Folie 1 Synthesis of metal oxide aerogels from their salts Helmut Schäfer, Kathleen Heinrich, Barbara Milow, Lorenz Ratke Institut für Materialphysik im.

Slides:

Advertisements

Similar presentations

Identifying Types of Chemical Reactions

Advertisements

What is Nanotechnology

Predicting Products of Chemical Reactions

High temperature Oxidation of Si Containing Steel Computational Metallurgy Lab. Graduate Institute of Ferrous Technology Pohang University of Science and.

Production of Nitric Acid

Phenols (Ar-OH).

Facile synthesis and hydrogen storage application of nitrogen-doped carbon nanotubes with bamboo-like structure Reference, Liang Chen et.al, international.

Removal of Cu(II) ions from aqueous solution effluent using Melamine-Formaldehyde-DTPA resin in a fixed-bed up-flow column By Ahmad Baraka Supervisors.

Preparation & Characterization of heterogeneous catalyst

A Non-Aqueous Solution Synthesis of Boron Carbide by Control of In-Situ Carbon J. L. Watts a,b, Ian D. R. Mackinnon a, Peter C.Talbot a,b, and Jose A.

Combustion Reactions.

Chapter 9 Synthesis Methods Hong-Wen Wang. How to prepare ceramic powders ? Sol-Gel Process Aqueous solution (from metal salts or colloidal particles)

Valter Reedo 1,2, Martin Järvekülg 1,2, A. Lukner 1, K. Keevend 1, A. Lõhmus 1, U. Mäeorg 2 1 Institute of Physics, University of Tartu, Riia 142, EE

Advanced Higher Chemistry Unit 1 The oxides, chlorides and hydrides.

Ocellus, Inc. Progress Toward Air-Dried RF Shells John Karnes 1, Jon Streit 1, Don Bittner 1, Nicole Petta 1, Shannan Downey 2, Mike Droege 2 1 Schafer.

Private and Confidential © 2013 Metalysis Ltd. Low Cost Titanium - A Global Opportunity Kartik Rao IOM 3 - London, UK 12 th December 2013.

T’Keyah Driskell & Lyric Williams

13.1. Period 3: Oxides and Chlorides

Chemical Weathering. I. Introduction Chemical Weathering I. Introduction II. Process of Decomposition A. Overview: Decomposition alters minerals into.

Chemical & Process Engineering Novel Material for the Separation of Mixtures of Carbon Dioxide and Nitrogen Mohamed A. M. Elsayed Supervisors : Prof. P.

S.M. Pérez-Moreno, M.J. Gázquez, J.P. Bolívar Group of Radiations Physics and Environment, University of Huelva, Huelva, Spain. World Congress and Expo.

Direct Production of Titanium Powder from Titanium Ore by Preform Reduction Process Haiyan Zheng 1  and Toru H. Okabe 1 1 Institute of Industrial Science,

Applications in Polymer Processing Principle Investigator: Yan - Ping Chen Research Worker: Tsung - Yao Wen Tz - Bang Du Department of Chemical Engineering.

Aldehydes & Ketones: Part II

Catalyst Design and Preparation Dr. King Lun Yeung Department of Chemical Engineering Hong Kong University of Science and Technology CENG 511 Lecture 3.

A. Popa a, V. Sasca a, I. Holclajtner-Antunovic b, O. Verdes a and L. Avram a a Institute of Chemistry Timisoara of Romanian Academy, 24 Mihai Viteazul.

24 th Modern Engineering & Technology Seminar (METS 2012), Taipei, Taiwan, Nov , 2012 CSD – Low Cost, Easy Setup, and Irregular Surface-Coating.

Hydrogen Storage in Nano-Porous Materials The University of Oklahoma School of Chemical, Biological, and Materials Engineering Dimitrios Argyris.

Research performed at UNLV on the chemistry of Technetium in the nuclear fuel cycle 1. Separation U/Tc and synthesis of solids form 2. Synthesis and characterization.

Nitrogen-Doped Carbon

Che5700 陶瓷粉末處理 Powder Synthesis Solid state method:  Solid-solid reaction; decomposition of solid; oxidation or reduction of solid Liquid phase method:

Synthesis 2 or more elements or compounds combine to make one product A + B  AB Element + element yields compound.

Course Outline I.Introduction to Transition Metal Complexes. Classical complexes (Jorgenson and Werner) Survey of ligand coordination numbers, geometries.

4Na + O 2  2Na 2 O How many grams of Sodium Oxide can be produced from 25g of Sodium? 25 g Na 1 mole 23.0g 23.0g =1.08 mole Na 2Na 2 O 2Na 2 O 4 Na.

SYNTHESIZING MULTIFUNCTIONAL NANOCOMPOSITES FOR THE REMOVAL OF VALUABLE AND TOXIC METAL IONS FROM ALONG WITH WATER-BORNE MICROBES FROM CONTAMINATED WATER.

Types of Reactions. A chemical reaction is a process that is usually characterized by a chemical change in which the starting materials (reactants) are.

Question of the Day Day A solution containing 3.50 g sodium phosphate is mixed with a solution containing 6.40 g barium nitrate. After the reaction.

Sol-Gel.  - Why Sol-Gel..? ApplicationsConventional methods Glass preparation and ceramics High temparature, thermal decomposition, limited materials.

Reactions of Metals. Metal Oxides Salts and hydrogen React with oxygen to giveReact with acids to give.

1 Classification and purification of Organic Compounds.

Reaction Types. Combustion Oxygen reacts and produces CO 2 and H 2 O General Reaction: C x H x + O 2  CO 2 + H 2 O.

Glass surface modification by coating deposition

Solution State Synthesis

LOGO Water Gas Shift Reaction Over Au/Ce x Ti y O 2 Cheng Wan.

Abstract Water-stable Hf/Zr-Fumarate (FMA) metal-organic frameworks (MOFs) are highly promising for gas separation because of their postulated small pore.

Properties of elements and compounds Why is it safe to put sodium chloride on fish and chips… …but not safe to use sodium and chlorine?

Green synthesized copper nanoparticles into granular activated carbon of babassu coconut by Hibiscus Sabdariffa flowers for removal of nitrate R. M. Paixão,

Nitrogen-enriched carbon nanofibers containing Cu-loaded porous carbon beads for the abatement of NO emissions Bhaskar Bhaduri1 and Nishith Verma1,2 1.

Plasma synthesis and processing

Atomic Counting Answer the following questions by determining the total number of atoms in each formula. 1. H2SO4 2. 3Fe AgNO3 4. Pb(NO3)2 5. Ba(ClO3)2.

Muhammad Akhsin Muflikhun

STUDIES ON PHOTOCATALYTIC ACTIVITY OF NANOCOMPOSITES OF NITROGEN DOPED GRAPHENE WITH METAL MOLYBDATES (NG-MMoO4) Manesh Kumar and H. N. Sheikh* Department.

Sezgin Cengiz1, Mehmet Yazici1,2, Y. Gencer1,*, M. Tarakci1,

European Metallurgical Conference

Compounds and Mixtures

Metal salt dissolved in solvent

II. Types of Reactions.

Chemical Weathering SAPROLITE.

Elements and Compounds

Unit 3.1: Chemical Reactions

Ho Kyun Jung, U Hyeok Choi * Department of Polymer Engineering, Pukyong National University Corresponding author :

Properties of elements and compounds Why is it safe to put sodium chloride on fish and chips… …but not safe to use sodium and chlorine?

Carboxylic acids AH Chemistry, Unit 3(b).

Suspension Processing of Microporous Metal-Organic Frameworks: A Scalable Route to High-Quality Adsorbents Angelo Kirchon, Gregory S. Day, Yu Fang, Sayan.

Types of Chemical Reactions

Carboxylic acids.

original composite sorbent

Synthesis Reactions!.

Presentation transcript:

Folie 1 Synthesis of metal oxide aerogels from their salts Helmut Schäfer, Kathleen Heinrich, Barbara Milow, Lorenz Ratke Institut für Materialphysik im Weltraum, Linder Höhe, D Köln

Folie 2 Background Synthesis of aerogels from their metal salts for application as additives in foundry industry Desired properties:- high surface area - high temperature stability Simple process route Synthesis on a large scale

Folie 3 Introduction Preparation of aerogels 1. Hydrolysis of metal alkoxides 2. Condensation reaction to hydro- or alcogel 3. Ageing 4. Drying

Folie 4 Introduction Preparation of aerogels 1. Hydrolysis of metal salts 2. Condensation reaction to hydro- or alcogel 3. Ageing strong exothermic reaction!! TiCl 4, SiCl 4, ZrCl 4, ZnCl 2, SnCl 4

Folie 5 Introduction 4. Supercritical Drying with carbon dioxide Before!! Removal of residual salts solvent exchange: water → alcohol or acetone >Sodium silicate + KCr(SO 4 ) 2 >Al(Cl) 3 >Sodium silicate + FeCl 3 >FeCl 3 >Zr-alkoxide

Folie 6 Characterization Adsorption/Desorption measurement with nitrogen TGA-FTIR Scanning electron microscopy

Folie 7 Results – BET Surface BJH-PlotAdsorption/Desorption Desorption Adsorption Zirconium aerogel: BET 498 m 2 /g

Folie 8 Results – BET Surface PrecursorCatalystBET in m 2 /g ZrCl 4 /TiCl 4 propylene oxide577 ZrCl 4 propylene oxide498 SiCl FeCl 3 · H 2 Opropylene oxide363 AlCl 3 propylene oxide389 Sodium silicate + SnCl SbCl 3 propylene oxide8 Wide range of different aerogels with high surface areas!!

Folie 9 The right choice Metal oxideFp in °CSintering temperature (calc.) in °C ZrO Al 2 O TiO SiO Fe 2 O Toxicity -Price per kg -Availability

Folie 10 Results – BET Surface MetaloxideCatalystBET in m 2 /g ZrCl 4 /TiCl 4 propylene oxide577 ZrCl 4 propylene oxide498 SiCl FeCl 3 · H 2 Opropylene oxide363 AlCl 3 propylene oxide389 Sodium silicate + SnCl SbCl 3 propylene oxide8 Sodium silicate + KCr(SO 4 ) 2 *H 2 O -400 Zr-, Ti- and Silica-Aerogels showed best results in preliminary tests for foundry applications!

Folie 11 Results – TGA: Silica-Aerogel

Folie 12 Results – IR (122 °C): (Silica-Aerogel) IR-Library Extracted from 3D-IR-Spectra

Folie 13 Results – SEM Silica-Aerogel (572 m 2 /g)

Folie 14 Results – Large Scale synthesis Zirconium-Aerogels20 cm 3 (typical lab scale) 50 cm 3 (works fine) 500 cm 3 (monolith) Successful preparation of Zirconium aerogel up to 500 cm L Pilot plant scale with industrial partners

Folie 15 Conclusion Aerogels can be easily synthesized from their metal salts A wide range of different aerogels with high surface areas were synthesized Zirconia aerogel up to 500 cm 3 were synthesized Focus on Zr-, Ti- and Silica-aerogels for foundry applications