Fe-CeO2 Oxychlorination Catalyst for Higher Selectivity
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Solution Overview
Problem
Existing oxychlorination processes of hydrocarbons face challenges in controlling selectivity and generate significant byproducts such as carbon monoxide and carbon dioxide due to reliance on high temperature pyrolysis, which affects the efficiency and cost-effectiveness.
Innovation Solution
A catalyst comprising iron (Fe) supported on a cerium oxide (CeO2) carrier is used in the oxychlorination process, optimizing the catalyst composition to enhance oxidation-reduction ability and minimize byproduct formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high temperature pyrolysis is used for oxychlorination of hydrocarbons, then reaction rate is improved, but selectivity deteriorates and byproducts such as carbon monoxide and carbon dioxide are generated
Solution Approach 1:
A catalyst comprising iron supported on cerium oxide carrier is introduced as an intermediary substance to facilitate the oxychlorination reaction. The catalyst provides an alternative reaction pathway that achieves high reaction rates at lower temperatures, preventing direct high-temperature pyrolysis that leads to poor selectivity and byproduct formation.
Solution Approach 2:
The invention changes the temperature parameter from high temperature pyrolysis conditions to lower temperature catalytic conditions. By using the iron-cerium oxide catalyst, the reaction can proceed efficiently at reduced temperatures, thereby improving selectivity and reducing unwanted byproducts while maintaining acceptable reaction rates.
2Reliability
If high temperature pyrolysis is used for oxychlorination of hydrocarbons, then reaction completeness is improved, but energy consumption increases
Solution Approach 1:
The iron-cerium oxide catalyst acts as an intermediary that enables the reaction to reach completeness at lower temperatures. The catalyst lowers the activation energy barrier, allowing the reaction to proceed to completion without requiring high temperature inputs, thus reducing energy consumption while maintaining reaction effectiveness.
Solution Approach 2:
The invention replaces the thermal energy input system (high temperature pyrolysis) with a catalytic system. Instead of relying on high thermal energy to drive the reaction to completion, the catalytic mechanism facilitates the reaction pathway, substituting thermal forcing with catalytic promotion and thereby reducing energy consumption.
3Productivity
If high temperature pyrolysis is used for oxychlorination of hydrocarbons, then conversion rate is improved, but byproduct formation increases
Solution Approach 1:
The iron-cerium oxide catalyst serves as an intermediary that directs the reaction toward the desired oxychlorination products. By providing specific active sites and reaction pathways, the catalyst promotes selective conversion of hydrocarbons to target products while minimizing side reactions that generate harmful byproducts, thus maintaining high conversion rates with improved selectivity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The catalyst increases the selectivity of target products like chloromethane while reducing the production of carbon monoxide and carbon dioxide, even at lower temperatures, thereby improving process efficiency and reducing costs.
Implementation Method 1
supporting a catalyst material including iron (Fe) on the carrier
Implementation Method 2
a catalyst for an oxychlorination process of hydrocarbons, the catalyst including: a catalyst material including iron (Fe); and a carrier including cerium oxide (CeO2)
Implementation Method 3
optimizing the catalyst composition to enhance oxidation-reduction ability
Data Source
AI summary
A catalyst for an oxychlorination process of hydrocarbons, a preparation method thereof, and a method for preparing an oxychlorination compound of hydrocarbons using the same.