Development of a Numerical Model to Predict the Impact of Phosphorus on Flow through Aftertreatment Components

Chavannavar, Praveen

doi:10.4271/2012-01-1299

Cited by 1 publication

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“…Hydrothermal Stability. To meet practical phosphorus levels (0−0.468 wt %) in diesel vehicle exhausts 36 and reveal the regenerative effect, Cu-SSZ-13 catalysts with 0.3 mmol/g catal (0.96 wt %) phosphorus loadings are mainly explored in the following study. To evaluate the influence of phosphorus poisoning and regeneration on the hydrothermal stability of Cu-SSZ-13, Cu-F, Cu-0.3P, and Cu-0.3P-Ry (y = 1, 2, and 3), they were hydrothermally aged at 800 °C for 12 h, and then their activities were evaluated under SCR conditions.…”

Section: Resultsmentioning

confidence: 99%

Efficient Strategy to Regenerate Phosphorus-Poisoned Cu-SSZ-13 Catalysts for the NH₃-SCR of NO_x: The Deactivation and Promotion Mechanism of Phosphorus

et al. 2021

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Despite the successful commercialization of Cu-SSZ-13 catalysts as efficient ammonia-selective catalytic reduction (NH3-SCR) catalysts in diesel vehicles for NO x elimination, their sensitivity toward phosphorus poisoning is one of the primary challenges to practical applications. In this study, an efficient method was used to regenerate a phosphorus-poisoned Cu-SSZ-13 catalyst by washing with hot water. The mechanism of deactivation and regeneration of the Cu-SSZ-13 catalyst was deeply investigated by a series of careful characterizations of fresh, poisoned, and regenerated catalysts. After regeneration, the recovery of the decreased accessibility and porosity, deactivated Brønsted acid sites, and Cu2+ ions resulted in the restoration of the decreased activity and hydrothermal stability of the poisoned Cu-SSZ-13. At a low phosphorus loading (0.2 mmol/gcatal, 0.54 wt %), the promotion effect of phosphorus on the SCR performance was observed after regeneration, which was attributed to the decrease in the content of CuO species and recovery of the acid sites and active Cu2+ ions after regeneration. Additionally, the combination of washing with hot water and hydrothermal aging results in good recovery of the SCR performance of the phosphorus-poisoned catalyst. This work focuses on the regeneration of a phosphorus-poisoned Cu-SSZ-13 catalyst, which provides an efficient method to prolong the lifespan of the Cu-SSZ-13 catalyst in practical applications.

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Section: Resultsmentioning

confidence: 99%

Efficient Strategy to Regenerate Phosphorus-Poisoned Cu-SSZ-13 Catalysts for the NH₃-SCR of NO_x: The Deactivation and Promotion Mechanism of Phosphorus

et al. 2021

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show abstract

Development of a Numerical Model to Predict the Impact of Phosphorus on Flow through Aftertreatment Components

Cited by 1 publication

References 12 publications

Efficient Strategy to Regenerate Phosphorus-Poisoned Cu-SSZ-13 Catalysts for the NH₃-SCR of NO_x: The Deactivation and Promotion Mechanism of Phosphorus

Efficient Strategy to Regenerate Phosphorus-Poisoned Cu-SSZ-13 Catalysts for the NH₃-SCR of NO_x: The Deactivation and Promotion Mechanism of Phosphorus

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Development of a Numerical Model to Predict the Impact of Phosphorus on Flow through Aftertreatment Components

Cited by 1 publication

References 12 publications

Efficient Strategy to Regenerate Phosphorus-Poisoned Cu-SSZ-13 Catalysts for the NH3-SCR of NOx: The Deactivation and Promotion Mechanism of Phosphorus

Efficient Strategy to Regenerate Phosphorus-Poisoned Cu-SSZ-13 Catalysts for the NH3-SCR of NOx: The Deactivation and Promotion Mechanism of Phosphorus

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Efficient Strategy to Regenerate Phosphorus-Poisoned Cu-SSZ-13 Catalysts for the NH₃-SCR of NO_x: The Deactivation and Promotion Mechanism of Phosphorus

Efficient Strategy to Regenerate Phosphorus-Poisoned Cu-SSZ-13 Catalysts for the NH₃-SCR of NO_x: The Deactivation and Promotion Mechanism of Phosphorus