Effect of acidic and metallic sites on the catalytic performance of Pd/ZSM-5 catalysts in the one-step synthesis of mibk

Yang, Piaoping; Shang, Yongjia; Wang, Jun; Yu, Jianfeng; Wu, Tonghao

doi:10.1007/s11144-007-5136-y

Cited by 6 publications

(4 citation statements)

References 12 publications

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“…7. 20 In our work, the content of Pd might be too small to cause any inuence on the acidity of ZSM-5. Yang et al had reported that for the ZSM-5 loaded with high Pd content, large Pd particles could block the pores or cover the a Micropore volume is estimated using the t-plot method.…”

Section: Catalyst Characterization and Testsmentioning

confidence: 67%

“…This journal is © The Royal Society of Chemistry 2015 acid sites causing the decrease of acid sites. 20 In our work, the content of Pd might be too small to cause any inuence on the acidity of ZSM-5. Adebajo et al had reported that the catalyst with highly reduced Brönsted acidity could minimize the occurrence of the side reaction of methanol to olens and enhance the methylation of benzene with methanol.…”

Section: Catalyst Characterization and Testsmentioning

confidence: 67%

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Promoting effects of MgO and Pd modification on the catalytic performance of hierarchical porous ZSM-5 for catalyzing benzene alkylation with methanol

Lyu

Cen

et al. 2015

RSC Adv.

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The effect of MgO and Pd modification on the catalytic performance of hierarchical porous ZSM-5 for benzene alkylation with methanol was investigated. The results indicated that the introduction of MgO could reduce the Brönsted acid sites which suppressed the side reaction of methanol to olefins and in turn effectively promoted the alkylation of benzene. However, the single modification of MgO could not completely suppress the formation of ethylbenzene and coke. Doping a small amount of Pd had a positive effect on inhibiting the generation of ethylbenzene and coke, which could be attributed to the hydrogenation of ethylene into ethane on Pd. The dual modified catalyst (MgO and Pd) exhibited high benzene conversion (56%) and xylene selectivity (39.1%), and the lowest ethylbenzene selectivity (0.13%) and coke content (0.4 wt%).

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Section: Catalyst Characterization and Testsmentioning

confidence: 67%

Section: Catalyst Characterization and Testsmentioning

confidence: 67%

Promoting effects of MgO and Pd modification on the catalytic performance of hierarchical porous ZSM-5 for catalyzing benzene alkylation with methanol

Lyu

Cen

et al. 2015

RSC Adv.

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“…As shown in Figure , all catalysts exhibit two NH 3 desorption peaks at 200–220 and 360–390 °C. Typically, the peak at the lower temperature is attributed to the desorption of NH 3 at weak acid sites, while the peak at the higher temperature corresponds to the desorption from strong acid sites. − The adsorption amounts of NH 3 on PdO/ZSM-5 with various Pd-loadings are determined through the deconvolution of the NH 3 -TPD spectra, as presented in Table . After loading of Pd onto ZSM-5, the NH 3 desorption peak from the weak acid sites became less intense.…”

Section: Resultsmentioning

confidence: 99%

Boosting the Production of Glycolic Acid from Formaldehyde Carbonylation via the Bifunctional PdO/ZSM-5 Catalyst

Cao,

Zhang,

Wang

et al. 2023

Ind. Eng. Chem. Res.

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The carbonylation of formaldehyde offers a promising, cost-effective, and environmentally friendly method for synthesizing glycolic acid, a crucial monomer in biodegradable plastics. This study highlights the development and optimization of a bifunctional PdO/ZSM-5 zeolite catalyst for this process. Investigations via various spectroscopic techniques reveal that Pd species, predominantly in the form of PdO, enhance the CO activation, thereby boosting the formaldehyde carbonylation reaction rate significantly. The optimal catalytic performance was observed with a Pd-loading of 2 wt %. Notably, excessive Pd loading was found to impede the catalytic performance by overoccupying acid sites, thereby reducing its capacity to activate formaldehyde. The concurrent activation of formaldehyde and CO at the Brønsted acid site and the PdO site, respectively, through a Langmuir–Hinshelwood mechanism is key to the enhanced catalytic performance. These findings underscore the importance of CO activation in improving the formaldehyde carbonylation process, offering vital insights for catalyst optimization.

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“…A number of multifunctional catalysts that were used in one-step conversion of acetone to MIBK have been studied. These catalysts include Pd-ZSM-5 [4], Pd-Zn-Cr mixed oxides [5] and Pd-LDH [6]. High price and easy loss of palladium are the obvious disadvantages.…”

Section: Introductionmentioning

confidence: 99%

One-Step Synthesis of Methyl Isobutyl Ketone from Acetone Catalysed by Ni-Zirconia

Yang

Zhao³

et al. 2011

AMR

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The one-step synthesis of methyl isobutyl ketone from acetone (MIBK) and H2 in liquid phase was studied over Ni-zirconia catalyst prepared by precipitation. The performances of Ni/ZrO2 catalysts were evaluated by the conversion of acetone and the selectivity of MIBK. The effect of different preparation conditions such as aging temperature, calcination temperature, nickel content and reduction temperature was investigated. The results showed that high acetone conversions of up to 33% and MIBK selectivities of up to 85% were recorded at a nickel content of 13.0 wt % and the reduction temperature of 400°C.

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Effect of acidic and metallic sites on the catalytic performance of Pd/ZSM-5 catalysts in the one-step synthesis of mibk

Cited by 6 publications

References 12 publications

Promoting effects of MgO and Pd modification on the catalytic performance of hierarchical porous ZSM-5 for catalyzing benzene alkylation with methanol

Promoting effects of MgO and Pd modification on the catalytic performance of hierarchical porous ZSM-5 for catalyzing benzene alkylation with methanol

Boosting the Production of Glycolic Acid from Formaldehyde Carbonylation via the Bifunctional PdO/ZSM-5 Catalyst

One-Step Synthesis of Methyl Isobutyl Ketone from Acetone Catalysed by Ni-Zirconia

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