Change search
ReferencesLink to record
Permanent link

Direct link
Synthesis of Ethanol from Syngas over Rh/MCM-41 Catalyst: Effect of Water on Product Selectivity
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Chemical Technology. UMSA Universidad Mayor de San Andrés, Bolivia.
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Chemical Technology. UMSA Universidad Mayor de San Andrés, Bolivia.ORCID iD: 0000-0002-3793-1197
Show others and affiliations
2015 (English)In: CATALYSTS, ISSN 2073-4344, Vol. 5, no 4, 1737-1755 p.Article in journal (Refereed) PublishedText
Abstract [en]

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 degrees 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 C-2-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 N-2-physisorption, X-ray photoelectron spectroscopy, X-ray diffraction, H-2-chemisorption, transmission electron microscopy and temperature programmed reduction.

Place, publisher, year, edition, pages
MDPI AG , 2015. Vol. 5, no 4, 1737-1755 p.
Keyword [en]
ethanol, syngas, Rh/MCM-41 catalyst, water vapor
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-180993DOI: 10.3390/catal5041737ISI: 000367535300008ScopusID: 2-s2.0-84944885472OAI: oai:DiVA.org:kth-180993DiVA: diva2:898193
Note

QC 20160127

Available from: 2016-01-27 Created: 2016-01-26 Last updated: 2016-01-29Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
López, LuisVelasco, JorgeBoutonnet, MagaliJärås, Sven
By organisation
Chemical Technology
Chemical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 23 hits
ReferencesLink to record
Permanent link

Direct link