ETS-10 Titano Silicate Adsorbent High Pressure Ethane Separation
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Solution Overview
Problem
Current methods for separating ethane from methane in natural gas streams, such as absorptive and cryogenic processes, are inefficient and costly, with existing adsorptive materials like molecular sieves and zeolites showing limited selectivity and performance at high pressures.
Innovation Solution
Employing ETS-10 type titanosilicate materials, which can be modified cationically or structurally, to selectively adsorb ethane over methane at pressures of 200 psia or higher, utilizing a swing adsorption process to separate ethane and C3+ paraffins from methane-rich streams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cryogenic separation methods are used to remove ethane from natural gas, then ethane recovery efficiency is improved (90% or more), but energy consumption increases significantly due to cooling requirements
Solution Approach 1:
The patent replaces the mechanical cryogenic cooling system with an adsorption-based separation system using ETS-10 titanosilicate materials. The adsorption process operates at ambient or elevated temperatures, eliminating the need for energy-intensive cooling equipment while achieving comparable or superior ethane separation efficiency.
Solution Approach 2:
The invention changes the operating temperature parameter from cryogenic conditions (below -120°F) to ambient or elevated temperatures. This parameter change fundamentally alters the separation mechanism from condensation-based to adsorption-based, dramatically reducing energy consumption while maintaining high ethane recovery rates.
2Ease of operation
If absorptive separation methods are used to remove ethane from natural gas, then operation simplicity is improved, but ethane recovery efficiency deteriorates (only 75-85% of ethane can be recovered)
Solution Approach 1:
The patent employs ETS-10 titanosilicate, a porous material with specific pore size and surface chemistry that enables selective adsorption of ethane. The material's porous structure provides high surface area for adsorption while maintaining ease of operation through simple contact with the gas stream, achieving both operational simplicity and high recovery efficiency.
Solution Approach 2:
The invention uses composite ETS-10 titanosilicate materials that combine the advantages of molecular sieves (selectivity) with zeolite-like properties (capacity and ease of operation). This composite approach enables high ethane recovery while maintaining simple operational procedures.
3Manufacturing precision
If molecular sieves are used to adsorb ethane from natural gas, then ethane selectivity is improved, but methane co-adsorption increases which limits process efficiency
Solution Approach 1:
The patent applies local quality by modifying specific regions of the ETS-10 material's pore structure and surface chemistry to create selective adsorption sites. The material's framework contains specific titanium-oxygen clusters and pore entrance regions that are locally optimized to accommodate ethane molecules while excluding methane, achieving high selectivity without significant methane co-adsorption.
4Use of energy by moving object
If adsorption methods are used to separate ethane from natural gas at high pressure, then energy consumption is reduced, but existing adsorptive materials show limited selectivity and performance at these pressures
Solution Approach 1:
The patent changes the material's structural parameters (pore size, surface area, functional groups) and operating parameters (pressure, temperature) to optimize adsorption performance at high pressures. The ETS-10 material's framework structure is specifically designed to maintain or enhance selectivity under high-pressure conditions typical of natural gas processing.
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 ETS-10 materials demonstrate improved ethane/methane selectivity at high pressures, increasing with pressure, enabling efficient separation of ethane and C3+ paraffins, potentially replacing traditional high-cost cryogenic separation methods and enhancing the ethane derivatives industry.
Implementation Method 1
employing ETS-10 type titanosilicate materials, which can be modified cationically or structurally, to selectively adsorb ethane over methane at pressures of 200 psia or higher
Implementation Method 2
utilizing a swing adsorption process to separate ethane and C3+ paraffins from methane-rich streams
Data Source
AI summary
ETS-10 type materials preferentially adsorb ethane and, if present, C3+ paraffins from mixtures comprising methane, ethane and optionally C3+ paraffins at pressures above 200 psia. A process in which ETS-10 type materials are used to separate ethane and C3+ paraffins from natural gas streams at over 200 psia is provided.