Product Analysis

Both gases and liquid oil products from the reactor were analyzed using a Hewlett- Packard GC equipped with a Supelco Plot Q column and a GC/MS, respectively. Similarly, the liquid oils could also be analyzed using a gas chromatograph with a flame ionization detector while the gaseous products were analyzed using gas chromatograph with a thermal conductivity detector. In addition, some of the car­bonaceous compounds that adhered on the cooling glass tube were eliminated using и-hexane and were measured as waxes. The mass of coke deposited on the catalysts after the degradation was determined by weight difference of the catalyst before and reheating the catalysts at 600 °C for 5 h. In addition, the amount of coke deposit on the catalyst could also be calculated by measuring the desorbed amount of carbon dioxide during temperature programmed oxidation of the used catalysts.