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The effect of Fe 3+ doping level on the surface properties and catalytic performance of a series of iron-doped titanium oxide catalysts (1–7 mol% Fe 3+ ) prepared using an acid-catalyzed sol-gel method was investigated in oxidative dehydrogenation of ethylbenzene with CO 2 . The characterization of catalysts was carried out by means of x-ray powder diffraction (XRD), temperature programmed reduction (TPR), and the method of Brunauer, Emmett, and Teller (BET). It was found that the capacity of isolated Fe 3+ centers in titania matrix is responsible for the catalytic performance; the catalysts exhibit the best activity at the loading level of Fe 3+ , about 3 mol%. In addition, it was shown that the appropriate pore size of the catalysts ranges from 5 nm to 25 nm; the selectivity to styrene increases with an increase in the specific surface area of the appropriate pores. [ABSTRACT FROM AUTHOR]

The hydropyrolysis of light hydrocarbons were carried out in H2/Ar plasma jet at atmosphere pressure and average temperature between 1500K and 3000K. The raw material was Liquefied Petroleum Gas. The experimental results show that among all the pyrolysis products, major product is acetylene. Carbon black is the byproduct. The yield and selectivity of acetylene can reach 74%, 80%, respectively. Carbon black is characterized with XRD, TEM, and adsorption-and-desorption of liquid nitrogen, respectively. [ABSTRACT FROM AUTHOR]