Abstract
Olefin was produced with a non-conventional method using an electric field exerted on zeolites. The lattice oxygen mobility increases with a decrease in band gap, leading to an increase in olefin yield. By impregnating the transition metal, an increase in carrier concentration occurs. The external electric field changes the Fermi level. In this research, HZSM-5 was placed in an external DC electric field with strength appropriate for studying its catalytic performance. The Fermi level changed with the metal type and the external electric field. The increase in permittivity with temperature extracts higher energy from the external electric field. In catalytic reactions assisted by the external DC electric field, at 510 °C, the yield was approximately equal to the yield in a conventional reaction at 650 °C. With regard to TGA, in the catalytic reaction assisted by the external DC electric field, the produced coke declined. The results showed that the maximum yield value (50.54%) and conversion (92.81%) were be obtained at 650 °C with an input electrical current of 12 mA, a gap distance of 10 mm and a metal loading of 4 wt. % over FeHZSM-5.
Highlights
Ethylene and propylene are raw materials used in the production of plastic materials, synthetic polymers, and a varied range of chemicals [1,2]
We studied the role of a direct current (DC) electric field on the HZSM-5 impregnated with transition metal oxides to obtain high catalytic activity
For the impregnated HZSM-5, the XRD patterns were approximately similar to HZSM-5, which shows that the impregnation had no effect on HZSM-5 structure [29]
Summary
Ethylene and propylene are raw materials used in the production of plastic materials, synthetic polymers, and a varied range of chemicals [1,2]. Demand for ethylene production is rapidly increasing. In China, ethylene production was 10 Mt in 2007 and 15 Mt in 2011. Propylene is the second largest raw material [3]. A conventional method for production of olefins is steam cracking. Steam cracking has been the most common method of producing light olefins for
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