Kinetics and reactor modeling of the conversion of <i>n</i>-pentane using HZSM-5 catalysts with different Si/Al ratios

Cordero-Lanzac, Tomás; Aguayo, Andrés T.; Castaño, Pedro; Bilbao, Javier

doi:10.1039/c9re00222g

Cited by 14 publications

(8 citation statements)

References 49 publications

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“…At the studied conditions, olefins are the main products but significant yields of C 5+ hydrocarbons (nonaromatics) are also predicted. In a previous work, the valorization of these byproducts were studied by the catalytic cracking of n -pentane as the model compound . This constitutes a possibility for the intensification of olefin production in a secondary process.…”

Section: Resultsmentioning

confidence: 99%

“…In a previous work, the valorization of these byproducts were studied by the catalytic cracking of n-pentane as the model compound. 46 This constitutes a possibility for the intensification of olefin production in a secondary process. Several simulations of the reactor−regenerator system using the CZ140 catalyst were performed in a wider range of operating conditions in order to provide an operation map of the yields of these two lumps.…”

Section: Resultsmentioning

confidence: 99%

“…had Si/Al ratios of 15 and 140 and were agglomerated with pseudoboehmite (Sasol) as a binder following the procedure detailed in our previous work. 46 The final catalyst consists of 50 wt% of a zeolite, 30 wt% of the mesoporous γ-Al 2 O 3 formed from the binder, and 20 wt% of α-Al 2 O 3 (Alfa Aesar) as the inert filler. The nomenclature of the catalysts is based on the Si/Al ratio of the zeolite: CZ15 and CZ140.…”

Section: Methodsmentioning

confidence: 99%

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Reactor–Regenerator System for the Dimethyl Ether-to-Olefins Process over HZSM-5 Catalysts: Conceptual Development and Analysis of the Process Variables

Cordero-Lanzac

Aguayo

Bilbao

2020

Ind. Eng. Chem. Res.

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The dimethyl ether (DME)-to-olefins (DTO) process is an interesting alternative to the methanol-to-olefins process because of the easier production of DME, its higher reactivity, and the moderate deactivation exhibited by HZSM-5 catalysts. A design of the reactor−regenerator system has been developed for the prospective implementation of the DTO process using the kinetic models of two catalysts based on zeolites with different acidities (Si/Al ratios of 15 and 140). These kinetic models have been obtained from DTO experimental runs carried out in a packed bed reactor at 325−400 °C, up to 6.5 g h mol C−1 and 15 h on stream. The reactor−regenerator model considers the activity distribution function of the catalyst in both fluidized bed units by applying the population balance theory. The influence of process variables (space time, temperature, reactant dilution in water or N 2 , catalyst acidity, and mean residence time of the catalyst) on the activity distribution function, conversion, and selectivity to products, mainly olefins, has been studied.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Reactor–Regenerator System for the Dimethyl Ether-to-Olefins Process over HZSM-5 Catalysts: Conceptual Development and Analysis of the Process Variables

Cordero-Lanzac

Aguayo

Bilbao

2020

Ind. Eng. Chem. Res.

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“…[17] Cordero-Lanzac et al found ideal conditions using kinetics and reactor modeling for the catalytic transformation of n-C5 (550°C and 3.5 g-cat h mol À 1 ) in maximizing BTX yield and selectivity (yield and selectivity of 53 %) over ZSM-5 (Si/Al 2 = 30). [18] Wannapakdee et al researched n-pentane aromatization with conversion 40 % and BTEX selectivity 45 %, using HZSM-5 nanosheets improved with Ga. [19] Experimental and density functional theory (DFT) data also confirmed the behavior of the hierarchical Ga incorporated zeolite nanosheets.…”

Section: Introductionmentioning

confidence: 96%

Light Paraffinic Naphtha to BTX Aromatics over Metal‐Modified Pt/ZSM‐5

et al. 2020

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We investigated the conversion of light paraffinic naphtha (C5-C6) into BTX (benzene, toluene, and xylenes) aromatics using 1.0 wt % Pt-M/ZSM-5 (modifier M = 1 wt% Zn, 2 wt % of Fe, La, Ga) prepared using wet-impregnation method. The effects of Pt and modifier on light naphtha conversion, yield and aromatic selectivity (benzene, toluene, xylene, C9 + aromatics) were studied in fixed-bed flow reactor in atmospheric pressure, at 550°C, and WHSV 1.0 h À 1. Catalytic efficiency of modified Pt or Pt-M ZSM-5 catalysts has been equated to conventional ZSM-5 [Si/Al 2 = 30] catalyst. While the yield of total aromatics was slightly increased over Pt/ZSM-5 comparison to parent ZSM-5 from 32 wt % to 37 wt %, the value for in situ formed mesoporous Pt-Ga/ZSM-5 was significantly improved reaching 60 wt %. The higher selectivity to aromatics is attributed to the induced mesoporous volumes and dehydrogenation activity of Ga species. These species associated with Pt were effective in the conversion of light naphtha to olefins, which later converted into aromatics by secondary reactions: cracking, isomerization and dimerization. The Pt-Ga/ZSM-5 showed good stability toward the selective production of aromatics at a low toluene/benzene ratio ∼ 0.5 due to Pt component.

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“…Parafinen interes komertziala mugatua da, erreaktibotasun eta oktano-indize txikia dutelako. Gaur egun, C 4 -C 7 parafinen cracking katalitikoa ikertzen ari da, olefinak selektiboki lortzeko prozesu espezifikoa garatzeko asmoz [45].…”

Section: Beste Prozesuakunclassified

Olefina arinen ekoizpena: egungo egoera eta aurreikuspenak

Epelde

Tabernilla

Iriarte

et al. 2021

EKAIA

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Olefina arinak (bereziki, etilenoa eta propilenoa) industria petrokimikoko oinarrizko lehengaiak dira eta poliolefinak (polietilenoa eta polipropilenoa) ekoizteko erabiltzen dira nagusiki. Gaur egun, olefinen eskaria handitzen doa, etilenoaren eskariak % 3-5 urteko igoera aurkeztuz, eta propilenoak aldiz, % 5-7koa. Etilenoaren eskaria bermatuta dago etanoaren ur-lurrun bidezko cracking termiko (SC) prozesuaren bitartez, baina propilenoaren eskaria betetzeko, ohiko prozesuek (SC eta cracking katalitikoa ohantze fluidizatuan (FCC)) eskaintzen duten hautakortasuna hobetu beharra dago. Gainera, industria mailan ezarritako teknologiek erregai fosilen menpekotasun eta energia kontsumo handia dute. Beraz, ohiko teknologiak hobetzea eta iturri berriztagarriak erabiltzen dituzten prozesuak garatzea dira gaur egungo findegiaren eta industria petrokimikoaren erronka nagusienak. Lan honetan, lehendabizi olefina arinen erabilerak eta hauen eskaria mundu mailan aztertzen dira. Jarraian ohiko teknologiak deskribatzen dira (iturri fosiletik abiatuz) eta azkenik, bestelako teknologia berriztagarriak aurkezten dira, biomasaren eta hondakinen balorizazioan oinarritzen direnak.

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Kinetics and reactor modeling of the conversion of n-pentane using HZSM-5 catalysts with different Si/Al ratios

Abstract: The production of olefins and aromatics from n-pentane using two ZSM-5 catalysts is faithfully predicted by a versatile kinetic model.

Cited by 14 publications

References 49 publications

Reactor–Regenerator System for the Dimethyl Ether-to-Olefins Process over HZSM-5 Catalysts: Conceptual Development and Analysis of the Process Variables

Reactor–Regenerator System for the Dimethyl Ether-to-Olefins Process over HZSM-5 Catalysts: Conceptual Development and Analysis of the Process Variables

Light Paraffinic Naphtha to BTX Aromatics over Metal‐Modified Pt/ZSM‐5

Olefina arinen ekoizpena: egungo egoera eta aurreikuspenak

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