Plasma-Based Sulfur Oxidation Process

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Solution Overview

Problem

Current sulfuric acid production processes require multiple steps, expensive vanadium pentoxide catalysts, and generate excessive CO2, while also being inefficient in oxidizing sulfur and sulfur dioxide.

Innovation Solution

A plasma-based method that decomposes CO2 to form reactive radicals, which are used to oxidize sulfur and sulfur dioxide simultaneously, reducing the process steps and eliminating the need for costly catalysts by forming SO2 and SO3 in a single step.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional multi-step oxidation process is used to produce sulfuric acid, then sulfur and sulfur dioxide can be oxidized, but the process requires multiple steps, expensive catalysts, and generates excessive CO2 emissions

Engineering Contradiction:

Improveoxidation efficiencyVSAvoidprocess steps

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent combines the oxidation of sulfur and sulfur dioxide into a single integrated process step using plasma technology. Instead of separate catalytic stages requiring vanadium pentoxide, the plasma reactor simultaneously performs both oxidations in one continuous operation, reducing equipment complexity and eliminating catalyst requirements.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The invention replaces the traditional mechanical/chemical catalytic system with a plasma-based energy field system. The plasma provides the necessary activation energy for oxidation reactions without requiring physical catalyst beds, heat exchangers, or complex control mechanisms, thereby simplifying the overall process architecture.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If vanadium pentoxide catalysts are used for sulfur oxidation, then oxidation reactions can proceed, but the catalysts are expensive, toxic, require replacement, and need very dry SO2 conditions

Engineering Contradiction:

Improveoxidation reaction reliabilityVSAvoidcatalyst toxicity and cost

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent eliminates the need for expensive, long-lived catalysts by using a disposable-free plasma field that provides transient high-energy states for reaction activation. The plasma acts as a temporary, controllable energy source that doesn't require replacement or maintenance, avoiding the toxicology and cost issues of vanadium pentoxide.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The invention changes the fundamental reaction parameters from low-temperature catalytic conditions to high-temperature plasma conditions. This parameter shift allows oxidation to proceed without catalysts, eliminating the need for严格控制 of moisture content and removing dependence on toxic materials while maintaining reliable reaction performance.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If oxygen is used to oxidize sulfur in traditional processes, then sulfur oxidation can occur, but excessive CO2 emissions are generated and the process is inefficient

Engineering Contradiction:

Improvesulfur oxidation efficiencyVSAvoidCO2 emissions

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent uses plasma-generated oxygen radicals and excited oxygen species as strong oxidants that are more reactive than molecular oxygen. These highly reactive species accelerate the oxidation of sulfur and sulfur dioxide, improving conversion efficiency and reducing the energy input required, thereby lowering associated CO2 emissions from energy generation.

Inventive Principle:

Principle #38Strong oxidants (Accelerated oxidation)

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 method significantly reduces CO2 emissions, increases the yield of sulfuric acid production, and eliminates the need for costly catalysts by achieving higher SO3 production in a single step, making the process more efficient and cost-effective.

Implementation Method 1

decomposing CO2 to form carbonyl (CO) radicals and oxygen (O) radicals by igniting a plasma in a plasma process fluid stream comprising said CO2

Methodology Applied

Scientific EffectPlasma decomposition: Plasma

Implementation Method 2

decomposing CO2 to form carbonyl (CO) radicals and oxygen (O) radicals by igniting a plasma

Methodology Applied

Scientific EffectRadical formation: Photodissociation

Implementation Method 3

contacting reactant sulfur and/or reactant sulfur dioxide with said oxygen radicals, thereby: oxidizing said reactant sulfur to product sulfur dioxide and/or product sulfur trioxide, and/or oxidizing said reactant sulfur dioxide to product sulfur trioxide

Methodology Applied

Scientific EffectOxidation: Oxidation

Data Source

PatentUS20240417255A1Sulfur Driven Carbon Monoxide Production Process

Publication Date: 2024.12.19 D CRBN BV

AI summary

The present invention concerns a method for oxidizing reactant sulfur(S) and/or reactant sulfur dioxide (SO2) by means of carbon dioxide (CO2), comprising the steps of: a) decomposing CO2 to form carbonyl (CO) radicals and oxygen (O) radicals by igniting a plasma in a plasma process fluid stream comprising said CO2: b) contacting reactant sulfur and/or reactant sulfur dioxide with said oxygen radicals, thereby: oxidizing said reactant sulfur to product sulfur dioxide and/or product sulfur trioxide (SO3), and/or oxidizing said reactant sulfur dioxide to product sulfur trioxide, thereby obtaining an outlet fluid stream comprising said product sulfur dioxide and/or said product sulfur trioxide.