Ni-Mo hydrodesulfurization agent is activated to acclimatized gas, abounding petroleum gas,refinery gas.Strong acerbic sites on the credible of mesoporous MCM-41 were generated by ion-exchanging siliceous MCM-41 with attenuated HNO3 band-aid (0.5 M). The XRF affirmation indicates that a lot of of the sodium cations absolute in MCM-41 can be removed by the proton exchange, and dealuminization was empiric during the proton exchange. The acidity of the mesoporous abstracts was characterized by bureau of NH3-TPD and the Hammett indicators. It is arise that new able acerbic sites (-5.6 > H0 > -8.2) were generated afterwards the ancient 2 h of ion bargain and that the after ion exchanges had little aftereffect on the absinthian properties. XRD patterns of the mesoporous abstracts advertise that the analysis of siliceous MCM-41 was bigger by HNO3 ion exchange. If Ni-Mo hydrodesulfurization abettor sulfides were authentic on the able solid acerbic (H+-MCM-41), top accomplishment in the hydrodesulfurization (HDS) of dibenzothiophene (DBT) was observed. However, the HDS action was decreased while the selectivity of biphenyl (BP) was increased, if H+-Si-MCM-41 was ion exchanged with Na2CO3 aqueous solution. TPR profiles of the authentic Ni-Mo oxides accede that the absinthian accomplishments of the supports abundantly admission the hydrogenation activities of the bimetallic oxides. The top accomplishment of H+-MCM-41-supported Ni-Mo catalysts may be attributed to the added hydrogenation activity.
The role of nickel in the action of bottomless Ni-Mo hydrodesulfurization abettor hydrodesulfurization catalysts
A alternation of bottomless nickel-molybdenum sulfide catalysts accoutrement the ambit 0–100 atom% nickel has been able by connected coprecipitation. Highly broadcast Ni3S2 is appropriate to play a role in hydrogen activation, appointment protons and electrons to the MoS2, and this may anatomy the o rigin of the accessory mechanism. The acceptable roles of the apostle are summarized.
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