Modeling the selective oxidation of n-butane to maleic anhydride: From active site to industrial reactor

Müller, Mauritio; Kutscherauer, Martin; Böcklein, Sebastian; Wehinger, Gregor D.; Turek, Thomas; Mestl, Gerhard

doi:10.1016/j.cattod.2021.04.009

Cited by 31 publications

(40 citation statements)

References 204 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has been reported that the phosphorus loss would decrease the selectivity of the MA product. The catalyst must compensate for the loss of phosphorus to maintain stable operation at a certain time. ,− …”

Section: Resultsmentioning

confidence: 99%

“…Vanadyl pyrophosphate (VPO) catalysts have been proved to be effective for selectively oxidizing n -butane into maleic anhydride (MA). − The correlation of catalytic behaviors for n -butane oxidation with crystalline phases in VPO catalysts has been reviewed widely. − The crystalline phases can easily transform into other forms during calcination and activation. Therefore, it is really difficult to correlate the activity and selectivity with the crystalline phases.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Reaction Behaviors and Crystal Transformation of Industrial Vanadium–Phosphorus–Oxygen (VPO) Catalysts for n-Butane Oxidation

et al. 2021

View full text Add to dashboard Cite

A long-time evaluation of n -butane oxidation over an industrial vanadium–phosphorus–oxygen (VPO) catalyst was implemented. The catalytic performances for n -butane oxidation during this period were obtained. It was shown that the conversion of n -butane increased with the evaluation time, but the selectivity of the maleic anhydride (MA) product decreased gradually. To investigate the crystal transformation of the VPO catalyst, the properties of fresh and evaluated VPO catalysts were measured by a series of characterization methods, including X-ray diffraction (XRD), N 2 adsorption and desorption, NH 3 -temperature programmed desorption (TPD), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). The results showed that the acidities and valence of vanadium increased after evaluation due to the appearance of a β-VOPO 4 phase. The crystal transformation would increase the activity for n -butane oxidation. Meanwhile, during the evaluation period, the decrease in selectivity of the MA product should be related to the decreasing percentage of Lat-O species in the VPO catalyst.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reaction Behaviors and Crystal Transformation of Industrial Vanadium–Phosphorus–Oxygen (VPO) Catalysts for n-Butane Oxidation

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The sorption behavior of the ZIF-8 slurry strongly depends on the solvent chosen for preparation. The criteria for choosing a suitable solvent are: (1) its molecules could not enter the pores of ZIF-8, otherwise adsorption capacity of ZIF-8 will be lost; (2) The solubility of iso-butane in it should be as low as possible, otherwise the apparent selectivity of the ZIF-8 slurry will be lowered significantly compared with the solid ZIF-8, hence it should be hydrophilic; (3) it should be highly chemical stable when mixed with ZIF-8, low viscosity and volatility; (4) it could accelerate the adsorption of n-butane in suspended ZIF-8; (5) serious foaming does not occur during the desorption process. Through a great of sieving and testing work based on the above criteria, it is found that solvent M almost meets all the requirements aforementioned: much higher sorption speed of the ZIF-8/M slurry than that of the solid ZIF-8 as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The reasons are as follows: (1) membrane production is cumbersome and expensive 15 and the membrane structure is prone to cracking 10 . (2) The linear/branched isomer separation selectivity is low and the uptake capacity of adsorbents is low 16 . (3) The continuous multi-stage separation in membrane-based technology is difficult to be realized.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Separation of butane isomers using a novel ZIF-8 slurry with extremely high efficiency: from laboratory study to industrial pilot test

Yang

Wang

Zuo³

et al. 2021

Preprint

View full text Add to dashboard Cite

Both n-butane and iso-butane are important petrochemical raw materials, and their separation is of great significance and full of challenge because of their close boiling characteristic. The ZIF-8 slurry formed with a novel mixed solvent M-water solution as sorption media was adopted to separate the mixture with high efficiency. The iso-/n-butane selectivity of ZIF-8/M-water slurries is as high as 890 with high kinetic performance, even transcending the upper limit of the new materials or membranes. More encouragingly, continuous pilot separation device was established and test results show that the purity and recovery ratio of iso-butane product achieved 99.46 mol% and 87% respectively, which are remarkably superior to the corresponding performance (98.56 mol% and 54%) of the industrial distillation tower. To our best knowledge, this is the first industrial pilot test using MOFs for gas separation, and also an important step forward to the commercial application of MOFs in gas separation.

show abstract

The Catalytic Function of Phosphorus Enriched on the Surface of Vanadium‐based Catalysts in Selective Oxidations

et al. 2023

View full text Add to dashboard Cite

Vanadium phosphates are established as the benchmark system for the selective oxidation of n‐butane towards maleic anhydride. By varying the phosphorus content on the surface of three V‐based catalysts with diverse performance, this study experimentally elaborates on the catalytic function of phosphorus. Contact time variation and cofeed studies revealed, that surface phosphates, deposited in sub‐monolayers via atomic layer deposition, significantly contribute to an increased product selectivity. Furthermore, our results suggest that the phosphorus particularly suppresses the consecutive combustion of the (re‐)adsorbed product. The recently introduced solid solution catalyst V1‐xNbxOPO4 with medium maleic anhydride selectivity could be tuned by the surface enrichment with phosphorus towards product selectivities of up SMAN = 60%, under optimized alkane‐rich feed conditions. Therefore, POx‐V0.3Nb0.7OPO4 is introduced as promising catalyst, which is not based on vanadyl(IV) pyrophosphate, to access significantly higher MAN formation rates at increased alkane partial pressures of cn‐butane > 10%vol in n‐butane oxidation.

show abstract

Modeling the selective oxidation of n-butane to maleic anhydride: From active site to industrial reactor

Cited by 31 publications

References 204 publications

Reaction Behaviors and Crystal Transformation of Industrial Vanadium–Phosphorus–Oxygen (VPO) Catalysts for n-Butane Oxidation

Reaction Behaviors and Crystal Transformation of Industrial Vanadium–Phosphorus–Oxygen (VPO) Catalysts for n-Butane Oxidation

Separation of butane isomers using a novel ZIF-8 slurry with extremely high efficiency: from laboratory study to industrial pilot test

The Catalytic Function of Phosphorus Enriched on the Surface of Vanadium‐based Catalysts in Selective Oxidations

Contact Info

Product

Resources

About