Acid-Assisted Hydrogenation of CO2 to Methanol Using Ru(II) and Rh(III) RAPTA-Type Catalysts under mild conditions

2021 ◽  
Author(s):  
Manoj Trivedi ◽  
Pooja Sharma ◽  
Indresh Kumar Pandey ◽  
Abhinav Kumar ◽  
Sanjay Kumar Batra ◽  
...  
Keyword(s):  
Catalyst System ◽  
Homogeneous Catalyst ◽  
Rhodium Catalysts ◽  
Hydrogenation Of Co2 ◽  
Mild Conditions ◽  
Highly Efficient

A highly efficient homogeneous catalyst system for production of CH3OH from CO2 using single molecular defined ruthenium and rhodium RAPTA-Type catalysts [Ru(ƞ6-p-cymene)X2(PTA)] (X=I(1), Cl(2); PTA=1,3,5-triaza-7-phosphaadamantane and rhodium catalysts [Rh(ƞ5-C5Me5)X2(PTA/PTA-BH3)] (X=Cl(3),...

Conversion of lignin model compounds under mild conditions in pseudo-homogeneous systems

2016 ◽  
Vol 18 (8) ◽  
pp. 2341-2352 ◽  
Author(s):  
Lu Chen ◽  
Jiayu Xin ◽  
Lingli Ni ◽  
Huixian Dong ◽  
Dongxia Yan ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Catalyst System ◽  
Noble Metal Nanoparticles ◽  
Homogeneous Catalyst ◽  
Model Compounds ◽  
Lignin Model Compounds ◽  
Mild Conditions ◽  
Lignin Model

A novel pseudo-homogeneous catalyst system consisting of noble metal nanoparticles and ionic liquids is developed for the selective reductive cleavage of C–O and hydrodeoxygenation under mild conditions.

scholarly journals Unprecedented Use of NHC Gold (I) Complexes as Catalysts for the Selective Oxidation of Ethane to Acetic Acid

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4294
Author(s):  
Ana P. C. Ribeiro ◽  
Inês A. S. Matias ◽  
Poorya Zargaran ◽  
A. Stephen K. Hashmi ◽  
Luísa M. D. R. S. Martins
Keyword(s):  
Acetic Acid ◽  
High Temperature ◽  
Selective Oxidation ◽  
Rhodium Catalysts ◽  
Ethane Oxidation ◽  
Methanol Carbonylation ◽  
Mild Conditions ◽  
Highly Efficient ◽  
Conversion Of Methane

The highly efficient eco-friendly synthesis of acetic acid (40% yield) directly from ethane is achieved by the unprecedented use of N-heterocyclic carbene (NHC) and N-heterocyclic oxo-carbene (NHOC) gold(I) catalysts in mild conditions. This is a selective and promising protocol to generate directly acetic acid from ethane, in comparison with the two most used methods: (i) the three-step, capital- and energy-intensive process based on the high-temperature conversion of methane to acetic acid; (ii) the current industrial methanol carbonylation processes, based in iridium and expensive rhodium catalysts. Green metrics determinations highlight the environmental advantages of the new ethane oxidation procedure. Comparison with previous reported published catalysts is performed to highlight the features of this remarkable protocol.

scholarly journals Highly Efficient MOF Catalyst Systems for CO2 Conversion to Bis-Cyclic Carbonates as Building Blocks for NIPHUs (Non-Isocyanate Polyhydroxyurethanes) Synthesis

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 628
Author(s):  
Adolfo Benedito ◽  
Eider Acarreta ◽  
Enrique Giménez
Keyword(s):  
Molar Mass ◽  
Cycloaddition Reaction ◽  
Building Blocks ◽  
Catalyst System ◽  
Cyclic Carbonate ◽  
Ammonium Bromide ◽  
Cyclic Carbonates ◽  
High Molar Mass ◽  
Highly Efficient ◽  
Free Process

The present paper describes a greener sustainable route toward the synthesis of NIPHUs. We report a highly efficient solvent-free process to produce [4,4′-bi(1,3-dioxolane)]-2,2′-dione (BDC), involving CO2, as renewable feedstock, and bis-epoxide (1,3-butadiendiepoxide) using only metal–organic frameworks (MOFs) as catalysts and cetyltrimethyl-ammonium bromide (CTAB) as a co-catalyst. This synthetic procedure is evaluated in the context of reducing global emissions of waste CO2 and converting CO2 into useful chemical feedstocks. The reaction was carried out in a pressurized reactor at pressures of 30 bars and controlled temperatures of around 120–130 °C. This study examines how reaction parameters such as catalyst used, temperature, or reaction time can influence the molar mass, yield, or reactivity of BDC. High BDC reactivity is essential for producing high molar mass linear non-isocyanate polyhydroxyurethane (NIPHU) via melt-phase polyaddition with aliphatic diamines. The optimized Al-OH-fumarate catalyst system described in this paper exhibited a 78% GC-MS conversion for the desired cyclic carbonates, in the absence of a solvent and a 50 wt % chemically fixed CO2. The cycloaddition reaction could also be carried out in the absence of CTAB, although lower cyclic carbonate yields were observed.

Unprecedentedly high efficiency for photocatalytic conversion of methane to methanol over Au–Pd/TiO2 – what is the role of each component in the system?

2021 ◽  
Author(s):  
Xiaojiao Cai ◽  
Siyuan Fang ◽  
Yun Hang Hu
Keyword(s):  
Methane Conversion ◽  
High Efficiency ◽  
Mild Conditions ◽  
Highly Efficient ◽  
System P ◽  
Conversion Of Methane

Direct and highly efficient methane conversion to methanol under mild conditions is achieved via photocatalysis over Au–Pd/TiO2.

Phosphine-stabilized, oxide-supported rhodium catalysts for highly efficient silylative coupling reactions

2015 ◽  
Vol 41 (12) ◽  
pp. 9575-9586 ◽  
Author(s):  
Shinji Tsukada ◽  
Kenji Wada ◽  
Hiroki Miura ◽  
Saburo Hosokawa ◽  
Ryu Abe ◽  
...  
Keyword(s):  
Rhodium Catalysts ◽  
Coupling Reactions ◽  
Highly Efficient

Lead-Free Perovskite Cs3Bi2Br9 Heterojunctions for Highly Efficient and Selective Photocatalysis Under Mild Conditions

2021 ◽  
pp. 162326
Author(s):  
Qimeng Sun ◽  
Wen Ye ◽  
Jialiang Wei ◽  
Lanxin Li ◽  
Jia Wang ◽  
...  
Keyword(s):  
Lead Free ◽  
Mild Conditions ◽  
Highly Efficient
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