Acidity plays the most important role for the catalyzed chemical sunfo mesocacbon away from the biomass contains carbohydrates. From the proof brought the group success-SO3H on the structure of black powder can also predict the acidity of catalyst increased much. Black powder and acidity of catalyst was determined according to the method of the TPD-NH3. Acidity of samples measured by the method of ammonia adsorption temperature program TPD-NH3.
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