The purpose of this work was to investigate biomass-derived ethanol dehydrogenation into acetaldehyde using several mono-and multicomponent (CuO, ZnO and Cr 2 O 3 )-containing catalysts supported on industrial size Al 2 O 3 beads. The catalysts, prepared with either solution combustion or incipient wetness method, were characterized by using various physico-chemical methods, such as EDXA, SEM-EDXA, TEM, XRD, XPS, pyridine adsorption desorption FTIR, and z-potential measurements. The results revealed that the multicomponent catalysts exhibited superior activity compared to the metal oxide catalysts containing only one metal oxide. In addition, the most selective catalyst towards acetaldehyde formation, with 50% selectivity at 55% conversion of ethanol at 300 C and WHSV 1 h À1 was CuOeCr 2 O 3 /Al 2 O 3 prepared by using the solution combustion method, indicating that this inexpensive and rapid catalyst preparation method is promising for other applications.
Abstract-The zeolites and oxide catalysts are investigated in the conversion of bio-ethanol. It is shown that the formation of the products depends on the feedstock composition and the composition of the reaction mixture. It is determined that at the conversion of bio-ethanol over the zeolites 3A, 4A, 5A, and 13 X products of cracking, reforming, dehydration and oligomerization of ethylene are formed. The cerium-containing catalysts are studied via electron microscopy and temperatureprogrammed desorption of ammonia. Doping Ce/γ-Al 2 O 3 catalyst with lanthanum is shown to increase its dispersion and the number of active acid sites, thereby improving its activity.
The preparation of a CeO 2 /CaA catalyst by the solution combustion method leads to enhanced catalyst activity in the conversion of ethanol to ethylene with increased ethylene content in the reaction products from 67 to 89 vol.%. The increase in catalyst activity may be related to an increase in the number of active sites on the catalyst surface, which is attributed to a decrease in the strength of the interaction of the active component and the support in accord with the TPR-H 2 data.
Abstract-Ceria is the active catalyst for various chemical processes. The reactions of hydrogenation of carbon monoxide and dehydration of bioethanol using the cerium oxide as catalyst are considered. The role of cerium oxide in the investigated processes, which have a positive influence on the selectivity, the process conditions, the dispersion of catalysts are shown. Cerium oxide improves the dispersion of active component and has the own catalytic activity.Index Terms-Ceria, catalyst, dehydration of ethanol, conversion of bio-ethanol.
The aim of SEEP2017 is to bring together the researches within the field of sustainable energy and environmental protection from all over the world.The contributed papers are grouped in 18 sessions in order to provide access to readers out of 300 contributions prepared by authors from 52 countries.We thank the distinguished plenary and keynote speakers and chairs who have kindly consented to participate at this conference. We are also grateful to all the authors for their papers and to all committee members.We believe that scientific results and professional debates shall not only be an incentive for development, but also for making new friendships and possible future scientific development projects. Increasing efforts and resources have been devoted to research during environmental studies, including the assessment of various harmful impacts from industrial, civic, business, transportation and other economy activities. Environmental impacts are usually quantified through Life Cycle Assessment (LCA). In recent years, footprints have emerged as efficient and useful indicators to use within LCA. The footprint assessment techniques has provided a set of tools enabling the evaluation of Greenhouse Gas (GHG) -including CO2, emissions and the corresponding effective flows on the world scale. From all such indicators, the energy footprint represents the area of forest that would be required to absorb the GHG emissions resulting from the energy consumption required for a certain activity, excluding the proportion absorbed by the oceans, and the area occupied by hydroelectric dams and reservoirs for hydropower.An overview of the virtual GHG flow trends in the international trade, associating the GHG and water footprints with the consumption of goods and services is performed. Several important indications have been obtained: (a) There are significant GHG gaps between producer's and consumer's emissions -US and EU have high absolute net imports GHG budget. (b) China is an exporting country and increasingly carries a load of GHG emission and virtual water export associated with consumption in the relevant importing countries. (c) International trade can reduce global environmental pressure by redirecting import to products produced with lower intensity of GHG emissions and lower water footprints, or producing them domestically.To develop self-sufficient regions based on more efficient processes by combining neighbouring countries can be a promising development. A future direction should be focused on two main areas: (1) To provide the self-sufficient regions based on more efficient processes by combining production of surrounding countries. (2) To develop the shared mechanism and market share of virtual carbon between trading partners regionally and internationally. HAKAN SERHAD SOYHAN 4 Development in energy sector, technological advancements, production and consumption amounts in the countries and environmental awareness give shape to industry of energy. When the dependency is taken into account in terms of natural...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.