August 2022

Catalysts

Case study: SCR catalyst plugging

Hydrogen (H2) reforming is a process to produce H2 from a compound composed of H2 atoms. A convection pass is used to heat the process during reforming, which creates nitrogen oxides (NOx). The NOx-rich flue gas passes through a selective catalytic reduction (SCR) reactor before being exhausted into the atmosphere.

Kline, A., IGS Environmental

Hydrogen (H2) reforming is a process to produce H2 from a compound composed of H2 atoms. A convection pass is used to heat the process during reforming, which creates nitrogen oxides (NOx). The NOx-rich flue gas passes through a selective catalytic reduction (SCR) reactor before being exhausted into the atmosphere. Lint-like fibers from the convection pass and refractory liners create an obstruction that builds up and fouls the face of the SCR catalyst (FIG. 1). FIG. 1. Typical buildup and fouling of a reformer SCR catalyst face. The result is decreased NOx reduction. The higher pressure drops across the catalyst and ultimately reduces H2 outpu

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