Integrated Reactor for Ionic Liquid Hydrocarbon Conversion
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Solution Overview
Problem
Existing hydrocarbon conversion processes using ionic liquids face challenges in achieving efficient mixing and heat removal while maintaining catalyst separation, leading to suboptimal product yields and quality.
Innovation Solution
An integrated reactor system featuring a bundle of heat exchanger tubing, baffles, and high-speed jet flow nozzles for intimate mixing and heat transfer, combined with a settling zone for catalyst separation, effectively addresses these challenges by promoting rapid mixing, heat removal, and catalyst separation within the hydrocarbon conversion reactor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If ionic liquid catalyst and reactants are mixed in conventional reactors, then catalytic conversion occurs, but mixing efficiency is insufficient leading to suboptimal product yields
Solution Approach 1:
The reactor is segmented into distinct functional zones: a reaction zone with high-speed jet flow nozzles for intensive mixing, a heat exchange zone with tubing for thermal management, and a settling zone for catalyst separation. This segmentation allows each zone to optimize its specific function while collectively resolving the mixing efficiency challenge.
Solution Approach 2:
The patent introduces an intermediary fluidization medium that facilitates intimate mixing between the ionic liquid catalyst and hydrocarbon reactants. This intermediary enables efficient mass transfer and catalytic contact without requiring direct mechanical agitation, thereby improving product yield while avoiding excessive mechanical complexity.
2Temperature
If conventional heat exchange methods are used in hydrocarbon conversion reactors, then heat removal occurs, but heat transfer efficiency is insufficient leading to temperature control issues
Solution Approach 1:
The heat exchange tubing is nested within the reaction zone in a configuration where the tubing passes through multiple baffles and is surrounded by the reacting fluid. This nested arrangement maximizes the heat transfer surface area within the available reactor volume, enabling efficient heat removal without adding external heat exchange equipment.
Solution Approach 2:
The heat exchange system transitions from conventional external heat exchangers to an internal three-dimensional network of tubing that extends throughout the reaction zone. This dimensional transformation allows heat transfer to occur simultaneously at multiple locations and depths within the reactor, dramatically improving thermal management efficiency.
3Productivity
If ionic liquid catalyst is used for hydrocarbon conversion, then catalytic activity is achieved, but catalyst separation from products is difficult leading to product purification challenges
Solution Approach 1:
The settling zone is designed to extract and separate the ionic liquid catalyst from the hydrocarbon product stream through density-based phase separation. The separated catalyst is then recycled back to the reaction zone, while the purified product is withdrawn. This extraction approach simplifies product purification by physically removing the catalyst before product processing.
Solution Approach 2:
The system utilizes the inherent density difference between the ionic liquid catalyst and hydrocarbon products to enable automatic phase separation in the settling zone. This self-service separation mechanism requires no additional energy input or complex separation equipment, as the density-driven phase division occurs naturally under gravity.
4Productivity
If high mixing intensity is applied to improve catalytic contact, then reaction efficiency increases, but energy consumption increases
Solution Approach 1:
The system replaces conventional mechanical agitation (high-energy stirring) with high-speed jet flow injection that utilizes fluid kinetic energy to create intensive mixing. The jet streams generate turbulence and eddy currents that facilitate catalyst- reactant contact without requiring mechanical work input, thereby maintaining high reaction efficiency while minimizing energy consumption.
Solution Approach 2:
The mixing process exploits phase transition dynamics where the injected jet streams undergo rapid expansion and mixing with the surrounding fluid. This phase transition-driven mixing mechanism converts the kinetic energy of the jet streams directly into mixing action, achieving high-intensity contact without continuous energy input from mechanical sources.
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 integrated reactor system enhances the yield and selectivity of hydrocarbon conversion products by ensuring efficient mixing, effective heat management, and efficient catalyst separation, resulting in higher quality alkylate products such as gasoline, diesel fuel, and base oil.
Implementation Method 1
multiple high speed jet flow nozzles configured to direct an ionic liquid catalyst and reactants into the hydrocarbon conversion reactor
Implementation Method 2
a bundle of heat exchanger tubing that extends predominantly through an internal length of the hydrocarbon conversion reactor
Implementation Method 3
a settling zone internal to the hydrocarbon conversion reactor
Data Source
AI summary
An integrated reactor system for performing an ionic liquid-catalyzed hydrocarbon conversion is provided. The integrated reactor system provides intimate and rapid mixing between hydrocarbon reactants and ionic liquid catalysts while simultaneously removing reaction heat with a heat exchanger that is internal to the hydrocarbon conversion reactor.