Ethisterone

Here we reported a MOF-based bimetal catalyst, Cu-MOF-253-Pd, as an efficient, robust and recyclable catalyst for Sonogashira coupling reaction between (hetero)aryl halides and terminal alkynes for the preparation of di-substituted acetylenes.Broad substrate scope, including late-stage functionalization of complex mol., has been demonstrated, and the synthetic applications further displayed high turnover numbers up to 4794, scalability, recyclability and robustness of the reaction system.

The Water Cooled Ceramic Breeder (WCCB) blanket is one of the candidate blanket for China Fusion Engineering Test Reactor (CFETR).The first wall, as the key component of WCCB blanket, experiences high heat flux from the plasma on one side.Parallel counterflow square channels and pressurized water are used for cooling.The coolant flows through these channels to remove the high heat flux from the plasma.Flow instability may occur when water undergoes two-phase flow during steady state or under some accidents.This threatens the safe operation of the fusion reactor.This paper investigates the flow instability of the parallel channels in the CFETR WCCB blanket FW.Firstly, one sided heat flux is more prone to flow instability compared to uniform heat flux, with the instability boundary deviating up to 35.8 %.In addition, the flow instability boundary of the two-channel model differs from that of the full FW model by 6.5 %.Secondly, the design of the two-channel test section was completed based on the anal. in the previous section, and the measurement points and power supply introduced.Finally, Relap5 simulations were performed on the completed test section design to guide the experimentsThe simulation results show that under typical CFETR WCCB blanket conditions, flow instability is characterized by out-of-phase oscillations.Flow instability boundaries for different operating conditions are presented in the subcooling number (N_sub) and phase change number (N_pch) plane.The boundary for flow instability induced by flow loss depends on operating pressure (OP) and inlet subcooling.Under pulse operation and I-type edge localized modes (ELM) conditions, the flow instability does not pose a significant threat to the safety of the WCCB blanket.