Abstract
Six Co-Rh/Fe3O4 catalysts with different cobalt loadings were prepared by the co-precipitation of RhCl3, Co(NO3)2, and Fe(NO3)3 using Na2CO3 as the precipitant. These catalysts were tested for dicyclopentadiene (DCPD) hydroformylation to monoformyltricyclodecenes (MFTD) and diformyltricyclodecanes (DFTD). The results showed that the MFTD formation rate increased with increasing cobalt loading, whereas the DFTD formation rate initially increased and then decreased when the cobalt loading was greater than twice that of Rh. The DFTD selectivity was only 21.3% when monometallic Rh/Fe3O4 was used as the catalyst. In contrast, the selectivity was 90.6% at a similar DCPD conversion when the bimetallic 4Co-2Rh/Fe3O4 catalyst was employed. These catalysts were characterized by temperature-programmed reduction (TPR), temperature-programmed desorption (TPD), and thermogravimetric and differential thermal analyses (TG-DTA). The results obtained by these complimentary characterization techniques indicated that adding cobalt to the Rh/Fe3O4 catalyst enhanced the Rh reducibility and dispersion; the Rh reducibility was easily altered, and increasing the cobalt loading improved the Rh dispersion. It was concluded that the enhanced catalytic performance with increasing cobalt loading might be due to the formation of a more reactive Rh species with a different Rh–phosphine interaction strength on the catalyst surface.
Highlights
Because of the worldwide dependence on non-renewable fossil fuel reserves, society is faced with the challenge of finding alternative fuel sources for energy production [1,2,3,4,5]
The reaction was performed at 95 ◦ C and 4 MPa for 1.5 h to convert DCPD to MFTD with a selectivity of greater than 99%
Six different Rh-based catalysts were prepared on Fe3 O4 supports by co-precipitation, and their catalytic performances in DCPD hydroformylation were evaluated
Summary
Because of the worldwide dependence on non-renewable fossil fuel reserves, society is faced with the challenge of finding alternative fuel sources for energy production [1,2,3,4,5]. Until fossil fuels can be completely replaced, a more practical strategy is to better utilize existing fossil fuel resources. In lieu of this approach, using industrial side products to produce useful chemicals is another important strategy; for example, the hydroformylation of dicyclopentadiene (DCPD), an ethylene cracking side product, yields monoformyltricyclodecenes (MFTD) and diformyltricyclodecanes (DFTD). InDFTD turn, DFTD and TDDMO can be used as starting the starting materials in the synthesis various agricultural chemicals, lubricating oils, plasticizers, pharmaceuticals, and perfumes [7,8]. Of various agricultural chemicals, lubricating oils, plasticizers, pharmaceuticals, and perfumes [7,8]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
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 call
