Catalytic cracking of light-naphtha over MFI-zeolite/metal-oxide composites for efficient propylene production

Hodoshima, Shinya; Motomiya, Azusa; Wakamatsu, Shuhei; Kanai, Ryuichi; Yagi, Fuyuki

doi:10.1007/s11164-015-2023-4

Cited by 12 publications

(4 citation statements)

References 9 publications

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“…Those chemicals are precursors in many products for painting, coating, and automotive parts. 3,4 Typically, propylene can be produced from steam cracking of liquid feedstocks, 5 catalytic cracking refinery units, 5,6 and propane dehydrogenation (PDH) reaction. 7 Among those processes, PDH is a simple approach to generate propylene by direct elimination of two H atoms from propane using effective heterogeneous catalysts.…”

Section: Introductionmentioning

confidence: 99%

“…Propylene is an important monomer to produce polypropylene, which is a useful polymer for automotive part, textile, furniture, clothing, tube, and packaging applications. , Moreover, it is a crucial chemical feedstock to synthesize other important chemicals, such as propylene oxide, acrylic acid, acrylonitrile, cumene, and alcohols. Those chemicals are precursors in many products for painting, coating, and automotive parts. , Typically, propylene can be produced from steam cracking of liquid feedstocks, catalytic cracking refinery units, , and propane dehydrogenation (PDH) reaction . Among those processes, PDH is a simple approach to generate propylene by direct elimination of two H atoms from propane using effective heterogeneous catalysts. − The PDH mechanisms and side reactions, including C–C bond cleavage and deep dehydrogenation on catalyst surface, have been proposed as illustrated in Scheme .…”

Section: Introductionmentioning

confidence: 99%

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Theoretical Insight into Catalytic Propane Dehydrogenation on Ni(111)

et al. 2018

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Here, propane dehydrogenation (PDH) to propylene and side reactions, namely, cracking and deep dehydrogenation on Ni(111) surface, have been theoretically investigated by density functional theory calculation. On the basis of adsorption energies, propane is physisorbed on Ni(111) surface, whereas propylene exhibits chemisorption supported by electronic charge results. In the PDH reaction, possible pathways can occur via two possible intermediates, i.e., 1-propyl and 2-propyl. Our results suggest that PDH reaction through 1-propyl intermediate is both kinetically and thermodynamically more favorable than another pathway. The C–C bond cracking during PDH process is more difficult to occur than the C–H activation reaction because of higher energy barrier of the C–C bond cracking. However, deep dehydrogenation is the preferable process after PDH, owing to the strong adsorption of propylene on Ni(111) surface, resulting in low selectivity of propylene production. This work suggests that Ni(111) has superior activity toward PDH; however, the enhancement of propylene desorption is required to improve its selectivity. The understanding in molecular level from this work is useful for designing and developing better Ni-based catalysts in terms of activity and selectivity for propane conversion to propylene.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Theoretical Insight into Catalytic Propane Dehydrogenation on Ni(111)

et al. 2018

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“…Propylene is an important chemical raw material, and its downstream products of great variety are closely related to people’s life. Driven by this, the demand for basic organic chemical products generated from propylene has soared, and the propane to propylene process solves both the propane surplus and the propylene shortage problem. , As a new process for the production of propylene, direct dehydrogenation of propane has the advantages of high yield and less byproducts compared with the traditional steam cracking process . Given the good economic prospect of this process, propane dehydrogenation (PDH) has attracted extensive attention from the catalysis community to develop more efficient heterogeneous catalysts than the commercial Pt and CrO x catalysts used in industry. − As shown in Scheme , competing side reactions of PDH involve the deep dehydrogenation of propylene and the cracking of the C3 species.…”

Section: Introductionmentioning

confidence: 99%

“…1,2 As a new process for the production of propylene, direct dehydrogenation of propane has the advantages of high yield and less byproducts compared with the traditional steam cracking process. 3 Given the good economic prospect of this process, propane dehydrogenation (PDH) has attracted extensive attention from the catalysis community to develop more efficient heterogeneous catalysts than the commercial Pt and CrO x catalysts used in industry. 4−8 As shown in Scheme 1, competing side reactions of PDH involve the deep dehydrogenation of propylene and the cracking of the C3 species.…”

Section: Introductionmentioning

confidence: 99%

Structure Sensitivity Study of Propane Dehydrogenation on Cobalt Catalysts: HCP versus FCC

Liang,

Zeng,

Dang

et al. 2023

J. Phys. Chem. C

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In heterogeneous catalysis, it is crucial to understand the structure sensitivity in order to elucidate the reaction mechanism and rationally design optimal catalysts. In this work, propane dehydrogenation (PDH) and side reactions (cracking and deep dehydrogenation) were studied by density functional theory calculations on Co catalysts with different crystallographic structures: face-centered cubic (FCC) and hexagonal closed packed (HCP). Wulff construction reveals that the most stable facet of each crystallographic structure, viz. Co(111) and Co(0001), cover 76.2% and 19.4% of the exposed surface. Various reaction pathways for PDH, deep dehydrogenation, and cracking were explored on Co(111) and Co(0001). Microkinetic simulation results suggest that PDH proceeds through both dehydrogenation pathways (via 1-propyl or 2-propyl intermediate) on Co(111), while it favors path A (via 1-propyl intermediate) on Co(0001). At typical reaction conditions of PDH, Co(111) is more active than Co(0001) by 1.3 times, while the latter is more selective toward propylene production and more resistive to coke formation. Compared to Pt(111), both Co surfaces are more active for PDH while Co(0001) is also more selective toward propylene formation. This work provides fundamental insights into the crystallographic structure sensitivity of propane dehydrogenation on a Co catalyst and useful guidance to achieve better catalytic performance for a Co catalyst.

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Recent Advances in Catalytic Conversion of C5/C6 Alkanes to Olefins: A Review

Wang

2022

Catal Surv Asia

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Catalytic cracking of light-naphtha over MFI-zeolite/metal-oxide composites for efficient propylene production

Cited by 12 publications

References 9 publications

Theoretical Insight into Catalytic Propane Dehydrogenation on Ni(111)

Theoretical Insight into Catalytic Propane Dehydrogenation on Ni(111)

Structure Sensitivity Study of Propane Dehydrogenation on Cobalt Catalysts: HCP versus FCC

Recent Advances in Catalytic Conversion of C5/C6 Alkanes to Olefins: A Review

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