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Recent Advances in Catalytic Conversion of Bioethanol to 1,3-Butadiene: Reaction Mechanism, Catalyst Design, and

Abhishek R Varma¹, Md Ziyaur Rahman^1,2, Siddharth Gadkari³

¹Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Sangareddy, India.

|November 26, 2025

Summary

Sustainable production of 1,3-butadiene (BD) from ethanol is crucial for a circular economy. Research focuses on optimizing multifunctional catalysts and reaction parameters for efficient Ethanol-to-BD (ETB) processes, overcoming key challenges for commercialization.

Area of Science:

Chemical Engineering
Catalysis
Green Chemistry

Background:

1,3-Butadiene (BD) is a key precursor for synthetic rubbers, traditionally sourced from fossil fuels.
Sustainable BD production is vital for environmental preservation and the circular economy.
Ethanol-to-Butadiene (ETB) processes offer a renewable alternative, utilizing biomass-derived ethanol.

Purpose of the Study:

To critically review the current research progress in Ethanol-to-Butadiene (ETB) processes.
To analyze historical perspectives, reaction mechanisms, kinetics, thermodynamics, and catalysts for ETB.
To evaluate the economic-environmental impact and identify challenges for commercializing ETB.

Main Methods:

Comprehensive literature review of Ethanol-to-Butadiene (ETB) processes.
Analysis of reaction mechanisms, including dehydrogenation, C-C coupling, and dehydration.
Examination of multifunctional heterogeneous catalysts, such as metal/metal oxide-modified MgO-SiO2 and Zn-Zr mixed oxides.

Main Results:

ETB processes involve complex catalytic sequences requiring a balance of acidic, basic, redox, and metal functionalities.
Uniform distribution and cooperation of catalytic sites are critical but challenging.
Despite mechanistic understanding, catalyst design for high BD selectivity and scalability remains an obstacle.

Conclusions:

Advancements in ETB processes are significant, but catalyst design for selectivity and scalability is key to commercial success.
Optimizing multifunctional catalysts and reaction parameters is essential for sustainable BD production.
This review provides a foundation for future research and industrial optimization of ETB technology.

Keywords:

1,3‐butadiene ethanol heterogeneous catalyst reaction mechanism thermodynamic analysis

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