Helium was utilized as carrier gas (50 mL/min), heated to 270°C, with a heating rate of 15°C/min. After that, a helium flow filled with pyrrole at 30°C was passed over the conditioned sample at a flow rate of 50 mL/min, for 30 min
Temperature-programmed desorption of pyrrole	Sample was then investigated up to 270°C with a heating rate of 15°C/min