Zeolite Catalyst Cracking Sulfur-Containing Fuel

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Solution Overview

Problem

Current methods for converting high-C hydrocarbon fuels like JP-8 into low-C hydrocarbon fuels are limited by the need for desulfurization and inefficient catalysts, which complicates logistics and reduces conversion efficiency.

Innovation Solution

The use of aluminosilicate and zeolite catalysts, potentially doped with precious metals, to crack high-C hydrocarbon fuels into low-C hydrocarbon fuels without requiring desulfurization, utilizing a cracking mechanism that promotes the conversion of sulfur-containing JP-8 into propane and other low-C hydrocarbons with high efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional catalysts are used for converting high-C hydrocarbon fuel to low-C hydrocarbon fuel, then the conversion process requires desulfurization, but this complicates logistics and reduces conversion efficiency

Engineering Contradiction:

Improveconversion efficiencyVSAvoidprocess complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent extracts and removes sulfur from the high-C hydrocarbon fuel stream before the cracking reaction occurs. By placing a desulfurization unit upstream of the catalytic cracker, sulfur is separated out, preventing catalyst poisoning and eliminating the need for complex sulfur-tolerant catalyst designs, thereby simplifying the overall process while maintaining high conversion efficiency

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent performs desulfurization as a preliminary action before the main cracking conversion process. By removing sulfur contaminants in advance, the catalyst operates in a cleaner environment, maintaining higher activity and stability, which improves overall conversion efficiency without requiring complex sulfur-resistant catalyst formulations

Inventive Principle:

Principle #10Preliminary action

2Reliability

If desulfurization is performed before cracking, then catalyst stability is improved, but the process complexity and logistics are worsened

Engineering Contradiction:

Improvecatalyst stabilityVSAvoidprocess complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges the desulfurization and cracking processes into a single integrated flow stream. The effluent from the desulfurization unit is directly fed to the catalytic cracker without intermediate separation or handling steps. This integration maintains catalyst stability through effective desulfurization while avoiding the logistical complexity of separate processing units and intermediate storage

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent uses a hydroprocessing catalyst as an intermediary that performs both desulfurization and prepares the feedstock for cracking in a single step. This intermediary catalytic stage removes sulfur while also conditioning the hydrocarbon molecules, thereby protecting the downstream cracking catalyst and simplifying the overall process architecture

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of operation

If sulfur-containing fuel is used directly in cracking, then logistics are simplified, but catalyst performance and stability are reduced

Engineering Contradiction:

Improvelogistics simplicityVSAvoidcatalyst stability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent converts the harmful effect of sulfur in the fuel by using it as a driving force for the desulfurization reaction. The hydroprocessing catalyst selectively binds and removes sulfur compounds from the JP-8 fuel, transforming the problematic sulfur content into removable byproducts while protecting the cracking catalyst, thereby maintaining logistics simplicity with improved catalyst stability

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 approach achieves up to 25% conversion efficiency of high-C hydrocarbons to low-C hydrocarbons, with the potential for further optimization, and allows for the separation of sulfur content from the low-C hydrocarbon product, simplifying logistics and improving catalyst stability.

Implementation Method 1

a catalytic material (e.g., an aluminosilicate and/or a zeolite) can be introduced to the high-C hydrocarbon fuel to produce a product stream comprising a low-C hydrocarbon fuel

Methodology Applied

Scientific EffectCatalysis: Catalysis

Implementation Method 2

utilizing a cracking mechanism that promotes the conversion of sulfur-containing JP-8 into propane and other low-C hydrocarbons with high efficiency

Methodology Applied

Scientific EffectCracking: Pyrolysis

Data Source

PatentUS10245580B2Highly active decomposition catalyst for low carbon hydrocarbon production from sulfur containing fuel

Publication Date: 2019.04.02 UNIVERSITY OF SOUTH CAROLINA

AI summary

Methods for deriving a low-C hydrocarbon fuel from a high-C hydrocarbon fuel are generally provided. A catalytic material (e.g., an aluminosilicate and/or a zeolite) can be introduced to the high-C hydrocarbon fuel to produce a product stream comprising a low-C hydrocarbon fuel, and the low-C hydrocarbon fuel can be separated in the product stream from any remaining high-C hydrocarbon fuel.