Abstract
This study aims to produce ethylene using the calcium carbide route, acetylene from calcium carbide and then selective hydrogenation of the high-concentration acetylene to ethylene. A series of catalysts with different supports, such as Al2O3, SiO2 and MCM-41, were prepared using the ethylene glycol reduction method and their catalytic properties for high-concentration acetylene hydrogenation of calcium carbide to ethylene were studied by transmission electron microscopy, X-ray powder diffraction and thermogravimetry, among others. The results show that the small particle size and uniform dispersion of palladium (Pd) particles in the Pd/MCM-41 catalyst produced the highest ethylene yield of 62.09%. Then, the conditions for the basic reaction, such as reaction temperature and space velocity, were optimized using MCM-41 as a support. The yield of ethylene after condition optimization was as high as 82.87%, while the loading of Pd was 0.1%.
Highlights
Ethylene is an important chemical product and the demand for ethylene has increased annually
In the process of acetylene hydrogenation via the calcium carbide route, the study on green oil is necessary because the high-concentration acetylene is polymerized under unfavourable conditions to form green oil covering the surface of the catalyst, resulting in deactivation of the catalyst [21,22]
We found that the diffraction peaks of Pd/SiO2 catalysts were sharper than those on the Pd/MCM-41 catalyst
Summary
Ethylene is an important chemical product and the demand for ethylene has increased annually. The traditional method of producing ethylene is hydrocarbons cracking [1,2,3]. This production process is greatly limited by the cost and the nature of crude oil. Due to the low cost of coal and quicklime raw materials, acetylene from the calcium carbide route was available and inexpensive [7], especially in regions that have plenty of coal such as China. The production of ethylene from acetylene hydrogenation may be a good choice due to the significance of ethylene and abundance of acetylene.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
