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Abstract:
Fuels with extremely low sulfur content are highly desirable as a result of the growing environmental concerns. In this work, a simple and novel method to connect a ZrIV open site with polyoxometalates (POM) was introduced, which was used as an effective heterogeneous catalyst for oxidative desulfurization of fuel oil. ZrPTAXBTC composites were synthesized conveniently and rapidly at room temperature and atmospheric pressure using pyromellitic acid (BTC) as a linker. The products were characterized by XRD, TGA, FT-IR, NMR, SEM, and N2 adsorption-desorption, which verified the successful preparation of ZrPTAX-BTC composite. ZrPTAX-BTC catalyst has high content of active components, and has excellent catalytic activity in oxidative desulfurization reaction. It achieves rapid and complete desulfurization under mild reaction conditions (T = 50 degrees C, O/S = 4, t = 30 min, DBT removal rate reaches 100%). Further studies show that the synergistic catalysis of a ZrIV open site and PTA molecule is the reason for its high catalytic activity, in which the ZrIV open site promotes the decomposition of H2O2 into O2middot, PTA molecules combine with O2middot to form peroxytungstate (W(O2)n), and the close distance between the ZrIV open site and PTA in ZrPTAX-BTC allows H2O2 to be efficiently utilized. In addition, ZrPTAX-BTC can be easily recovered and reused for at least five times, and only a slight decrease in catalytic activity has occurred. Therefore, ZrPTAX-BTC has high catalytic activity, high stability, and good reusability, which is a potential catalyst that can realize the application of fuel ultradeep desulfurization.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
ISSN: 0888-5885
Year: 2021
4 . 3 2 6
JCR@2021
3 . 8 0 0
JCR@2023
ESI Discipline: CHEMISTRY;
ESI HC Threshold:117
JCR Journal Grade:2
CAS Journal Grade:3
Cited Count:
WoS CC Cited Count: 3
SCOPUS Cited Count: 5
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 2
Affiliated Colleges: