Improvement of hydrothermal stability of Pt/SAPO-11 catalyst in hydrodeoxygenation–isomerization–aromatization of vegetable oil

Promotional Effect of WOxin Pt-WOx/AlPO4-5 Catalyzed Deoxygenation of Fatty Acids

“…Even in those studies loss in catalytic activity was observed (Supporting Information; S8). Such hydrothermal instability was observed also for SAPO‐11 catalysts . Hydrolysis of Si‐O(PO 3 )‐Al bonds and leaching of silica was reported in those catalysts.…”

“…However, zeolite loses its structural integrity during the hydrotreatment of vegetable oils due to hydrolysis of Si‐O−Al or Si‐(PO 4 )‐Al bonds and thereby, the loss in acidity . There have been efforts to improve the stability of zeolite catalysts …”

“…WO x can act as a structural and electronic modifier to Pt and thereby, influence its catalyst performance. The instability of SAPO‐n structure in hydrodeoxygenation reactions at higher temperatures (330‐350 °C) has been assigned to hydrolysis of Si‐O(PO 3 )‐Al bond, desilication and formation of AlPO 4 ‐n‐like phase . Most of the earlier studies on SAPOs were conducted using fatty acid esters but not with fatty acids.…”

Effect of the Structure and Mesoporosity in Ni/Zeolite Catalysts for n‐Hexadecane Hydroisomerisation and Hydrocracking

“…[4][5][6][7][8][9] Similarly,t he production of biofuelsf rom vegetable/algalo ils via catalytic deoxygenation/hydrogenation yields long linear hydrocarbons that require furtheru pgrading by isomerization processes. [10,11] There are, however,v arious other relevant type of applications, such as the production of fuels from plastics, [12] or the hydroconversion of thermalc racking waxes obtained from pyrolysis of polyolefin, [13] along with more classical uses,such as in hydroprocessing of hydrocracker bottom. [14] Typically,t hesec atalysts are based on noble metals/zeolite bifunctional catalysts.…”

Synthesis of 2,6-Dimethylnaphthalene Over Sapo-11, Sapo-5 and Mordenite Molecular Sieves

“…Among these molecular sieves, SAPO-11 molecular sieve has been proved to show high catalytic performances in the methylation of naphthalene with methanol (Liu et al, 2013;Wang et al, 2012;Wang et al, 2013;. First of all, SAPO-11 is a one-dimensional pore zeolite with pore opening of 0.39 nm × 0.64 nm Zhang et al, 2007), which is between the pore size of large-pore molecular sieves and the pore size of medium-pore molecular sieves, making it an interesting material for catalytic cracking, reforming and alkylation (Subramanian et al, 1997;Prakash et al, 1996;Han et al, 2014;Liu et al, 1991;Rabaev et al, 2015;Tian et al, 2014;. Similar to ZSM-12, SAPO-11 also possesses one dimensional and non-intersecting channels (Zhang et al, 2010), which shows excellent resistance to deactivation by carbonaceous deposition.…”