Nitrogenmuevek Co., Petfuerdoe, Hungary connected a new Feed Gas Saturating Process to its M. W. Kellogg made ammonia plant during the summer maintenance period in 2003. From the former natural gas preheat coil, in the convection section, high amounts of sulphur moved into the primary reformer catalyst, and later on to the downstream reactors as well. At the same time relatively high CO_2 level in the natural gas feed decreased the pH level in the saturating process causing excessive corrosion. In this paper we introduce how we managed the sulphur poisoning of the catalysts and the acidity problem without interrupting of continuous operation until the next year's general turnaround.
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