Effective FeMo catalyst for the direct synthesis of …...Effective FeMo catalyst for the direct...

ConfidentialA European Project supported within the Seventh Framework Programme for Research and Technological Development

Effective FeMo catalyst for the direct synthesis of dimethyl-and diethyl acetalsEuroBioRef Summer School

Castro Marina, Lecce, Italy, September 18th – 24th 2011Co-authors: Guillaume Tesquet (UCCS), Louise Jalowiecki-Duhamel (UCCS), Franck Dumeignil (UCCS)Jean-Luc Dubois (ARKEMA), Jean-Luc Couturier (ARKEMA), Mickaël Capron (UCCS) Speaker: Kaew-arpha Thavornprasert (CNRS-UCCS USTL)

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Choice of catalysts FeMo catalyst characterisation

“MoO3-Fe(MoO4)3 (or FeMo)[3,4] ” prepared by co-precipitation of (NH4)6MoO24.4H2O andFeCl3.6H2O, Tcalcination = 723 K, 2 h under air flow[5]

catalytic performance in comparison with- Mo12V3W1.2Cu1.2Sb0.5Ox

[1]

- 7% Re/TiO2

previously exhibiting interesting performances[2]

Fe2(MoO4)3,MoO3, andβ-Fe2(MoO4)3

crystalline phases

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" Drastic change in DMM selectivity under rich MeOH condition for FeMo catalyst giving the best obtainable DMM productivity of 4.6 kg.h-1.kgcat

-1 at 553 K with 56% conversion and very high selectivity of 90% "

Catalytic performance at 553 K

Comparison of catalytic activities in terms of DMM productivity

Catalytic test conditions Catalyst: 150 mg (diluted with 150 mg SiC)Activation: 623 K (1 h) in O2 flow for Mo12V3W1.2Cu1.2Sb0.5Ox

and Re/TiO2, no pretreatment for FeMoFeed compositions: MeOH/O2/He = 7.5/8.5/84 mol% (Poor Feed)

MeOH/O2/He = 40/13/47 mol% (Rich Feed)GHSV: 22 NL.h-1.gcat

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Results

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Gas Phase Dimethoxymethane (DMM) Production from Methanol:

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" Remarkable DEE productivity(1.04 kg.h-1.kgcat

-1) at 526 K with 31% conversion and 47% selectivity

over FeMo catalyst "MoO3-Fe2(MoO4)3

Catalytic performances evaluated at different Treaction

Gas Phase Diethoxyethane (DEE) Production from Ethanol:

Catalytic test conditions Catalyst: 150 mg (diluted with 600 mg SiC)Activation: 10 K.min-1 → 613 K (15 h) in O2/He flow (20/80),

Ftotal = 60 mL.min-1

Feed composition: EtOH/O2/He = 30.8/7/62.2 vol%GHSV: 26 NL.h-1.gcat

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Results

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Acknowledgement

The research led in this project has received funding from the European Union Seventh Framework Programme [FP7/2007 2013]

under grant agreement n°241718.

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