Shockwave Steam Cracking for Low-Carbon Olefin Production
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Solution Overview
Problem
Conventional steam cracking processes emit high levels of greenhouse gases due to reliance on fossil fuels for heating, and existing electrical heating methods have not been implemented on an industrial scale, leading to inefficiencies and undesirable side reactions.
Innovation Solution
The process combines shockwave technology with electrical preheating to rapidly heat hydrocarbon feedstocks to cracking temperatures without relying on heat transfer from metal surfaces, using renewable or low-carbon electricity sources for energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional direct-fired heaters are used for steam cracking, then cracking temperatures can be achieved, but high levels of greenhouse gas emissions occur due to fossil fuel combustion
Solution Approach 1:
The patent replaces the conventional thermal heating system (furnaces using fossil fuel combustion) with an electrical heating system. Electrically heated reaction tubes or coils are used to heat the hydrocarbon feedstock to cracking temperatures, substituting mechanical/thermal energy conversion through combustion with direct electrical energy conversion, thereby eliminating direct greenhouse gas emissions from the cracking process.
Solution Approach 2:
The patent changes the energy source parameter from fossil fuels to electricity. By using electricity from low-carbon or renewable sources, the process transforms the carbon intensity parameter of the heating system, achieving the same temperature requirement while dramatically reducing greenhouse gas emissions associated with conventional fossil fuel-based heating.
2Object-generated harmful factors
If electrical heating is used for steam cracking, then greenhouse gas emissions are reduced, but heating efficiency and temperature control may be insufficient compared to conventional methods
Solution Approach 1:
The patent applies electrical heating directly to the reaction tubes or coils that contact the hydrocarbon feedstock, creating localized high-temperature zones exactly where needed for cracking. This direct heating approach ensures efficient energy transfer to the process stream, maintaining or improving heating efficiency while using cleaner electricity-based energy 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
This approach significantly reduces greenhouse gas emissions and enhances the yield of valuable products like ethylene and propylene while minimizing coke production, achieving higher temperatures and shorter residence times than conventional methods.
Implementation Method 1
shockwave technology with electrical preheating to rapidly heat hydrocarbon feedstocks to cracking temperatures
Implementation Method 2
achieving higher temperatures and shorter residence times than conventional methods
Implementation Method 3
electrical preheating to rapidly heat hydrocarbon feedstocks
Data Source
AI summary
The present application relates to a process for cracking a hydrocarbon feedstock, using to the largest extent electrically powered equipment where the power is obtained from renewable sources or low-carbon sources. In particular, it relates to a process for cracking a hydrocarbon feedstock, including bringing the hydrocarbon feedstock and dilution steam to supersonic velocities in the reactor, followed by applying a shockwave to induce cracking of the hydrocarbon feedstock, to convert at least a part of the hydrocarbon mixture to produce olefins.