Maleic anhydride yield during cyclic n-butane/oxygen operation

Shekari, Ali; Patience, Gregory S.

doi:10.1016/j.cattod.2010.03.011

Cited by 9 publications

(13 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the second and third scenarios, the feeding points were equally spaced and uniformly distributed along the reactor wall so that the total amount of oxygen fed to these reactor configurations is the same as for the PBR. It is worth noting that previous work reported that a reductive atmosphere at the entrance of the bed leads to a decrease in the reactor performance. Therefore, part of the oxygen was co‐fed with butane to ensure oxidising conditions at the inlet of the catalyst bed.…”

Section: Resultsmentioning

confidence: 99%

Maleic anhydride production in a cross‐flow reactor: A comparative study

Ali

Alhumaizi

2014

Can J Chem Eng

View full text Add to dashboard Cite

The utilisation of cross‐flow reactor (CFR) in maleic anhydride (MA) production by direct oxidation of n‐butane is analysed. The CFR is described by a series of experimentally proven packed‐bed reactor (PBR) segments with specific oxygen dosing for each segment. The MA is up to 35 higher in a CFR compared to a comparative PBR. However, increasing the number of oxygen feeding points, from 4 to 10, resulted in only a slight increase in yield. Moreover, the increase in reactor cooling bath temperature was found to raise the temperature inside the conventional reactor considerably; meanwhile, temperature increase in the corresponding CFR is limited. The use of different oxygen feeding policies; namely equal, increasing and decreasing policies, caused only a minor effect on CFR performance. The advantage in MA yield through use of CFR is diminished as the residence time increases. Since CFR can be safely operated with higher butane inlet concentrations and higher reactor temperature, it represents an interesting alternative for use at industrial‐scale operation.

show abstract

Section: Resultsmentioning

confidence: 99%

Maleic anhydride production in a cross‐flow reactor: A comparative study

Ali

Alhumaizi

2014

Can J Chem Eng

View full text Add to dashboard Cite

show abstract

“…In the fluidized‐bed reactor, the oxygen to n ‐butane ratio is approximately 5:1. In forced concentration cycling (DuPont's CFB process), the optimum ratio is about one . Selectivity to MA decreases with higher oxygen concentration.…”

Section: Resultsmentioning

confidence: 99%

“…AA forms in the presence of O 2 and at high temperature (Figure b). VPP produces MA from many substrates …”

Section: Resultsmentioning

confidence: 99%

“…Vanadium pyrophosphate (VPP) converts n ‐butane into maleic anhydride at 675 K . Mixtures of V 2 O 5 –MgO oxidatively dehydrogenate croton aldehyde to produce MA .…”

Section: Introductionmentioning

confidence: 99%

“…on alumina or silica are the most selective oxidative catalysts for AA. [19] Vanadium pyrophosphate( VPP) converts n-butanei nto maleic anhydridea t675 K. [22][23][24] Mixtures of V 2 O 5 -MgO oxidatively dehydrogenatec roton aldehyde to produceM A. [25] Benzene wast he main feedstockf or MA before 1980.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Gas‐Phase Partial Oxidation of Lignin to Carboxylic Acids over Vanadium Pyrophosphate and Aluminum–Vanadium–Molybdenum

2015

Self Cite

View full text Add to dashboard Cite

Lignin is a complex polymer that is a potential feedstock for aromatic compounds and carboxylic acids by cleaving the β-O-4 and 5-5' linkages. In this work, a syringe pump atomizes an alkaline solution of lignin into a catalytic fluidized bed operating above 600 K. The vanadium heterogeneous catalysts convert all the lignin into carboxylic acids (up to 25 % selectivity), coke, carbon oxides, and hydrogen. Aluminum-vanadium-molybdenum mostly produced lactic acid (together with formic acid, acrylic acid, and maleic anhydride), whereas the vanadium pyrophosphate catalyst produced more maleic anhydride.

show abstract

Transient kinetics of n‐butane partial oxidation at elevated pressure

Shekari¹,

Patience²

2012

Can J Chem Eng

Self Cite

View full text Add to dashboard Cite

A transient Mars-van Krevelen type kinetic model was developed for n-butane partial oxidation over vanadyl pyrophosphate (VPP) catalyst. The model validity was verified over a relatively wide range of redox feed compositions as well as higher reactor pressure (410 kPa). Oxygen and n-butane conversion increased with higher pressure while maleic anhydride (MA) selectivity decreased by as much as 20%. However, the overall MA yield was enhanced by up to 30%. High pressure maintains the catalyst in a higher oxidation state (as long as there is sufficient oxygen in the gas phase) and as a consequence, the catalytic activity is improved together with MA yield. High pressure also affects the redox reaction rates and activation energies.

show abstract

Maleic anhydride yield during cyclic n-butane/oxygen operation

Cited by 9 publications

References 17 publications

Maleic anhydride production in a cross‐flow reactor: A comparative study

Maleic anhydride production in a cross‐flow reactor: A comparative study

Gas‐Phase Partial Oxidation of Lignin to Carboxylic Acids over Vanadium Pyrophosphate and Aluminum–Vanadium–Molybdenum

Transient kinetics of n‐butane partial oxidation at elevated pressure

Contact Info

Product

Resources

About