Study of the benzylation of aromatics over Mg-Cr-hydrotalcite catalysts

Tahir, N.; Abdelssadek, Z.; Halliche, D.; Saadi, Abdelkrim; Cherifi, O.; Bachari, Khaldoun

doi:10.1016/s0167-2991(08)80124-3

Cited by 4 publications

(1 citation statement)

References 10 publications

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“…Studies have performed on improving the performance of hydrotalcite-based LNT catalysts through replacement of M II by Cu 2+ , Co 2+ , Mn 2+ , Ni 2+ [12][13][14][15], substitution of M III with other cations such as Fe or Cr [16,17] and even alteration of both M II and M III simultaneously [18][19][20]. These studies paid more attention on the impact of material modification on the catalytic performance of the LNT system, but rarely focused on the slurry properties.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Washcoat Slurry for Hydrotalcite-Based LNT Catalyst

Zhu

Chen

et al. 2019

Catalysts

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This work aimed to optimize the washcoat slurry for hydrotalcite-based lean NOx trap (LNT) catalyst. The effects of the slurry properties including pH, solid content, binder and additive on the hydrotalcite-based slurry viscosity were investigated. The particle size distribution of the optimal hydrotalcite-based slurry was measured. A cordierite material was used to coat the optimal slurry, and the washcoat was characterized by X-ray diffraction, scanning electron microscopy and N2 adsorption. The optimal slurry containing Pt and Ba was coated on the cordierite for the preparation of hydrotalcite-based LNT catalyst, and the performances of this catalyst were evaluated by NOx storage test, temperature programmed desorption and NOx reduction. For comparison, the performance of the commercial LNT catalyst with Pt/BaO/Al2O3 was analyzed. After coating, the hydrotalcite-based washcoat was closely contacted with the support, being the main phase MgO and presenting a specific surface area of 86.3 m2/g. The hydrotalcite-based LNT catalyst had better NOx storage and desorption ability, selectivity to N2 and LNT efficiency than the Pt/BaO/Al2O3 catalyst.

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