Zeolite Molded Article Binder Composition for Wear Resistance and Flowability
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Solution Overview
Problem
Existing zeolite molded articles lack sufficient wear resistance and flowability, leading to equipment trouble and prolonged packing and recovery times in adsorption towers.
Innovation Solution
A method involving the use of clay and silica sol as binders, with controlled aerated bulk density and sphericity, to produce a zeolite molded article with enhanced abrasion resistance and flowability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional binders (kaolin clay, bentonite clay, etc.) are used to increase strength, then wear resistance improves, but flowability deteriorates
Solution Approach 1:
The patent changes the chemical composition parameters of the binder system by introducing silica sol with specific particle size distribution (D10: 0.01-0.1 μm, D50: 0.1-1.0 μm, D90: 1.0-10.0 μm) and controlling pH (7-11), which fundamentally alters the binding mechanism to achieve both wear resistance and flowability
Solution Approach 2:
The patent creates a composite binder system combining clay (30-70 parts by weight) with silica sol (30-70 parts by weight) and water-soluble sodium salt (1-10 parts by weight), where the synergistic interaction between components produces a binder that maintains particle integrity while enabling smooth flow
2Reliability
If more binder is added to improve strength, then wear resistance improves, but packing time increases
Solution Approach 1:
The patent optimizes the binder composition parameters to achieve maximum binding efficiency at lower concentrations, with silica sol forming a gel structure that binds particles together while maintaining flowability, reducing required binder content and thus packing time
3Volume of stationary object
If the zeolite molded article is made more compact to improve density, then aerated bulk density improves, but wear resistance deteriorates
Solution Approach 1:
The patent changes the physical state of the binder system through pH control (7-11) and silica sol gel formation, creating a binder that provides structural support for wear resistance while maintaining particle looseness for high aerated bulk density
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 resulting zeolite molded article exhibits high wear resistance and flowability, preventing pressure loss and facilitating efficient packing and recovery in adsorption towers.
Implementation Method 1
5 parts by weight or more and 40 parts by weight or less of a silica sol
Implementation Method 2
it has a framework comprising silicon dioxide resistant to heat, and is thereby capable of adsorbing and desorbing VOCs
Implementation Method 3
0.5 parts by weight or more and 10 parts by weight or less of a water-soluble sodium salt
Implementation Method 4
capable of adsorbing and desorbing VOCs at high temperature
Implementation Method 5
capable of adsorbing and desorbing VOCs at high temperature
Data Source
AI summary
A zeolite molded article includes 100 parts by weight of zeolite, 35 parts by weight or more and 70 parts by weight or less of clay, 5 parts by weight or more and 40 parts by weight or less of a silica sol and 0.5 parts by weight or more and 10 parts by weight or less of a water-soluble sodium salt, having an abrasion resistance of 90% or more, an angle of repose of 40° or less, an aerated bulk density on the surface of the zeolite molded article of 0.5 kg/L or more, and a sphericity of the zeolite molded article of 1 or more and 3 or less. The zeolite contains at least one type of zeolite having Si/Al2 of 10 or more and 100,000 or less and a moisture adsorption amount of 10 (g/100 g) or less at 25° C. under a relative pressure of 0.5.