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Keggin-type molybdovanadophosphoric acids loaded on ZSM-5 zeolite as a bifunctional catalyst for oxidehydration of glycerol
Molecular Catalysis ( IF 4.6 ) Pub Date : 2018-03-20 , DOI: 10.1016/j.mcat.2018.02.015
Satoshi Suganuma , Takuya Hisazumi , Kohtaro Taruya , Etsushi Tsuji , Naonobu Katada

Glycerol is a promising renewable feedstock for the manufacture of C3 derivatives. We investigated the one-pass oxidehydrarion of glycerol through the dehydration of glycerol into acrolein, followed by the oxidation of acrolein. A novel bifunctional catalyst for this reaction was prepared by loading the Keggin-type molybdovanadophosphoric acid H3+xPVxMo12-xO40 (x = 0–3) on ZSM-5 (MFI) zeolite (Si/Al = 45) exhibiting both dehydration and oxidation activity. H5PV2Mo10O40 and H6PV3Mo9O40 were stable and dispersed on ZSM-5 zeolite, and the acidic property of the ZSM-5 zeolite was retained. The oxidehydration of glycerol was catalyzed by H5PV2Mo10O40 loaded on the ZSM-5 zeolite with high selectivity of acrylic acid. In-situ IR analysis suggests that acrolein molecules adsorbed on H5PV2Mo10O40/ZSM-5 were converted into acrylic acid due to the inhibition of side-reactions such as polymerization and auto-condensation, which induced coke formation, compared with the other Mo and V-based oxides loaded on ZSM-5 zeolite.



中文翻译:

负载在ZSM-5沸石上的Keggin型钼钒磷酸作为双官能团的甘油氧化水合催化剂

甘油是用于生产C3衍生物的有前途的可再生原料。我们研究了通过甘油脱水成丙烯醛,然后氧化丙烯醛的甘油单程氧化氢水合反应。通过将Keggin型钼钒磷磷酸H 3+ x PV x Mo 12- x O 40x  = 0-3)负载在ZSM-5(MFI)沸石(Si / Al = 45)上,制备了用于该反应的新型双功能催化剂。)同时具有脱水和氧化活性。H 5 PV 2 Mo 10 O 40和H 6 PV 3 Mo 9 O 40它们稳定并分散在ZSM-5沸石上,并保持了ZSM-5沸石的酸性。负载在ZSM-5沸石上的H 5 PV 2 Mo 10 O 40具有高的丙烯酸选择性,可催化甘油的氧化。-原位IR分析表明,丙烯醛分子吸附在ħ 5 PV 210 ö 40 / ZSM-5转化为丙烯酸由于副反应如聚合和自动缩合,从而诱发焦炭形成的抑制,相比并在ZSM-5沸石上负载其他基于Mo和V的氧化物。

更新日期:2018-03-20
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