КАТАЛІЗАТОРИ КИСЛОТНО-ОСНОВНИХ ПРОЦЕСІВ НА ОСНОВІ МОДИФІКОВАНОГО ВУГЛЕЦЕВОГО ВОЛОКНА
The functionalization of the carbon fiber based on polyacrylonitrile with sulfur-containing groups of high acidity was carried out in order to obtain the acid-base processes catalysts. Fibers were treated with sulfur vapors in the temperature range of 400-800°C, followed by surface oxidation with 30...
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| Дата: | 2019 |
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| Автори: | , , , , , , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
V.I.Vernadsky Institute of General and Inorganic Chemistry
2019
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| Онлайн доступ: | https://ucj.org.ua/index.php/journal/article/view/64 |
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| Назва журналу: | Ukrainian Chemistry Journal |
Репозитарії
Ukrainian Chemistry Journal| id |
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Ukrainian Chemistry Journal |
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2019-08-30T09:18:09Z |
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OJS |
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English |
| topic |
вуглецеві волокна модифікування поверхні сульфогрупи дегідратація ізопропілового спирту |
| spellingShingle |
вуглецеві волокна модифікування поверхні сульфогрупи дегідратація ізопропілового спирту Grishchenko, Liudmyla Bezugla, Tetiana Zaderko, Alexander Vakaliuk, Anna Mischanchuk , Oleksandr Novychenko, Natalia Cheremenko , Anastasiia Diyuk, Vitaliy КАТАЛІЗАТОРИ КИСЛОТНО-ОСНОВНИХ ПРОЦЕСІВ НА ОСНОВІ МОДИФІКОВАНОГО ВУГЛЕЦЕВОГО ВОЛОКНА |
| topic_facet |
carbon fibre surface modification sulfogroups dehydratation of isopropanol. углеродные волокна модифицирование поверхности сульфогруппы дегидратация изопропилового спирта. вуглецеві волокна модифікування поверхні сульфогрупи дегідратація ізопропілового спирту |
| format |
Article |
| author |
Grishchenko, Liudmyla Bezugla, Tetiana Zaderko, Alexander Vakaliuk, Anna Mischanchuk , Oleksandr Novychenko, Natalia Cheremenko , Anastasiia Diyuk, Vitaliy |
| author_facet |
Grishchenko, Liudmyla Bezugla, Tetiana Zaderko, Alexander Vakaliuk, Anna Mischanchuk , Oleksandr Novychenko, Natalia Cheremenko , Anastasiia Diyuk, Vitaliy |
| author_sort |
Grishchenko, Liudmyla |
| title |
КАТАЛІЗАТОРИ КИСЛОТНО-ОСНОВНИХ ПРОЦЕСІВ НА ОСНОВІ МОДИФІКОВАНОГО ВУГЛЕЦЕВОГО ВОЛОКНА |
| title_short |
КАТАЛІЗАТОРИ КИСЛОТНО-ОСНОВНИХ ПРОЦЕСІВ НА ОСНОВІ МОДИФІКОВАНОГО ВУГЛЕЦЕВОГО ВОЛОКНА |
| title_full |
КАТАЛІЗАТОРИ КИСЛОТНО-ОСНОВНИХ ПРОЦЕСІВ НА ОСНОВІ МОДИФІКОВАНОГО ВУГЛЕЦЕВОГО ВОЛОКНА |
| title_fullStr |
КАТАЛІЗАТОРИ КИСЛОТНО-ОСНОВНИХ ПРОЦЕСІВ НА ОСНОВІ МОДИФІКОВАНОГО ВУГЛЕЦЕВОГО ВОЛОКНА |
| title_full_unstemmed |
КАТАЛІЗАТОРИ КИСЛОТНО-ОСНОВНИХ ПРОЦЕСІВ НА ОСНОВІ МОДИФІКОВАНОГО ВУГЛЕЦЕВОГО ВОЛОКНА |
| title_sort |
каталізатори кислотно-основних процесів на основі модифікованого вуглецевого волокна |
| title_alt |
CATALYSTS OF ACID-BASE PROCESS ON THE BASIS OF THE MODIFIED CARBON FIBER КАТАЛИЗАТОРЫ КИСЛОТНО-ОСНОВНЫХ ПРОЦЕССОВ НА ОСНОВЕ МОДИФИЦИРОВАННОГО УГДЕРОДНОГО ВОЛОКНА |
| description |
The functionalization of the carbon fiber based on polyacrylonitrile with sulfur-containing groups of high acidity was carried out in order to obtain the acid-base processes catalysts. Fibers were treated with sulfur vapors in the temperature range of 400-800°C, followed by surface oxidation with 30% hydrogen peroxide solution. Modified samples were investigated by chemical analysis, thermo-programmed desorption with mass spectrometric registration of products, IR spectroscopy and thermogravimetry. It is shown that the obtained materials contain SO3H-functional groups and oxygen-containing groups (carboxyl, lactone, phenolic, etc.) formed in the surface layer during the oxidation of the fiber surface. The chemical analysis showed that the concentration of sulfur in the samples of the modified fiber is 1.6-6.5 mmol/g. The synthesized samples have a satisfactory thermal stability.
The synthesized catalysts were investigated in the model reaction - gas phase dehydration of isopropyl alcohol. It was found that obtained SO3H-containing carbon fibers were catalytically active and had high propylene selectivity. For all the samples obtained there is a complete conversion of alcohol into propylene. The activity of modified carbon fiber samples in the reaction indicated is a fairly high, temperatures of the total conversion of alcohol into propylene are in the range of 160-190°C. During the study of synthesized catalysts in several cycles of catalysis it have been shown that within repeated use (3 cycles) of all modified fiber samples, the yield of propylene does not decrease, the activity remains stable - the temperature of the dehydration reaction remains unchanged or increases insignificantly (by 5-10ºС). The temperatures of complete conversion of isopropyl alcohol in propylene for synthesized catalysts are lower than the temperatures of destruction maxima of surface sulfogroups. Thus, modified carbon fibers can be used as low-temperature catalysts of acid-base processes, in particular dehydration of alcohols. |
| publisher |
V.I.Vernadsky Institute of General and Inorganic Chemistry |
| publishDate |
2019 |
| url |
https://ucj.org.ua/index.php/journal/article/view/64 |
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oai:ojs2.1444248.nisspano.web.hosting-test.net:article-642019-08-30T09:18:09Z CATALYSTS OF ACID-BASE PROCESS ON THE BASIS OF THE MODIFIED CARBON FIBER КАТАЛИЗАТОРЫ КИСЛОТНО-ОСНОВНЫХ ПРОЦЕССОВ НА ОСНОВЕ МОДИФИЦИРОВАННОГО УГДЕРОДНОГО ВОЛОКНА КАТАЛІЗАТОРИ КИСЛОТНО-ОСНОВНИХ ПРОЦЕСІВ НА ОСНОВІ МОДИФІКОВАНОГО ВУГЛЕЦЕВОГО ВОЛОКНА Grishchenko, Liudmyla Bezugla, Tetiana Zaderko, Alexander Vakaliuk, Anna Mischanchuk , Oleksandr Novychenko, Natalia Cheremenko , Anastasiia Diyuk, Vitaliy carbon fibre, surface modification, sulfogroups, dehydratation of isopropanol. углеродные волокна, модифицирование поверхности, сульфогруппы, дегидратация изопропилового спирта. вуглецеві волокна, модифікування поверхні, сульфогрупи, дегідратація ізопропілового спирту The functionalization of the carbon fiber based on polyacrylonitrile with sulfur-containing groups of high acidity was carried out in order to obtain the acid-base processes catalysts. Fibers were treated with sulfur vapors in the temperature range of 400-800°C, followed by surface oxidation with 30% hydrogen peroxide solution. Modified samples were investigated by chemical analysis, thermo-programmed desorption with mass spectrometric registration of products, IR spectroscopy and thermogravimetry. It is shown that the obtained materials contain SO3H-functional groups and oxygen-containing groups (carboxyl, lactone, phenolic, etc.) formed in the surface layer during the oxidation of the fiber surface. The chemical analysis showed that the concentration of sulfur in the samples of the modified fiber is 1.6-6.5 mmol/g. The synthesized samples have a satisfactory thermal stability. The synthesized catalysts were investigated in the model reaction - gas phase dehydration of isopropyl alcohol. It was found that obtained SO3H-containing carbon fibers were catalytically active and had high propylene selectivity. For all the samples obtained there is a complete conversion of alcohol into propylene. The activity of modified carbon fiber samples in the reaction indicated is a fairly high, temperatures of the total conversion of alcohol into propylene are in the range of 160-190°C. During the study of synthesized catalysts in several cycles of catalysis it have been shown that within repeated use (3 cycles) of all modified fiber samples, the yield of propylene does not decrease, the activity remains stable - the temperature of the dehydration reaction remains unchanged or increases insignificantly (by 5-10ºС). The temperatures of complete conversion of isopropyl alcohol in propylene for synthesized catalysts are lower than the temperatures of destruction maxima of surface sulfogroups. Thus, modified carbon fibers can be used as low-temperature catalysts of acid-base processes, in particular dehydration of alcohols. The functionalization of the carbon fiber based on polyacrylonitrile with sulfur-containing groups of high acidity was carried out in order to obtain the acid-base processes catalysts. Fibers were treated with sulfur vapors in the temperature range of 400-800°C, followed by surface oxidation with 30% hydrogen peroxide solution. Modified samples were investigated by chemical analysis, thermo-programmed desorption with mass spectrometric registration of products, IR spectroscopy and thermogravimetry. It is shown that the obtained materials contain SO3H-functional groups and oxygen-containing groups (carboxyl, lactone, phenolic, etc.) formed in the surface layer during the oxidation of the fiber surface. The chemical analysis showed that the concentration of sulfur in the samples of the modified fiber is 1.6-6.5 mmol/g. The synthesized samples have a satisfactory thermal stability. The synthesized catalysts were investigated in the model reaction - gas phase dehydration of isopropyl alcohol. It was found that obtained SO3H-containing carbon fibers were catalytically active and had high propylene selectivity. For all the samples obtained there is a complete conversion of alcohol into propylene. The activity of modified carbon fiber samples in the reaction indicated is a fairly high, temperatures of the total conversion of alcohol into propylene are in the range of 160-190°C. During the study of synthesized catalysts in several cycles of catalysis it have been shown that within repeated use (3 cycles) of all modified fiber samples, the yield of propylene does not decrease, the activity remains stable - the temperature of the dehydration reaction remains unchanged or increases insignificantly (by 5-10ºС). The temperatures of complete conversion of isopropyl alcohol in propylene for synthesized catalysts are lower than the temperatures of destruction maxima of surface sulfogroups. Thus, modified carbon fibers can be used as low-temperature catalysts of acid-base processes, in particular dehydration of alcohols. The functionalization of the carbon fiber based on polyacrylonitrile with sulfur-containing groups of high acidity was carried out in order to obtain the acid-base processes catalysts. Fibers were treated with sulfur vapors in the temperature range of 400-800°C, followed by surface oxidation with 30% hydrogen peroxide solution. Modified samples were investigated by chemical analysis, thermo-programmed desorption with mass spectrometric registration of products, IR spectroscopy and thermogravimetry. It is shown that the obtained materials contain SO3H-functional groups and oxygen-containing groups (carboxyl, lactone, phenolic, etc.) formed in the surface layer during the oxidation of the fiber surface. The chemical analysis showed that the concentration of sulfur in the samples of the modified fiber is 1.6-6.5 mmol/g. The synthesized samples have a satisfactory thermal stability. The synthesized catalysts were investigated in the model reaction - gas phase dehydration of isopropyl alcohol. It was found that obtained SO3H-containing carbon fibers were catalytically active and had high propylene selectivity. For all the samples obtained there is a complete conversion of alcohol into propylene. The activity of modified carbon fiber samples in the reaction indicated is a fairly high, temperatures of the total conversion of alcohol into propylene are in the range of 160-190°C. During the study of synthesized catalysts in several cycles of catalysis it have been shown that within repeated use (3 cycles) of all modified fiber samples, the yield of propylene does not decrease, the activity remains stable - the temperature of the dehydration reaction remains unchanged or increases insignificantly (by 5-10ºС). The temperatures of complete conversion of isopropyl alcohol in propylene for synthesized catalysts are lower than the temperatures of destruction maxima of surface sulfogroups. Thus, modified carbon fibers can be used as low-temperature catalysts of acid-base processes, in particular dehydration of alcohols. V.I.Vernadsky Institute of General and Inorganic Chemistry 2019-08-15 Article Article Physical chemistry Физическая xимия Фізична xімія application/pdf https://ucj.org.ua/index.php/journal/article/view/64 10.33609/0041-6045.85.7.2019.38-48 Ukrainian Chemistry Journal; Vol. 85 No. 7 (2019): Ukrainian Chemistry Journal; 38-48 Украинский химический журнал; Том 85 № 7 (2019): Украинский химический журнал; 38-48 Український хімічний журнал; Том 85 № 7 (2019): Український хімічний журнал; 38-48 2708-129X 2708-1281 en https://ucj.org.ua/index.php/journal/article/view/64/40 |