Oligomerization of endo-dicyclopentadiene using a mesoporous catalyst in a fixed-bed reactor

Abstract

The oligomerization of endo-dicyclopentadiene (endo-DCPD) over a mesoporous catalyst in a continuous-flow reactor at elevated pressure was studied to produce tricyclopentadiene (TCPD) and tetracyclopentadiene (TeCPD). The mesoporous material prepared from zeolite beta (MMZ Hb ) was utilized as a catalyst. In addition, this study focused on the catalytic performance of the regenerated catalyst in comparison with the fresh catalyst. The TCPD and TeCPD were continuously produced through DCPD oligomerization over the MMZ Hb catalyst in a fixed bed reactor. At early time-on-stream, the conversion of endo-DCPD, the yield of TCPD and TeCPD, and the isomerization selectivity of TCPD in the fixed bed reactor were comparable to those in the batch-type reactor. The yield of oligomer containing TCPD and TeCPD decreased drastically from 28.5 % at 3 h time-onstream to 21.5 % at 12 h time-on-stream, indicating that the catalyst was significantly deactivated. The in situ calcination in air flow at 500°C was found to be effective for the regeneration of the used MMZ Hb catalyst.

Catalytic Conversion of Dicyclopentadiene into High Energy Density Fuel: A Brief Review

“…The catalyst was heavily deactivated due to the formation of higher molecular weight hydrocarbons. After regeneration, it was found that the calcination temperature of 500 °C was effective, which maintained the activity of the catalyst with no appreciable difference from that of the fresh catalyst …”

“…After regeneration, it was found that the calcination temperature of 500 °C was effective, which maintained the activity of the catalyst with no appreciable difference from that of the fresh catalyst. 53 Zou et al 16 studied the Pd-B/γ-Al 2 O 3 catalyst as a function of various conditions in the catalyst pretreatment and its impact on the hydrogenation of TCPD into THTCPD. The reaction mechanism involves the conversion of TCPD to DHTCPD, finally hydrogenated into THTCPD at 130−150 °C with 1.5 MPa of hydrogen pressure.…”