Why does my ammonia TPD (NH3-TPD, NH3TPD) graph on HZSM-5 samples is fluctuating (noise) aggressively?

I obtained a result to investigate the acid sites of HZSM-5 via ammonia-TPD; but it did not turn out what I expected from other journals. What may be the root cause of this problem?

27 October 2022 9,338 1 View