Titanium Organotitanate Filter for Selective Siloxane Removal
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Solution Overview
Problem
Existing gas sensors and filter materials are ineffective in selectively removing siloxanes from gas streams, leading to sensor toxification and reduced sensitivity, especially for alkanes like propane and butane, and result in costly and energy-intensive methods or loss of other gas components.
Innovation Solution
A filter material containing titanium compounds, such as organotitanates and their hydrolysis derivatives, is used for selective siloxane removal, which are applied to a carrier like a glass fiber mat, allowing for high affinity and selectivity without affecting other gas components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional adsorbers (silica gel, aluminum oxide, zeolites, activated carbons) are used to remove siloxanes, then siloxane removal is achieved, but other gas components are also absorbed leading to loss of industrially exploitable gas components and adulteration of gas samples
Solution Approach 1:
The invention changes the chemical parameter of the filter material by using titanium compounds (organotitanates and their hydrolysis derivatives) instead of conventional adsorbers. This chemical parameter change enables selective interaction with siloxanes through specific chemical affinity, allowing siloxane removal while preserving other gas components like alkanes.
Solution Approach 2:
The invention employs a composite filter material consisting of titanium compounds supported on a carrier structure. This composite approach combines the high siloxane affinity of titanium compounds with the structural properties of the carrier, achieving selective siloxane removal without the non-selective adsorption problems of conventional single-material adsorbers.
2Reliability
If condensation at -25°C is used to remove siloxanes, then siloxane removal is achieved, but the method requires great deal of energy for cooling and is technically complicated
Solution Approach 1:
The invention replaces the mechanical/physical cooling system (requiring -25°C temperature control) with a chemical absorption system based on titanium compounds. This substitution eliminates the need for complex cooling infrastructure and high energy consumption while achieving effective siloxane removal at ambient or near-ambient temperatures.
Solution Approach 2:
The invention changes the operating temperature parameter from -25°C (condensation method) to ambient or near-ambient temperatures (filter material method). This parameter change dramatically reduces energy consumption and technical complexity while maintaining siloxane removal effectiveness through chemical affinity rather than physical condensation.
3Reliability
If siloxanes are present in gas atmosphere to be analyzed, then silicon dioxide forms and deposits on gas-sensitive layer, but the sensitivity of gas sensor is reduced (sensor toxification)
Solution Approach 1:
The invention introduces a titanium compound filter material as an intermediary between the siloxane-containing gas and the gas sensor. This intermediary selectively captures siloxanes through chemical affinity, preventing them from reaching and toxifying the sensor while allowing other analyte gases to pass through to the sensor for accurate measurement.
4Reliability
If filter material with high siloxane affinity is used, then siloxane removal is improved, but response time for alkanes may be prolonged
Solution Approach 1:
The invention applies local quality by creating a filter material where titanium compounds are distributed on a carrier structure, providing localized siloxane capture sites while maintaining open pathways for gas flow. This local concentration of affinity sites achieves high siloxane removal without creating a dense barrier that would slow down the passage of alkane gases to the sensor.
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 filter material effectively protects gas sensors from siloxane-induced toxification while maintaining sensitivity and response time for alkanes, preventing silicon dioxide deposition and ensuring reliable gas detection even in siloxane-containing environments.
Implementation Method 1
the filter material contains a titanium compound, which is an organotitanate and/or a compound, which can be obtained by hydrolysis of an organotitanate
Data Source
AI summary
A filter material is for the selective removal of siloxanes from a gas. The filter material contains a titanium compound, which is an organotitanate and/or a compound, which can be obtained by hydrolysis of an organotitanate. A method for the production of the filter material is also provided to use the filter material for the selective removal of siloxanes from a gas. A gas sensor is provided which includes the filter material.