scholarly journals THE USE OF RuO DEPOSITED ON HZSM-5 WITH A DIFFERENT SILICATE MODULUS IN THE REACTION OF LEVULINIC ACID HYDROGENATION

2021 ◽  
pp. 21-27
Author(s):  
Диаля Атия Абусуек ◽  
Линда Жановна Никошвили
Keyword(s):  
Aqueous Medium ◽  
Levulinic Acid ◽  
Hydrogen Pressure ◽  
Ruthenium Dioxide ◽  
Mild Conditions ◽  
Partial Hydrogen Pressure

В работе проводилось исследование рутений-содержащих катализаторов на основе цеолитов HZSM-5 с различным кремнеземным модулем (40, 80 и 400) в реакции гидрирования левулиновой кислоты (ЛК) до гамма-валеролактона. Была изучена зависимость активности композитов Ru/HZSM-5 от кремнеземного модуля выбранного цеолита и от содержания диоксида рутения на поверхности. Показано, что образец Ru/HZSM-5 с кремнеземным модулем 40 позволяет в достаточно мягких условиях (температура 100С, парциальное давление водорода 1 МПа) достичь 98% конверсии ЛК за 60 мин реакции в водной среде. In this work, the study of ruthenium-containing catalysts based on zeolites of the HZSM-5 type with different silicate modulus (40, 80 and 400) in the reaction of levulinic acid (LA) hydrogenation to gamma-valerolactone was carried out. The dependence of the activity of Ru/HZSM-5 composites on the silicate modulus of the selected zeolite and on the content of ruthenium dioxide on the surface was studied. It is shown that the Ru/HZSM-5 sample with a silicate modulus equal to 40 allows achieving 98% of LA conversion in 60 minutes of the reaction in an aqueous medium under mild conditions (temperature 100°C, 1 MPa of partial hydrogen pressure).

scholarly journals HYDRATION OF LEVULIC ACID TO GAMMA-VALEROLACTONE USING Ru/HZSM-5

2021 ◽  
pp. 18-22
Author(s):  
Диаля Атия Абусуек ◽  
Линда Жановна Никошвили
Keyword(s):  
Catalytic System ◽  
Levulinic Acid ◽  
Hydrogen Pressure ◽  
Influence Of Temperature ◽  
Mild Conditions ◽  
Partial Hydrogen Pressure ◽  
Temperature And Pressure ◽  
The Stability

В работе проводилось исследование рутений-содержащей каталитической системы на основе цеолита ZSM-5 в реакции гидрирования левулиновой кислоты (ЛК) до гамма-валеролактона (ГВЛ). Было изучено влияние температуры и давления на скорость трансформации ЛК, а также стабильность каталитической системы Ru/HZSM-5. Показано, что применение Ru/HZSM-5 позволяет в достаточно мягких условиях (температура 100С, парциальное давление водорода 1 МПа) достичь 98% конверсии ЛК за 60 мин реакции. In this work, ruthenium-containing catalytic system based on zeolite ZSM-5 was studied in the reaction of levulinic acid (LA) hydrogenation to gamma-valerolactone (GVL). The influence of temperature and pressure on the rate of LA transformation, as well as the stability of Ru/HZSM-5 catalytic system, was studied. It was shown that the use of Ru/HZSM-5 allows achieving 98% of LA conversion in 60 minutes of the reaction under relatively mild conditions (temperature 100°C, partial hydrogen pressure 1 MPa).

Trimetallic Cu–Ni–Zn/H-ZSM-5 Catalyst for the One-Pot Conversion of Levulinic Acid to High-Yield 1,4-Pentanediol under Mild Conditions in an Aqueous Medium

ACS Catalysis ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 2846-2864
Author(s):  
Neha Karanwal ◽  
Malayil Gopalan Sibi ◽  
Muhammad Kashif Khan ◽  
Aye Aye Myint ◽  
Beom Chan Ryu ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Levulinic Acid ◽  
High Yield ◽  
One Pot ◽  
Mild Conditions ◽  
The One

Indium-Mediated Debromination of gem-Bromonitroalkanes under Mild Conditions in Aqueous Medium

Synlett ◽  
2014 ◽  
Vol 25 (11) ◽  
pp. 1561-1564 ◽  
Author(s):  
Raquel Soengas ◽  
Artur Silva ◽  
Rita Acúrcio
Keyword(s):  
Aqueous Medium ◽  
Mild Conditions

Kinetic Studies on the Impact of Pd Addition to Ru/TiO2 Catalyst: Levulinic Acid to γ-Valerolactone under Ambient Hydrogen Pressure

2020 ◽  
Vol 59 (39) ◽  
pp. 17279-17286 ◽  
Author(s):  
Guangyue Xu ◽  
Chuang Li ◽  
Tianyu Deng ◽  
Chenguang Wang ◽  
Ying Zhang ◽  
...  
Keyword(s):  
Levulinic Acid ◽  
Hydrogen Pressure ◽  
Kinetic Studies ◽  
Tio2 Catalyst ◽  
The Impact

Alum (KAl(SO4)2·12H2O)-Catalyzed, Eco-Friendly, and Efficient One-Pot Synthesis of 2-Arylbenzothiazoles and 2-Arylbenzoxazole in Aqueous Medium

2008 ◽  
Vol 61 (11) ◽  
pp. 905 ◽  
Author(s):  
Shivaji S. Pawar ◽  
Deepak V. Dekhane ◽  
Murlidhar S. Shingare ◽  
Shivaji N. Thore
Keyword(s):  
Ambient Temperature ◽  
Aqueous Medium ◽  
Simple Procedure ◽  
Reaction Yield ◽  
One Pot ◽  
Mild Conditions ◽  
One Pot Synthesis ◽  
Novel Catalyst

Alum (KAl(SO4)2·12H2O) performs as a novel catalyst for the synthesis of 2-arylbenzothiazoles and 2-arylbenzoxazole from o-aminothiophenol and o-aminophenol with various substituted aldehydes in good to excellent isolated yields (85–95%) using water as a solvent at ambient temperature. Several solvents were examined for this reaction; however, in terms of reaction yield and time, water was found to be the optimum solvent. The remarkable advantages offered by this method are an inexpensive and easily available catalyst, a simple procedure, mild conditions, much faster (60–90 min) reactions, and good to excellent yields of products.

Low temperature hydrodeoxygenation of phenols under ambient hydrogen pressure to form cyclohexanes catalysed by Pt nanoparticles supported on H-ZSM-5

2015 ◽  
Vol 51 (95) ◽  
pp. 17000-17003 ◽  
Author(s):  
Hidetoshi Ohta ◽  
Kentaro Yamamoto ◽  
Minoru Hayashi ◽  
Go Hamasaka ◽  
Yasuhiro Uozumi ◽  
...  
Keyword(s):  
Low Temperature ◽  
Hydrogen Pressure ◽  
Pt Nanoparticles ◽  
Mild Conditions

The hydrodeoxygenation of various phenols to form cyclohexanes under mild conditions (ambient H2 pressure and 110 °C) was developed by using a Pt/H-ZSM-5 catalyst and octane as the solvent.

scholarly journals Conversion of furfural to tetrahydrofuran-derived secondary amines under mild conditions

2020 ◽  
Vol 22 (6) ◽  
pp. 1832-1836
Author(s):  
Shi Jiang ◽  
Eric Muller ◽  
François Jerôme ◽  
Marc Pera-Titus ◽  
Karine De Oliveira Vigier
Keyword(s):  
Hydrogen Pressure ◽  
Catalytic Conversion ◽  
Secondary Amines ◽  
Mild Conditions

Catalytic conversion of furfural to secondary tetrafurfurylamine under mild conditions of temperature and hydrogen pressure.

scholarly journals Silica-supported sulfonic acids as recyclable catalyst for esterification of levulinic acid with stoichiometric amounts of alcohols

2016 ◽  
Vol 12 ◽  
pp. 2173-2180 ◽  
Author(s):  
Raimondo Maggi ◽  
N Raveendran Shiju ◽  
Veronica Santacroce ◽  
Giovanni Maestri ◽  
Franca Bigi ◽  
...  
Keyword(s):  
Sulfonic Acid ◽  
Levulinic Acid ◽  
Active Sites ◽  
Solid Acid ◽  
Value Added ◽  
Acid Catalysts ◽  
Mild Conditions ◽  
Simple Protocol ◽  
Sulfonic Acid Groups

Converting biomass into value-added chemicals holds the key to sustainable long-term carbon resource management. In this context, levulinic acid, which is easily obtained from cellulose, is valuable since it can be transformed into a variety of industrially relevant fine chemicals. Here we present a simple protocol for the selective esterification of levulinic acid using solid acid catalysts. Silica supported sulfonic acid catalysts operate under mild conditions and give good conversion and selectivity with stoichiometric amounts of alcohols. The sulfonic acid groups are tethered to the support using organic tethers. These tethers may help in preventing the deactivation of the active sites in the presence of water.

Catalytic conversion of biomass-derived levulinic acid into alcohols over nanoporous Ru catalyst

2018 ◽  
Vol 8 (4) ◽  
pp. 975-979 ◽  
Author(s):  
Jinkun Lv ◽  
Zeming Rong ◽  
Liming Sun ◽  
Chengyun Liu ◽  
An-Hui Lu ◽  
...  
Keyword(s):  
Levulinic Acid ◽  
High Selectivity ◽  
Catalytic Conversion ◽  
Monohydric Alcohol ◽  
Ru Catalyst ◽  
Mild Conditions

1,4-pentanediol or monohydric alcohol were achieved with high selectivity from levulinic acid under relatively mild conditions using nanoporous Ru.

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