Selective hydroisomerization of n-dodecane over platinum supported on SAPO-11

Lee, Eun-Ok; Yun, Soyoung; Park, Young-Kwon; Jeong, Soon‐Yong; Han, Jinyu; Jeon, Jong‐Ki

doi:10.1016/j.jiec.2013.06.006

Cited by 36 publications

(26 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be concluded that when the temperature increases the pour point decreases however at moderate temperatures there is a chance for a hydroisomerization reaction to occur, resulting in an isoparaffin formation which has a low pour point (-16 °C at isomerization temperature of 300°C and LHSV 0.5 h -1 ) . This conclusion was supported by Thomas et al, [30] . A comparison for hydroisomerization of lubricating oil using two types of promoters on SAPO-11, the first one Pt/SAPO-11 and the second using Pt Zr W/SAPO-11 shows that Pt Zr W/SAPO-11 gives a lower point (Reducing pour point from -13°C by using Pt/SAPO-11 to -16°C when using Pt Zr W/SAPO-11) which means that the addition of these promoters (0.51% Zr and 1.1% W, which measured by XRF) can enhance the catalyst activity [31].…”

Section: F1 Effect Of Operating Conditions On Pour Pointsupporting

confidence: 62%

See 1 more Smart Citation

Advanced Study of Promoted Pt /SAPO-11 Catalyst for Hydroisomerization of the n-Decane Model and Lube Oil

Al-Jendeel¹,

Hussein

2021

IJCPE

View full text Add to dashboard Cite

SAPO-11 is synthesized from silicoaluminophosphate in the presence of di-n-propylamine as a template. The results show that the sample obtained has good crystallinity, 396m2/g BET surface area, and 0.35 cm3/g pore volume. The hydroisomerization activity of (0.25)Pt (1)Zr (0.5)W/SAPO-11 catalyst was determined using n-decane and base oil. All hydroisomerization experiments of n-decane were achieved at a fixed bed plug flow reactor at a temperature range of 200-275°C and LHSV 0.5-2h-1. The results show that the n-decane conversion increases with increasing temperature and decreasing LHSV, the maximum conversion of 66.7 % was achieved at temperature 275°C and LHSV of 0.5 h-1. Meanwhile, the same catalyst was used to improve base oil specification by increasing viscosity index and decreasing pour point. The isomerization reaction conditions, employed are temperature (200-300)ºC, the liquid hourly space velocity of 0.5-2h-1, and the pressure kept atmospheric. The present study shows that Pt Zr W/SAPO-11 minimizes the pour point of lubricating oil to -16°C at isomerization temperature of 300°C and LHSV of 0.5 h-1 and viscosity index 134.8.

show abstract

Section: F1 Effect Of Operating Conditions On Pour Pointsupporting

confidence: 62%

“…Lee et al [30] found the maximum conversion using Pt W/SAPO-11 was 42% in comparison with our research; it can be seen that the conversion was higher. The reaction rate constants (k) were calculated at different reaction temperatures according to the linear relation between -r A and C A .…”

Section: A Effect Of Temperaturecontrasting

confidence: 49%

Advanced Study of Promoted Pt /SAPO-11 Catalyst for Hydroisomerization of the n-Decane Model and Lube Oil

Al-Jendeel¹,

Hussein

2021

IJCPE

View full text Add to dashboard Cite

show abstract

“…Over Pt-ZSM-35 with a two dimensional channel system, a high conversion was obtained without formation of multibranched products, indicating a pore mouth mechanism. Pt-SAPO-11 has also displayed high selectivity to skeletal isomers in n-dodecane hydroisomerization (Table 1) [33], due to its pore dimensions (Table 2). Platinum was loaded into this catalyst via the incipient wetness method, resulting in a highly reducible Pt located at the external surface of SAPO-11.…”

Section: Structure Of Zeolitesmentioning

confidence: 99%

“…Moreover, a lower reaction temperature is beneficial for maximizing the selectivity towards isomers. Pt catalysts used in hydroisomerization have been supported on H-Beta [9], HY [17], MCM-41 [45], MCM-48 [24], ZSM-12 [12], ZSM-23 [19,23,27], ZSM-22 [19,21,22,27,28,32,35,36], ZSM-35 [19], ZSM-48 [19], intergrown ZSM-22/ZSM-23 [27], IZM-2 [39], sulphated ZrO 2 [50], γ-Al 2 O 3 [51], Pt-γ-Al 2 O 3 -H-Beta [10], SAPO-11 [14,25,33,34], MFI nanosheet [44]. There are only a few publications applying other metals than Pt, such as Pd supported on SiO 2 -Al 2 O 3 [18], Fe-ZSM-22 [29], Ni 2 P-SAPO-11 [26], Ni-SAPO-11 [26], Ni-Mo-SAPO-11 [20], Ni-Cu-SAPO-11 [30].…”

Section: Effect Of Metalmentioning

confidence: 99%

Catalytic Hydroisomerization of Long-Chain Hydrocarbons for the Production of Fuels

et al. 2018

View full text Add to dashboard Cite

Hydroisomerization of long chain paraffins for the production of branched alkanes has recently been intensively studied due to a large availability of these compounds. The most interesting research topics have been the development of novel bifunctional catalysts to maximize the yield of isomers and to suppress the cracking reactions. Since both of these reactions are catalyzed by Brønsted acid sites, the optimum catalyst exhibits equal amounts of metal and acid sites, and it facilitates rapid mass transfer. Thus, several hierarchical and nano-shaped zeolites have been developed, in addition to composite catalysts containing both micro- and mesoporous phases. In addition to catalyst development, the effect of the reactant structure, optimal reaction conditions, catalyst stability and comparison of batch vs continuous operations have been made.

show abstract

“…The peaks among 320–365 °C could be seen as the reduction of platinum in the internal pores. 36 Because of a strong metal-support interaction, the peaks appeared at 424 °C for Pt–NCl and 447 °C for Pt–C reveals that some platinum species in the catalysts are difficult to reduce. 37 Moreover, both Pt–Cl and Pt–N catalysts exhibited large low temperature reduction peaks, indicating that a large number of platinum species were supported on the external surface of the molecular sieves.…”

Section: Resultsmentioning

confidence: 99%

Effect of Metal Precursors on the Performance of Pt/SAPO-11 Catalysts for n-Dodecane Hydroisomerization

et al. 2019

View full text Add to dashboard Cite

Pt(NH 3 ) 4 (NO 3 ) 2 , Pt(NH 3 ) 4 (Ac) 2 , (NH 4 ) 2 PtCl 4 , and H 2 PtCl 6 were used to prepare Pt/SAPO-11 catalysts to investigate the effect of Pt precursors on the hydroisomerization of n -dodecane. The catalyst derived from Pt(NH 3 ) 4 (NO 3 ) 2 displays the best hydroisomerization activity and selectivity among these precursors. The hydroisomerization conversion of n -dodecane is affected by the platinum particle size, platinum dispersion, the location of platinum, and the valence state of platinum. The selectivity of n -dodecane is determined by the number of Brønsted acid sites and Pt crystal planes. These conclusions are verified by combining transmission electron microscopy, high-resolution transmission electron microscopy, hydrogen temperature programmed reduction, NH 3 -temperature programmed desorption, and Py-IR studies. The catalyst prepared with Pt(NH 3 ) 4 (NO 3 ) 2 as the precursor exhibits the smallest platinum particle size and the highest platinum dispersion. Most of the platinum particles are supported on the external surface of SAPO-11 with the Pt(111) crystal face. Such a catalyst also possesses a suitable number of Brønsted acid sites and then displays the best catalytic performance. Obviously, the use of various precursors for the Pt-based catalyst can significantly affect the performance of Pt/SAPO-11 for the hydroisomerization of n -dodecane.

show abstract

Selective hydroisomerization of n-dodecane over platinum supported on SAPO-11

Cited by 36 publications

References 33 publications

Advanced Study of Promoted Pt /SAPO-11 Catalyst for Hydroisomerization of the n-Decane Model and Lube Oil

Advanced Study of Promoted Pt /SAPO-11 Catalyst for Hydroisomerization of the n-Decane Model and Lube Oil

Catalytic Hydroisomerization of Long-Chain Hydrocarbons for the Production of Fuels

Effect of Metal Precursors on the Performance of Pt/SAPO-11 Catalysts for n-Dodecane Hydroisomerization

Contact Info

Product

Resources

About