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zhutuetit

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550 or 600 oC are usually the applied

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The only reason is that your template is not removed completely and part of that is converted to coke, or carboneous species. TGA can show you that some template can only be removed when the temparature is higher than 700oC. However, most of the zeolites, except a few, would suffer from dealumination, or even worse, the collapse of the framework. Long time of combution might be helpful, but can not guarntee to calcine all the coke.
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louis.troy

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numbernine

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shanzhichao1982

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