Highly selective and stable Zn–Fe/ZSM-5 catalyst for aromatization of propane

Oseke, G. G.; Atta, A.Y.; Bello, Mustapha Mohammed; Jibril, Baba Y.; Aderemi, B.O.

doi:10.1007/s13203-020-00245-9

Cited by 23 publications

(36 citation statements)

References 43 publications

(67 reference statements)

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“…Regular FTIR, FTIR-pyridine spectra measurement, XRD, BET and textural properties, SEM, TEM, H 2 -TPR and XPS were all used to characterize the catalysts using the same techniques in our previous studies [27][28][35][36]].…”

Section: Catalyst Characterizationmentioning

confidence: 99%

“…Propane aromatization was carried out using the procedures in our previous studies in stainless-steel xed bed reactor with propane (C 3 ) conversion and product selectivity calculated using same equations [27][28][29].…”

Section: Catalytic Activity Testmentioning

confidence: 99%

“…The presence of these characteristic groups showed that nickel co-impregnation with zinc did not destroy HZSM-5 structures [27][28].…”

Section: Catalysts Characterizationmentioning

confidence: 99%

“…Isomorphous substitution of metal in zeolite framework has also been reported to enhance catalytic performance [26]. Bimetallic impregnation of active metal with another as support have also been reported for alkane aromatization, among which are Zn-Fe/ZSM-5 [27], Zn-Cu/ZSM-5 [28], Zn-Co/ZSM-5 and Zn-Ni/ZSM-5 [29], dehydrogenation of propane over Pt-Zn/ZSM-5 [30], methanol transformation over La-Zn/HZSM-5 [31], ethane dehydroaromatization over Ga-Pt/HZSM-5 [32], methane dehydroaromatization over Zn-Mo/ZSM-5 and Fe-Mo/ZSM-5 [33], ethane aromatization over Pt and Pd reinforced Zn-and Mn-ZSM-5 [34] all of which had aided stability and catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

“…% of ZnO from Zn(NO 3 ) 2 99.99% purity Sigma Aldrich analytical grade and 1 to 3 wt. % NiO (Ni(NO 3 ) 2 ) were synthesized using the procedures employed previously [27][28].…”

Section: Introductionmentioning

confidence: 99%

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Synergistic effect of Zn with Ni on ZSM-5 as propane aromatization catalyst: effect of temperature and feed flowrate

et al. 2022

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This work shows how propane was catalytically converted to aromatic compounds over Zn-Ni/HZSM-5 to investigate the synergistic role of nickel as zinc stabilizer and promoter in propane aromatization. Coimpregnation method was employed for Zn-Ni/ZSM-5 synthesis xed 2 wt. % of zinc and 1, 2 and 3 wt. % of nickel. Modi ed catalysts were fully characterized. Catalysts crystallinity, structure and microporosity were retained from analysis results. Propane aromatization process was conducted at 540 o C, 1200 ml/gh gas hourly space velocity and atmospheric pressure. The presence of Ni with Zn improved catalytic performance for all Ni loading. Aromatic selectivity and propane conversion were improved with best performance to be Zn-Ni/ZSM-5 with 2 wt. % Zn, 2 wt. % Ni on ZSM-5 averaging 88 and 60 % for twelve hours' time on stream. Aromatic selectivity on Zn-Ni/ZSM-5 is eight times better than the parent HZSM-5 and one and half times better than the Zn/ZSM-5 catalyst. The electronic interaction of zinc and nickel resulting from equality of oxidation state of +1 and +2 and metal binding energy change synergistically improved the catalytic performance of the bimetallic Zn-Ni/ZSM-5 over the HZSM-5 and Zn/ZSM-5.Flowrate increase from 6 to 35 ml min -1 was found to decrease propane conversion from 80-40 % with increased aromatic selectivity from 55-80 %. Temperature increase from 500-580 o C favours both propane conversion and aromatic selectivity increase from 50-68 and 55-92 % respectively. The metallic interactions from H 2 -TPR and XPS analysis revealed strong improvement on propane conversion, aromatic selectivity and product distribution.

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Section: Catalyst Characterizationmentioning

confidence: 99%

Section: Catalytic Activity Testmentioning

confidence: 99%

“…The presence of these characteristic groups showed that nickel co-impregnation with zinc did not destroy HZSM-5 structures [27][28].…”

Section: Catalysts Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…% of ZnO from Zn(NO 3 ) 2 99.99% purity Sigma Aldrich analytical grade and 1 to 3 wt. % NiO (Ni(NO 3 ) 2 ) were synthesized using the procedures employed previously [27][28].…”

Section: Introductionmentioning

confidence: 99%

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Synergistic effect of Zn with Ni on ZSM-5 as propane aromatization catalyst: effect of temperature and feed flowrate

et al. 2022

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Methanol‐to‐Light Olefins Reaction using Zn‐Ag Modified SSZ‐13 Catalyst

et al. 2022

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The 2 wt.% of Zn and Ag (Zn 1-x -Ag x; x = 0.2, 0.4, 0.6 %) modified SSZ-13 (SZ-13) zeolite was prepared by wet-impregnation method, and its catalytic activity was demonstrated for methanol-to-olefin (MTO). The Zn 0.6 -Ag 0.4 /SZ-13 catalyst exhibited high catalytic activity due to change in properties of catalyst. The Zn particles were highly dispersed inside the SZ-13; while Ag particles were dispersed on the surface of SZ-13, confirmed by HRTEM and surface area. The small % of Ag over SZ-13 promotes ethylene production via aromatization of reaction, and highly dispersed Zn on SZ-13 help to produce stable ethylene and propylene. The Zn 0.6 -Ag 0.4 /SZ-13 catalyst showed (∼ 10 %) higher light olefin (87 %) selectivity than parent SZ-13 as well as mono metal incorporated SZ-13. The higher catalytic activity was attributed due to effect of both metals (Zn and Ag), where Ag promotes partial aromatization on the surface, and Zn increases the Lewis acidity in the zeolite pore. This catalyst can help to improve the selectivity of light olefin using MTO reaction.

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