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Preparation of Alcohols via Addition Reactions

Preparation of Alcohols via Addition Reactions

Overview
The acid-catalyzed addition of water to the double bond of alkenes is a large-scale industrial method used to synthesize low-molecular-weight alcohols. An acidic atmosphere is required to allow the hydrogen in the water molecule to act as an electrophile and attack the double bond in an alkene. The addition of a proton to the double bond creates a carbocation intermediate. The proton preferentially bonds to the less substituted end of the double bond to create a more stable carbocation...

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...

Reduction of Alkenes: Catalytic Hydrogenation

Reduction of Alkenes: Catalytic Hydrogenation

Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...

Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation

Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation

Unlike the easy catalytic hydrogenation of an alkene double bond, hydrogenation of a benzene double bond under similar reaction conditions does not take place easily. For example, in the reduction of stilbene, the benzene ring remains unaffected while the alkene bond gets reduced. Hydrogenation of an alkene double bond is exothermic and a favorable process. In contrast, to hydrogenate the first unsaturated bond of benzene, an energy input is needed; that is, the process is endothermic. This is...

Ethers from Alkenes: Alcohol Addition and Alkoxymercuration-Demercuration

Ethers from Alkenes: Alcohol Addition and Alkoxymercuration-Demercuration

Overview
Ethers can also be prepared from alkenes through acid-catalyzed addition of alcohols and alkoxymercuration–demercuration.
Preparation of Ethers by Acid-Catalyzed Addition of Alcohol to Alkenes
The acid-catalyzed addition of alcohol to an alkene involves treating the alkene with an excess of alcohol in the presence of an acid catalyst to form an ether under suitable conditions. The hydrogen will add to the less substituted carbon so that the nucleophile can attack the more substituted...

Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.

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Updated: Dec 31, 2025

Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy

Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy

Published on: November 9, 2019

Methanol Synthesis from CO₂ Hydrogenation.

Michael Bowker^1,2

¹Cardiff Catalysis Institute School of Chemistry Cardiff University Cardiff CF10 3AT UK.

|January 3, 2020

Summary

Sustainable energy storage is crucial. This research explores producing methanol from carbon dioxide (CO2) and green hydrogen, offering a viable liquid fuel alternative for renewable energy.

Keywords:

Carbon dioxide hydrogenation ZnO catalysts copper catalysts methanol plant sustainable methanol

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Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

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Last Updated: Dec 31, 2025

Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy

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Published on: November 9, 2019

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

Area of Science:

Renewable Energy Storage
Catalysis and Chemical Engineering
Sustainable Fuels

Background:

Renewable energy sources like solar and wind are intermittent, necessitating efficient energy storage solutions.
Hydrogen production via electrolysis is a key method for storing renewable energy chemically.
Liquid energy carriers such as methanol are essential for high-density energy storage.

Purpose of the Study:

To review current and novel catalytic processes for synthesizing methanol from carbon dioxide (CO2) and hydrogen.
To highlight the potential of utilizing captured CO2 as a feedstock for sustainable methanol production.
To discuss the importance of methanol as an energy-dense liquid fuel for a renewable energy future.

Main Methods:

Review of existing literature on methanol synthesis pathways.
Analysis of catalytic processes utilizing CO2 and hydrogen.
Examination of industrial-scale methanol production technologies and demonstrator plants.

Main Results:

Methanol can be synthesized from CO2 and hydrogen using various catalytic approaches.
Sustainable hydrogen production is key to the viability of CO2-based methanol synthesis.
Demonstrator plants are under construction, showcasing the feasibility of this technology.

Conclusions:

Methanol synthesis from CO2 and sustainable hydrogen presents a promising route for renewable energy storage.
This process offers a method to convert captured CO2 into a valuable liquid fuel.
Continued research and development in catalysis are vital for advancing this sustainable energy solution.