Abstract
Abstract Promoting ZrO 2 with Na + Cl − via a sol-gel process, an effective catalytic system is obtained which is more active, selective and stable with time-on-stream than unpromoted ZrO 2 , or any other alkali chloride promoted ZrO 2 in the oxidative coupling of methane at 750°C, atmospheric pressure, CH 4 /O 2 = 4 and a space velocity of 7500 cm 3 g −1 h −1 . Operating at a low partial pressure of the reactants (CH 4 +O 2 = 91.2 Torr, 1 Torr = 133.3 Pa) and the aforementioned conditions, a C 2 yield of 14.1% is obtained. The performance of the alkali metal chloride promoted ZrO 2 is found to depend strongly on the nature of the cation, the method of catalyst preparation, the promoter content and the reaction conditions (temperature, partial pressure, CH 4 /O 2 ratio and space velocity). The relationship between the catalytic performance and the physico-chemical properties of Na + -ZrO 2 -Cl − revealed by X-ray diffraction and X-ray photoelectron spectroscopy is explored.
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.
