Iron Catalyst Hydrocracking Reduces Coke in Vacuum Resid
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Solution Overview
Problem
Current processes for converting heavy hydrocarbons into lighter fuels face limitations such as low yield in physical separation, high temperature requirements, excessive coke production, and unreported metal content in products, necessitating a more efficient and cost-effective method for hydrocracking that minimizes coke formation and maximizes the commercial value of by-products.
Innovation Solution
A catalyst and process using an oil-soluble organometallic iron compound that decomposes into nano-sized metallic iron particles, allowing better dispersion and activity within asphaltene micelles, reducing coke formation and enabling the production of premium lighter hydrocarbon products, with the added benefit of converting coke into graphitic grade carbon.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If thermal conversion processes (visbreaking, delayed coking, fluid coking) are used to convert heavy hydrocarbons into lighter fuels, then conversion efficiency is improved, but high temperatures above 500°C are required and low quality by-product coke is generated
Solution Approach 1:
The invention changes the temperature parameter from above 500°C to below 500°C by introducing a catalytic hydrocracking process with iron-based catalysts, achieving high conversion efficiency at lower temperatures through catalytic activity rather than thermal energy alone
Solution Approach 2:
The invention introduces iron-based catalysts (FeCl3, FeBr3, or iron-containing zeolites) as intermediaries to mediate the hydrocracking reaction, enabling the conversion of heavy hydrocarbons to lighter fuels at lower temperatures by providing alternative reaction pathways with lower activation energy
2Productivity
If thermal conversion processes are used to convert heavy hydrocarbons, then conversion is achieved, but low quality by-product coke is generated
Solution Approach 1:
The invention converts the harmful coke by-product into valuable graphitic carbon material by controlling the hydrocracking process conditions and using iron-based catalysts that promote graphitization, transforming a waste product into a commercially valuable material with applications in electrodes, lubricants, and composite materials
Solution Approach 2:
The iron-based catalysts serve as intermediaries that not only facilitate hydrocracking but also promote the transformation of coke precursors into graphitic structures, thereby converting harmful coke into beneficial graphitic carbon
3Measurement precision
If physical separation processes (vacuum distillation, steam distillation, solvent deasphalting) are used, then liquid hydrocarbon fraction is recovered, but yield is low and asphaltene materials must be disposed of separately
Solution Approach 1:
The invention replaces mechanical physical separation processes with a chemical catalytic hydrocracking process, transforming the separation-based approach into a reaction-based approach that converts heavy hydrocarbons and asphaltenes into valuable lighter fuel products rather than merely separating them
Solution Approach 2:
The invention changes the fundamental parameter from physical separation to chemical transformation, using catalytic hydrocracking to convert asphaltenes and heavy hydrocarbons into lighter fuels, thereby increasing yield from disposal-worthy waste into saleable products
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 process achieves higher conversion of heavy hydrocarbons with reduced coke production, producing premium lighter hydrocarbon products and graphitic grade carbon, which can be commercially valuable, while avoiding the need for expensive catalyst handling and high temperatures.
Implementation Method 1
A catalyst and process using an oil-soluble organometallic iron compound that decomposes into nano-sized metallic iron particles
Implementation Method 2
A catalyst and process for hydrocracking of heavy oils into lighter hydrocarbon products
Implementation Method 3
with the added benefit of converting coke into graphitic grade carbon
Data Source
AI summary
The present invention discloses a catalyst and process for hydrocracking of heavy hydrocarbon oils having majority portion boiling above 525° C. in the presence of hydrogen. A process comprising first step of converting heavy oil into lighter products in the presence of catalyst and hydrogen in slurry phase is disclosed. The process further comprises recycling of part of liquid products (HVGO) along with fresh heavy oil for improving the product selectivity. This recycled HVGO is having high concentrations of aromatics compounds. The separation of particles generated during the reaction at reactor exit also avoids the chances of choking of downstream sections.