Layered Catalyst Reactor for Biooil Hydrodeoxygenation
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Solution Overview
Problem
Current methods for converting biological materials into hydrocarbons for fuel are inefficient and do not effectively utilize catalysts to produce high-quality fuel components, particularly from non-edible oils like crude tall oil, which contains impurities that can harm catalysts and affect product quality.
Innovation Solution
A process using a reactor with layered catalysts, where a hydrodeoxygenation (HDO) catalyst and a hydrodewaxing (HDW) catalyst are combined in specific ratios, with the proportion of HDW catalyst increasing towards the bottom, to convert biological feed materials like crude tall oil into hydrocarbons, removing impurities and improving fuel properties through hydroprocessing, isomerization, and cracking reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional catalysts are used to convert biological materials into hydrocarbons, then the conversion process can proceed, but the catalyst efficiency is low and impurities in the feed material harm the catalyst performance
Solution Approach 1:
The catalyst system is segmented into multiple functional layers within the reactor. The first layer contains HDO catalyst for hydrodeoxygenation, the second layer contains HDW catalyst for hydrodewaxing, and guard beds are positioned between layers and at reactor outlets. This segmentation allows each catalyst layer to perform its specific function while being protected from impurities by downstream guard beds, thereby maintaining high catalyst performance and efficiency
Solution Approach 2:
Guard beds act as intermediary protective layers between the feed material/catalyst layers and the catalysts themselves. These guard beds contain impurities and harmful substances before they can reach and damage the active catalyst layers, serving as a mediator that protects the catalyst while allowing the conversion process to proceed
2Manufacturing precision
If multiple catalyst layers are used to improve fuel quality, then product quality improves, but reactor complexity increases
Solution Approach 1:
The reactor is divided into distinct functional zones with separate catalyst layers (HDO layer, HDW layer) and guard beds positioned at specific locations. Each layer is packed with specific catalyst materials in controlled proportions, creating a structured multi-functional system that achieves high fuel quality through sequential chemical transformations while maintaining manageable operational complexity
Solution Approach 2:
Different regions of the reactor are designed with different catalyst compositions and functions. The first catalyst layer is optimized for hydrodeoxygenation, the second layer for hydrodewaxing, with guard beds strategically positioned to protect specific catalyst layers. This local optimization of catalyst properties in different reactor zones enables production of high-quality fuel with improved cold flow properties and octane number
3Duration of action of stationary object
If guard beds are added to protect catalysts and extend catalyst life, then catalyst durability improves, but device complexity and operational complexity increase
Solution Approach 1:
Guard beds are pre-positioned within the reactor at strategic locations (between catalyst layers and at reactor outlets) before the conversion process begins. These guard beds are prepared in advance to capture impurities and protect the catalyst layers, extending catalyst life without requiring complex operational interventions during the conversion process itself
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
This process efficiently converts biological materials into high-quality hydrocarbon fuels with improved cold flow properties and octane number, effectively removing impurities and extending catalyst life by using guard beds and optimizing reactor conditions such as temperature and pressure.
Implementation Method 1
hydrodeoxygenation (HDO) catalyst and a hydrodewaxing (HDW) catalyst are combined in specific ratios
Implementation Method 2
A process using a reactor with layered catalysts, where a hydrodeoxygenation (HDO) catalyst and a hydrodewaxing (HDW) catalyst are combined
Implementation Method 3
improving fuel properties through hydroprocessing, isomerization, and cracking reactions
Implementation Method 4
improving fuel properties through hydroprocessing, isomerization, and cracking reactions
Data Source
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AI summary
The present invention relates to a process for catalytically converting material of biological origin into hydrocarbons useful as fuel components. The process includes hydrodeoxygenation and isomerisation of the material. The present invention relates also to a reactor and an apparatus suitable for use in the process.