Why honeycomb zeolite molecular sieves have a longer lifespan than activated carbon？

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The main reasons why honeycomb zeolite molecular sieves have a longer lifespan than activated carbon are as follows:

1. **Structural Stability**
Zeolite molecular sieves possess a regular crystal structure composed of silicon-oxygen tetrahedra and aluminum-oxygen tetrahedra. This structure exhibits high stability under high temperatures and chemical environments and is not easily destroyed.

2. **Thermal Stability**
Zeolite molecular sieves can withstand higher temperatures and usually remain structurally intact above 600°C, while activated carbon is prone to oxidation or decomposition at high temperatures.

3. **Chemical Stability**
Zeolite molecular sieves have strong resistance to acids, bases and other chemical substances and are less likely to undergo chemical reactions; activated carbon, however, is prone to corrosion by strong acids and bases, leading to a decline in performance.

4. **Regeneration Capacity**
Zeolite molecular sieves can be regenerated through methods such as heating or vacuuming, and their performance declines minimally after multiple uses; although activated carbon can also be regenerated, the number of regenerations is limited, and its performance decreases each time it is regenerated.

5. Selective Adsorption
Zeolite molecular sieves have uniform pore sizes, which can selectively adsorb molecules of specific sizes, reducing the situation where impurities clog the pores; activated carbon has a wider pore size distribution, easily adsorbing various molecules, leading to pore blockage and affecting its lifespan.

6. **Mechanical Strength**

Zeolite molecular sieves have relatively high mechanical strength and are not prone to wear or breakage; in contrast, activated carbon is more fragile and is easily damaged by mechanical forces.