Cover Image

Formaldehyde Synthesis by Methanol Oxidation Using Platinised Oxides Catalysts

The main purpose of this study is to investigate the performance of platinised silicon dioxide and titanium (IV) oxide catalysts for oxidation of methanol to formaldehyde at room temperature (25 °C). The reaction was carried out using 100 mL of methanol (2.53 mol) in the presence of powdered (150...

Full description

Saved in:
Bibliographic Details
Main Author: Hamdi, Mohd. Rinald
Format: Final Year Project
Language:English
Published: Universiti Teknologi Petronas 2005
Subjects:
TP Chemical technology
Online Access:http://utpedia.utp.edu.my/7651/1/2005%20-%20Formaldehyde%20Synthesis%20By%20Methanol%20Oxidation%20Using%20Platinised%20Oxides%20Catalysts.pdf
http://utpedia.utp.edu.my/7651/
Tags: Add Tag
No Tags, Be the first to tag this record!
id my-utp-utpedia.7651
record_format eprints
spelling my-utp-utpedia.76512017-01-25T09:46:33Z http://utpedia.utp.edu.my/7651/ Formaldehyde Synthesis by Methanol Oxidation Using Platinised Oxides Catalysts Hamdi, Mohd. Rinald TP Chemical technology The main purpose of this study is to investigate the performance of platinised silicon dioxide and titanium (IV) oxide catalysts for oxidation of methanol to formaldehyde at room temperature (25 °C). The reaction was carried out using 100 mL of methanol (2.53 mol) in the presence of powdered (150 mg) catalyst. Samples were drawn at time intervals of 0, 10 20, 60, 90 and 120 minutes and the reaction was conducted up to 120 hours. Formaldehyde concentrations were determined by reacting 5 ml sample solution with the Hantzsch reagent. The complex formed in the samples were analysed using a UV Spectrophotometer. The amountof formaldehyde formed depends on the type of catalyst used. When 0.1 % Pt on silicon dioxide catalyst used, 0.012 mmol of formaldehyde was formed from 2.53 mol methanol after 60 minutes of reaction. Whereas using the 0.3 % Pt on silicon dioxide catalyst, 0.016 mmol of formaldehyde was formed. In the presence of 0.1 %, 0.3 %, 0.5 % and 1.1 % Pt on titanium (IV) oxide catalysts, 0.020, 0.032, 0.044 and 0.020 mmol of formaldehyde was formed, respectively. The percentage conversions of methanol using 0.1 %, 0.3 %, 0.5 % and 1.1 % Pt on titanium (IV) oxide catalysts are 0.0008, 0.0013, 0.0017 and 0.0008 %, respectively. The activity of the catalyst can be ranked in order of 0.5 % Pt on titanium (IV) oxide followed by 0.3 % Pt on titanium (IV) oxide, 0.1 % Pt on titanium (IV) oxide, 0.5 % Pt on silicon dioxide and 0.5 % Pt on silicon dioxide. The titanium (IV) oxide provides better support for platinum to create active sites for reactions. The best platinum loading is approximately 0.5 %. The formaldehyde yields were found to be decreased when elevating the reaction temperatures from 30 °C to 40 °C. The activation energy is 34 kJ/mol and the corresponding frequency factor is 0.26 (mol/L)"075s"1 for this reaction temperature range. From the economic potential of view, the costs ofproduced catalysts are lower than silver catalyst. Universiti Teknologi Petronas 2005-07 Final Year Project NonPeerReviewed application/pdf en http://utpedia.utp.edu.my/7651/1/2005%20-%20Formaldehyde%20Synthesis%20By%20Methanol%20Oxidation%20Using%20Platinised%20Oxides%20Catalysts.pdf Hamdi, Mohd. Rinald (2005) Formaldehyde Synthesis by Methanol Oxidation Using Platinised Oxides Catalysts. Universiti Teknologi Petronas. (Unpublished)
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Electronic and Digitized Intellectual Asset
url_provider http://utpedia.utp.edu.my/
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
Hamdi, Mohd. Rinald
Formaldehyde Synthesis by Methanol Oxidation Using Platinised Oxides Catalysts
description The main purpose of this study is to investigate the performance of platinised silicon dioxide and titanium (IV) oxide catalysts for oxidation of methanol to formaldehyde at room temperature (25 °C). The reaction was carried out using 100 mL of methanol (2.53 mol) in the presence of powdered (150 mg) catalyst. Samples were drawn at time intervals of 0, 10 20, 60, 90 and 120 minutes and the reaction was conducted up to 120 hours. Formaldehyde concentrations were determined by reacting 5 ml sample solution with the Hantzsch reagent. The complex formed in the samples were analysed using a UV Spectrophotometer. The amountof formaldehyde formed depends on the type of catalyst used. When 0.1 % Pt on silicon dioxide catalyst used, 0.012 mmol of formaldehyde was formed from 2.53 mol methanol after 60 minutes of reaction. Whereas using the 0.3 % Pt on silicon dioxide catalyst, 0.016 mmol of formaldehyde was formed. In the presence of 0.1 %, 0.3 %, 0.5 % and 1.1 % Pt on titanium (IV) oxide catalysts, 0.020, 0.032, 0.044 and 0.020 mmol of formaldehyde was formed, respectively. The percentage conversions of methanol using 0.1 %, 0.3 %, 0.5 % and 1.1 % Pt on titanium (IV) oxide catalysts are 0.0008, 0.0013, 0.0017 and 0.0008 %, respectively. The activity of the catalyst can be ranked in order of 0.5 % Pt on titanium (IV) oxide followed by 0.3 % Pt on titanium (IV) oxide, 0.1 % Pt on titanium (IV) oxide, 0.5 % Pt on silicon dioxide and 0.5 % Pt on silicon dioxide. The titanium (IV) oxide provides better support for platinum to create active sites for reactions. The best platinum loading is approximately 0.5 %. The formaldehyde yields were found to be decreased when elevating the reaction temperatures from 30 °C to 40 °C. The activation energy is 34 kJ/mol and the corresponding frequency factor is 0.26 (mol/L)"075s"1 for this reaction temperature range. From the economic potential of view, the costs ofproduced catalysts are lower than silver catalyst.
format Final Year Project
author Hamdi, Mohd. Rinald
author_facet Hamdi, Mohd. Rinald
author_sort Hamdi, Mohd. Rinald
title Formaldehyde Synthesis by Methanol Oxidation Using Platinised Oxides Catalysts
title_short Formaldehyde Synthesis by Methanol Oxidation Using Platinised Oxides Catalysts
title_full Formaldehyde Synthesis by Methanol Oxidation Using Platinised Oxides Catalysts
title_fullStr Formaldehyde Synthesis by Methanol Oxidation Using Platinised Oxides Catalysts
title_full_unstemmed Formaldehyde Synthesis by Methanol Oxidation Using Platinised Oxides Catalysts
title_sort formaldehyde synthesis by methanol oxidation using platinised oxides catalysts
publisher Universiti Teknologi Petronas
publishDate 2005
url http://utpedia.utp.edu.my/7651/1/2005%20-%20Formaldehyde%20Synthesis%20By%20Methanol%20Oxidation%20Using%20Platinised%20Oxides%20Catalysts.pdf
http://utpedia.utp.edu.my/7651/
_version_ 1739831491643310080
score 13.211869

Similar Items