Abstract
The hydrodesulfurization (HDS) of dibenzothiophene (DBT) was studied over a series of Pd catalysts supported on Zr-based metal-organic frameworks, UiO-66 and its amino-functionalized analogues (UiO-66-xNH2, where x represents the molar ratio of 2-amino-1,4-benzenedicarboxylic acid/1,4-benzenedicarboxylic acid) to gain an insight into metal-support interactions. Pd/UiO-66 behaved better than a Pd/γ-Al2O3 catalyst and a Pd/MCM-41 catalyst. The presence of amino groups showed minor negative influence on the conversion of DBT but significantly affected the activities and selectivities of different reaction pathways. With the increase in the content of amino groups, the direct desulfurization (DDS) pathway activity of the Pd/UiO-66-xNH2 catalysts increased, while their hydrogenation pathway activity decreased. This provides an approach for the regulation of the pathway selectivities of Pd HDS catalysts. Based on kinetic analysis and characterization results, we propose that the amino groups affect the HDS performance of Pd/UiO-66 mainly by affecting the adsorption of reacting molecules on metal particles.
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.
