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Formaldehyde production from methanol and methyl mercaptan over titania and vanadia based catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
46994 46455 2011 7 PDF Available
Title
Formaldehyde production from methanol and methyl mercaptan over titania and vanadia based catalysts
Abstract

The results of selective oxidation of CH3OH and CH3SH to produce formaldehyde are presented and the effect of the reaction conditions on the CH2O yield is evaluated. The yield of formaldehyde was evaluated by thermodynamic calculations by using the HSC Chemistry® and Aspen Plus® simulation programmes. Oxidation of CH3OH and CH3SH was investigated by calculating the system equilibrium composition. Based on the modelling results, the yield of formaldehyde was almost zero with all the reactants present, i.e. the CH3OH, CH3SH and CH3OH + CH3SH mixture, which was also supported by the experiments. Catalytic experiments were performed over TiO2, V2O5/SiO2 and V2O5/(SiO2 + 10% TiO2) catalysts to evaluate the effect of feed concentration, reaction temperature and catalyst loading on the formaldehyde yield. Both CH3OH and CH3SH were oxidized separately and as mixtures. The V2O5/(SiO2 + 10% TiO2) catalyst was the most active catalyst in formaldehyde production. At optimal reaction conditions, 88% yield of CH2O was achieved at 413 °C in a feed mixture of 1000 ppm of CH3OH + CH3SH with the space velocity of 94,000 h−1. The catalysts showed no activity loss when tested for 6 h.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights► VOC emissions can be utilized to produce useful chemicals. ► Methanol and methyl mercaptan can be simultaneously converted to formaldehyde. ► Highest conversions and selectivities were gained with V2O5/SiO2 + TiO2 catalyst. ► Temperature over 300 °C is required for high formaldehyde production. ► No signs of catalyst deactivation due to sulphur was observed.

Keywords
Catalytic oxidation; Vanadium pentoxide; Methanol; Methyl mercaptan; Environmental catalysis
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Formaldehyde production from methanol and methyl mercaptan over titania and vanadia based catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 103, Issues 1–2, 14 March 2011, Pages 72–78
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us