A bicomponent catalyst for the selective formation of ethanol from synthesis gas

Ehwald, H.; Ewald, H.; Gutschick, D.; Hermann, Markus; Mießner, H.; Öhlmann, G.; Schierhorn, E.

doi:10.1016/0166-9834(91)80044-w

Cited by 28 publications

(12 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Figure 8 shows the TPR profiles for the Rh/SiO2 and Rh/MCM-41 catalysts. It can be seen that the reduction of rhodium oxide species begins at low temperatures, in agreement with the literature [24,25]. All Rh species seem to be reduced at temperatures below 200 °C.…”

Section: Transmission Electron Microscopy (Tem)supporting

confidence: 79%

Synthesis of Ethanol from Syngas over Rh/MCM-41 Catalyst: Effect of Water on Product Selectivity

et al. 2015

View full text Add to dashboard Cite

Abstract:The thermochemical processing of biomass is an alternative route for the manufacture of fuel-grade ethanol, in which the catalytic conversion of syngas to ethanol is a key step. The search for novel catalyst formulations, active sites and types of support is of current interest. In this work, the catalytic performance of an Rh/MCM-41 catalyst has been evaluated and compared with a typical Rh/SiO2 catalyst. They have been compared at identical reaction conditions (280 °C and 20 bar), at low syngas conversion (2.8%) and at same metal dispersion (H/Rh = 22%). Under these conditions, the catalysts showed different product selectivities. The differences have been attributed to the concentration of water vapor in the pores of Rh/MCM-41. The concentration of water vapor could promote the water-gas-shift-reaction generating some extra carbon dioxide and hydrogen, which in turn can induce side reactions and change the product selectivity. The extra hydrogen generated could facilitate the hydrogenation of a C2-oxygenated intermediate to ethanol, thus resulting in a higher ethanol selectivity over the Rh/MCM-41 catalyst as compared to the typical Rh/SiO2 catalyst; 24% and 8%, respectively. The catalysts have been characterized, before and after reaction, by N2-physisorption, X-ray photoelectron OPEN ACCESSCatalysts 2015, 5 1738 spectroscopy, X-ray diffraction, H2-chemisorption, transmission electron microscopy and temperature programmed reduction.

show abstract

Section: Transmission Electron Microscopy (Tem)supporting

confidence: 79%

Synthesis of Ethanol from Syngas over Rh/MCM-41 Catalyst: Effect of Water on Product Selectivity

et al. 2015

View full text Add to dashboard Cite

show abstract

“…More recently, RC was shown to operate in the oxidation of butane to MAA (Ruiz et al, 1993), the oxidative dehydrogenation of butene (Qiu et al, 1989a(Qiu et al, , 1989b, and, probably, the oxygen-aided dehydration of alcohols. Serious candidates for effective remote control are methanol synthesis, where the role of spillover hydrogen is investigated (Burch et al, 1990), other reactions with synthesis gas (ethanol formation: Ehwald et al, 1991), and the oxidative coupling of methane (Baidikova et al, 1992), where a synergy between phases has been demonstrated but a remote control has not been definitely proven yet.…”

Section: More Areas Where Chemical Engineering Can Contributementioning

confidence: 99%

Remote Control of Catalytic Sites by Spillover Species: A Chemical Reaction Engineering Approach∗

Delmon¹,

Froment²

1996

Catalysis Reviews

171

View full text Add to dashboard Cite

“…8), who suggested two classes of promoters for Rh/SiO2: those that increase CO conversion based on acceleration of CO dissociation and those that h'nprove selectivity based on the control of electronic state mad ensemble size of Rh particles ( Figure 17). J Considerable effort has been put forth to develop bicomponent catalysts for selective formation of ethanol from syngas (Ewald et al 1991).…”

Section: Supported Platinum Group For Hight' Alcoholsmentioning

confidence: 99%

Status and future opportunities for conversion of synthesis gas to liquid energy fuels: Final report

Mills

1993

View full text Add to dashboard Cite

A bicomponent catalyst for the selective formation of ethanol from synthesis gas

Cited by 28 publications

References 64 publications

Synthesis of Ethanol from Syngas over Rh/MCM-41 Catalyst: Effect of Water on Product Selectivity

Synthesis of Ethanol from Syngas over Rh/MCM-41 Catalyst: Effect of Water on Product Selectivity

Remote Control of Catalytic Sites by Spillover Species: A Chemical Reaction Engineering Approach∗

Status and future opportunities for conversion of synthesis gas to liquid energy fuels: Final report

Contact Info

Product

Resources

About