The acid proper-ties of its coking in front and behind by temperature programmed desorption of ammonia(TPD).
用氨程序升温脱附法（TPD）研究了它们在积炭前后的酸性变化。
The catalyst is characterized by temperature programmed reduction (TPR), H_2 chemisorption and ammonia temperature programmed desorption (NH3-TPD).
采用程序升温还原(TPR)、氢的化学吸附和NH_3的程序升温脱附(NH3 - TPD)对催化剂进行了表征。
HMCM-22 zeolite was modified with ammonium hexafluorosilicate and characterized by temperature-programmed desorption of ammonia and pyridine adsorption infrared spectroscopy.
用氟硅酸铵对HMCM-22分子筛进行了改性处理，并采用氨程序升温脱附和吡啶吸附红外光谱法测定了其酸性。
HMCM-22 zeolite was modified with ammonium hexafluorosilicate and characterized by temperature-programmed desorption of ammonia and pyridine adsorption infrared spectroscopy.
用氟硅酸铵对HMCM-22分子筛进行了改性处理，并采用氨程序升温脱附和吡啶吸附红外光谱法测定了其酸性。
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