Realization of active species in potassium catalysts on zeolite NaY prepared by ultrasound-assisted impregnation with acetate buffer and improved performance in transesterification of palm oil

Rakmae, Suriyan; Keawkumay, Chalermpan; Osakoo, Nattawut; Montalbo, Kathrina D.; Leon, Rizalinda L. de; Kidkhunthod, Pinit; Chanlek, Narong; Roessner, F.; Prayoonpokarach, Sanchai; Wittayakun, Jatuporn

doi:10.1016/j.fuel.2016.07.035

Cited by 21 publications

(26 citation statements)

References 24 publications

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“…The decrease could be from the occupation of the impregnated species in the zeolite cavities, blockage of the zeolite pores, and the collapse of the zeolite structure. 12 K/NaX shows a smaller decrease in the adsorbed volume than K/NaY. The results imply that K/NaX has less potassium species in the zeolite cavities or less pore blocking.…”

Section: Resultsmentioning

confidence: 82%

“… 12 , 13 , 17 − 19 The catalysts are prepared commonly by impregnation with potassium hydroxide (KOH), potassium nitrate (KNO 3 ), and potassium acetate buffer (CH 3 COOK/CH 3 COOH). 12 , 13 , 17 − 22 The basicity increases with potassium loading, resulting in better biodiesel yields. Some of those catalysts have problems from the collapse of the zeolite structure or the agglomeration of potassium species.…”

Section: Introductionmentioning

confidence: 99%

“… 24 There are a few reports on ultrasound-assisted impregnation of metal precursors on FAU zeolite. 12 , 25 Rakmae et al used ultrasound-assisted impregnation to prepare 12 wt % potassium on NaY from potassium acetate buffer. 12 The catalyst provided a better biodiesel yield than that from a conventional impregnation.…”

Section: Introductionmentioning

confidence: 99%

“… 12 , 25 Rakmae et al used ultrasound-assisted impregnation to prepare 12 wt % potassium on NaY from potassium acetate buffer. 12 The catalyst provided a better biodiesel yield than that from a conventional impregnation. Recently, Ketzer et al used ultrasound-assisted impregnation to prepare 20% WO 3 on ultrastable zeolite Y (USY) for the production of methyl oleate from oleic acid esterification.…”

Section: Introductionmentioning

confidence: 99%

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Comparative Properties of K/NaX and K/NaY from Ultrasound-Assisted Impregnation and Performance in Transesterification of Palm Oil

et al. 2022

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This work aims to compare physicochemical properties and catalytic performance of potassium supported on zeolite NaX and NaY (K/NaX and K/NaY, respectively) prepared by ultrasound-assisted impregnation from potassium acetate buffer precursor. Calcination converts the potassium precursor to carbonate, which occupies the zeolite cavities and disperses on the external surface. Both calcined samples show a decrease in zeolite phases, BET surface areas, and pore volumes. With the smaller changes, K/NaX is more stable than K/NaY. Moreover, K/NaX has higher basicity than K/NaY and is more active in the decomposition of 2-methylbut-3-yn-2-ol (MBOH), producing dominant products from basic sites. Both K/NaX and K/NaY are active in the transesterification of palm oil, producing more than 94% of the biodiesel yields in the first run. However, the yields drop in the second run because of the leaching of potassium species into glycerol and biodiesel products. The spent K/NaX has a similar phase to the fresh one, whereas the spent K/NaY shows more structure collapse. With better structural stability, less potassium leaching, and less decline in biodiesel yields in the second run, K/NaX is a better catalyst than K/NaY.

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Section: Resultsmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comparative Properties of K/NaX and K/NaY from Ultrasound-Assisted Impregnation and Performance in Transesterification of Palm Oil

et al. 2022

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“…Alwash et al ( 2013 ) found that Fe/Ti-NaY kept its high activity in the decolorization of amaranth after three times of reuse; X-ray diffraction proved that the catalyst was stable after reuse and maintained its crystallinity. Another method to improve the stability of catalyst is doping the active component on supports like graphene and zeolite (Rakmae et al, 2016 ). Even at neutral and alkaline medium, a good decolorization and degradation efficiency could still be achieved in the present of Fe-doped zeolite Y under ultrasound.…”

Section: Fe-based Sonocatalystsmentioning

confidence: 99%

Iron Based Catalysts Used in Water Treatment Assisted by Ultrasound: A Mini Review

Zhang

Xian

et al. 2018

Front. Chem.

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The characteristics and performances of catalyst are the key in catalytic ultrasonic treatment of wastewater, and iron based catalysts are known for low cost, high accessibility and safety. This paper reviewed the current research status of iron-based catalysts in water treatment assisted by ultrasound. Zero valent iron, Fe3O4 and iron composited with other metals were analyzed, their behaviors in catalytic sonochemistry were summarized, and the potential catalytic mechanisms were discussed in details. Finally, the future development in this field was proposed.

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Recent advances in biobased materials and value‐added chemicals

Simanke,

Harrison,

Srinivasan

et al. 2024

AIChE Journal

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Biomass feedstocks are established as a key resource and a viable alternative for an economy less dependent on fossil inputs. This review offers an examination exemplified by fresh references covering strategies to reach a sustainable conversion of biomass to emerging chemicals and materials. Biobased chemicals lead to reduced climate change impacts compared with their fossil‐based counterparts. There is a broad range of products that can be targeted for biobased production, and it is important to select both the feedstocks and the target chemicals, which have a positive environmental impact and opportunity of commercial success. From the perspective of polymer science, we summarize emerging polymers that can be derived from biomass with promising properties. Furthermore, as challenges in the field of emerging biobased materials and chemicals are driven both by performance constraints and economic factors, we also examine recent progress in catalytic and biochemical process towards successful end products.

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Realization of active species in potassium catalysts on zeolite NaY prepared by ultrasound-assisted impregnation with acetate buffer and improved performance in transesterification of palm oil

Cited by 21 publications

References 24 publications

Comparative Properties of K/NaX and K/NaY from Ultrasound-Assisted Impregnation and Performance in Transesterification of Palm Oil

Comparative Properties of K/NaX and K/NaY from Ultrasound-Assisted Impregnation and Performance in Transesterification of Palm Oil

Iron Based Catalysts Used in Water Treatment Assisted by Ultrasound: A Mini Review

Recent advances in biobased materials and value‐added chemicals

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