Predicting Catalytic Performance of Micro-Mesoporous Pt/Beta-KIT-6 Catalyst in n-Heptane Hydroisomerization Using Indexed Isomerization Factor and Experimental Verification

Abstract

A Beta-KIT-6 (BK) micro-mesoporous composite material was assembled using zeolite Beta seed solution as raw material. BK composite contained both zeolite Beta units and three-dimensional cubic Ia3d mesostructure of KIT-6, which served as a catalyst support for hydroisomerization of n-heptane. The composite was characterized by a variety of techniques. Results show that catalyst Pt/HBK using the composite as the support exhibited the highest isoheptanes yield among all catalysts, which is attributed to both appropriate surface acidity and excellent mass transfer properties of Beta-KIT-6 composite. Experimental results verified that the indexed isomerization factor as a general performance descriptor could accurately predict the hydroisomerization performance of support materials.

Synthesis of mesoporous Pt@KIT−6/SAPO−11 VIA in situ encapsulation to catalyze the decarboxylation of oleic acid to C8–C17 alkanes

“…These images establish that the pore arrangement of the 0.8Pt@KIT−6 /SAPO−11 − 0.4 was more regular and that this material had an orderly strip−shaped pore structure. Standard KIT−6 molecular sieves contain ordered strip−shaped channels along the direction perpendicular to the channels and cubic three−dimensional pore structures can be observed along the direction of the pores 29 . In this work, the appearance of orderly strip−shaped pore structures in the prepared catalyst indicated that part of the undamaged structure of KIT−6 molecular sieve micron−sized fragments existed in the catalyst.…”

“…Standard KIT−6 molecular sieves contain ordered strip−shaped channels along the direction perpendicular to the channels and cubic three−dimensional pore structures can be observed along the direction of the pores. 29 In this work, the appearance of orderly strip−shaped pore structures in the prepared catalyst indicated that part of the undamaged structure of KIT−6 molecular sieve micron−sized fragments existed in the catalyst. The particle size distribution data demonstrate that the Pt nanoparticles on all three catalysts were well dispersed and that the average Pt particle size was in the range of 5.2-5.7 nm.…”

“…26 These materials have therefore been widely used in catalysis, adsorption, and other fields. 27,28 Gao et al 29 investigated the catalytic performance of Pt − based catalysts synthesized with Beta, KIT−6, and a Beta−KIT−6 (BK) composite as supports when applied to the isomerization of n − heptane, and the Pt/HBK was found to show greater catalytic activity. At a temperature of 240 °C, a mass space velocity of www.soci.org X Liu et al…”

Promotional Effect of Pd Addition on the Catalytic Activity of Composite Pt-Pd/AlSBA-15–β Catalyst for Enhanced n-Heptane Hydroisomerization

“…The MoBC 7 fraction includes 2methylhexane (2-MeC 6 ), 3-methylhexane (3-MeC 6 ), and 3-ethylpentane (3-EtC 5 ). 3-MeC 6 is slightly favoured against 2-MeC 6 (see 2-MeC 6 /3-MeC 6 ratio), especially with the composite catalysts, which can be recognized as the weaker diffusion restriction [72,73]. The results (Table 3) have revealed that among the Pt composite catalysts, the Pt/SBA-BEA shows the highest efficiency in iso-C 7 products with relatively high contribution of MuBC 7 .…”

Mesoporosity and Acidity Manipulation in ZSM‐23 and their n‐Hexadecane Hydroisomerization Performance

“…This method is widely used because of its low cost and simple operation process [19] . Some researchers have processed mordenite, [16a] ZSM‐5, [20] Beta [21] and other zeolites to prepare micro‐meso materials and tested their catalyst performances. Compared with the samples without treatment, the treated ones performed better.…”