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Paper Titles
Preface
A Lifecycle Sustainability Assessment of CO2 Emissions, Energy Consumption and Social Aspects of Methylic and Ethylic Biodiesel Using Principal Component Analysis
p.1
CO2 Chemical Conversion Using Catalytics Systems Based on Titanate Nanotubes
p.13
Ionic Liquid [Bmim][NTf2] as Solvent for CO2 Removal in Offshore Processing of Natural Gas
p.21
Technical Evaluation of the Applicability of Gas-Liquid Membrane Contactors for CO2 Removal from CO2 Rich Natural Gas Streams in Offshore Rigs
p.29
Achieving Negative Emissions: Integration of Sugarcane Crop, Ethanol Biorefinery, Post-Combustion Capture and CO2 Pipeline for Enhanced Oil Recovery
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Integration of Post-Combustion Capture and Reinjection Plant to Power Generation Cycle Using CO2-Rich Natural Gas in Offshore Oil and Gas Installation
p.49
CO2 Emission and Energy Assessments of a Novel Pre-Purification Unit for Cryogenic Air Separation Using Supersonic Separator
p.59
Porosity Alteration of Carbonates by CO2-Enriched Brine Injection
p.69

CO2 Chemical Conversion Using Catalytics Systems Based on Titanate Nanotubes

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Abstract:

CO2 is the most important greenhouse gas in terms of emitted quantities and its emission has increased significantly due to the action of anthropogenic sources. Among the alternatives for mitigation of this gas is the direct synthesis of propylene carbonate (PC), which requires efficient and selective catalysts. In this scenario the titanate nanotubes (TNT) are promising catalysts because they can be modified to become selective for the PC synthesis. The present work has the objective to develop titanate nanotubes with different metals (Na, Sn and Zn) as well as protonated titanate nanotubes (HTNT) and to test their efficiency in the direct synthesis of PC. The synthesized nanostructures were characterized by TEM, EDS, XRD and N2 adsorption-desorption. The results showed that the synthesized TNT have a specific surface area of 155, 232, 56 and 140 m2/g (NaTNT, HTNT, SnTNT and ZnTNT, respectively). Besides, the ion exchange of [Na+] by [Sn+2] and [Zn+2] decreased the crystallinity of nanostructure. On the catalytic tests, the system NaTNT/ZnBr2 showed the best results with a yield of 61% and a selectivity of 81% in PC. The catalytic system SnTNT/DMF and ZnTNT/DMF are promising to this reaction showing interesting yields and catalytic activity (59 and 53%; 295 and 265 mmol/g) for PC synthesis.

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Periodical:

Materials Science Forum (Volume 965)

Pages:

13-20

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.965.13

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Online since:

July 2019

Authors:

Wesley Formentin Monteiro, Michele Oliveira Vieira*, Carolina Majolo Scheid, Michèle Oberson de Souza, Sandra Einloft, Rosane Ligabue

Keywords:

CO2 Conversion, Propylene Carbonate, Titanate Nanotubes

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© 2019 Trans Tech Publications Ltd. All Rights Reserved

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