Stable and selective catalysts for propane dehydrogenation operating at thermodynamic limit

Motagamwala, Ali Hussain; Almallahi, Rawan; Wortman, James; Igenegbai, Valentina Omoze; Linic, Suljo

doi:10.1126/science.abg7894

Cited by 245 publications

(193 citation statements)

References 61 publications

Supporting

Mentioning

187

Contrasting

Order By: Relevance

“…This is supported by the results of TEM and H 2 -O 2 titration ( Figure 3 and Table 1 ). Noteworthy, besides the band at 2060 cm −1 , a weak adsorption band was detected over PtCe/SiO 2 at 1820 cm −1 , ascribed to the bridge-bonded CO on two neighboring Pt atoms [ 24 ]. However, it disappeared in the case of PtSnCe/SiO 2 , accompanying a decreased intensity of the linear adsorption peak at 2060 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

“…However, it disappeared in the case of PtSnCe/SiO 2 , accompanying a decreased intensity of the linear adsorption peak at 2060 cm −1 . The disappeared bridge-bonded CO over PtSnCe/SiO 2 suggests that the SnO 2 breaks the ensemble of Pt atoms and forms a checkerboard Pt-Sn surface structure [ 24 , 50 ] because CO does not adsorb at the bridge sites between Sn and Pt. The decreased intensity of the peak at 2060 cm −1 , in comparison with PtCe/SiO 2 , can be explained as the reduced surface coverage of CO due to the presence of SnO 2 [ 51 ].…”

Section: Resultsmentioning

confidence: 99%

“…Based on these analyses, the combination of PtSn with CeO 2 may create a good CO 2 -ODP catalyst, provided that the assisted activation of CO 2 is achieved by oxygen defects over CeO 2 . Moreover, silica is widely used as a support for the CO 2 -ODP reaction [ 6 ], the side reactions of which are inhibited in comparison with Al 2 O 3 with a higher acidity [ 24 , 25 ]. Thus, in this work, a high-performance CO 2 -ODP catalyst was developed by simply impregnating the CeO 2 precursor into PtSn/SiO 2 .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

CeO2-Promoted PtSn/SiO2 as a High-Performance Catalyst for the Oxidative Dehydrogenation of Propane with Carbon Dioxide

et al. 2022

View full text Add to dashboard Cite

The oxidative dehydrogenation of propane with CO2 (CO2-ODP) has been extensively investigated as a promising green technology for the efficient production of propylene, but the lack of a high-performance catalyst is still one of the main challenges for its industrial application. In this work, an efficient catalyst for CO2-ODP was developed by adding CeO2 to PtSn/SiO2 as a promoter via the simple impregnation method. Reaction results indicate that the addition of CeO2 significantly improved the catalytic activity and propylene selectivity of the PtSn/SiO2 catalyst, and the highest space-time yield of 1.75 g(C3H6)·g(catalyst)−1·h−1 was achieved over PtSn/SiO2 with a Ce loading of 6 wt%. The correlation of the reaction results with the characterization data reveals that the introduction of CeO2 into PtSn/SiO2 not only improved the Pt dispersion but also regulated the interaction between Pt and Sn species. Thus, the essential reason for the promotional effect of CeO2 on CO2-ODP performance was rationally ascribed to the enhanced adsorption of propane and CO2 originating from the rich oxygen defects of CeO2. These important understandings are applicable in further screening of promoters for the development of a high-performance Pt-based catalyst for CO2-ODP.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

CeO2-Promoted PtSn/SiO2 as a High-Performance Catalyst for the Oxidative Dehydrogenation of Propane with Carbon Dioxide

et al. 2022

View full text Add to dashboard Cite

show abstract

“…A mixture of PtSn and Pt3Sn alloys was also obtained by direct reduction method, i.e., without conventional calcination, of Pt-Sn/Al2O3 catalyst [37]. Good performance has also been reported with Pt1Sn1/SiO2 catalysts, in which the interaction with the support prevents the Pt-Sn segregation and formation of a tin oxide phase [38].…”

Section: Bimetallic and Promoted Catalystsmentioning

confidence: 99%

Propylene Synthesis: Recent Advances in the Use of Pt-Based Catalysts for Propane Dehydrogenation Reaction

et al. 2021

View full text Add to dashboard Cite

Propylene is one of the most important feedstocks in the chemical industry, as it is used in the production of widely diffused materials such as polypropylene. Conventionally, propylene is obtained by cracking petroleum-derived naphtha and is a by-product of ethylene production. To ensure adequate propylene production, an alternative is needed, and propane dehydrogenation is considered the most interesting process. In literature, the catalysts that have shown the best performance in the dehydrogenation reaction are Cr-based and Pt-based. Chromium has the non-negligible disadvantage of toxicity; on the other hand, platinum shows several advantages, such as a higher reaction rate and stability. This review article summarizes the latest published results on the use of platinum-based catalysts for the propane dehydrogenation reaction. The manuscript is based on relevant articles from the past three years and mainly focuses on how both promoters and supports may affect the catalytic activity. The published results clearly show the crucial importance of the choice of the support, as not only the use of promoters but also the use of supports with tuned acid/base properties and particular shape can suppress the formation of coke and prevent the deep dehydrogenation of propylene.

show abstract

“…However, these methods cannot meet the fast-increasing demand of propylene for the low selectivity to propylene and the rapid consumption of fossil resources [9]. Therefore, to develop more efficient technologies for fabricating of propylene such as dehydrogenation of propane (DHP) [10], methanolto-olefins (MTO) [11], coal-to-olefins (CTO) [12], Fischer-Tropsch to Olefins (FTO) [13], and C4 olefin disproportionation technology [14] is highly important. Among them, the DHP technology, as an on-purpose route to obtain propylene, has gradually become the main force to produce propylene in recent years (Figs.…”

Section: Introductionmentioning

confidence: 99%

Research progress of CO2 oxidative dehydrogenation of propane to propylene over Cr-free metal catalysts

Wang

et al. 2022

Rare Met.

View full text Add to dashboard Cite

CO 2 -assisted oxidative dehydrogenation of propane (CO 2 -ODHP) is an attractive strategy to offset the demand gap of propylene due to its potentiality of reducing CO 2 emissions, especially under the demands of peaking CO 2 emissions and carbon neutrality. The introduction of CO 2 as a soft oxidant into the reaction not only averts the over-oxidation of products, but also maintains the high oxidation state of the redox-active sites. Furthermore, the presence of CO 2 increases the conversion of propane by coupling the dehydrogenation of propane (DHP) with the reverse water gas reaction (RWGS) and inhibits the coking formation to prolong the lifetime of catalysts via the reverse Boudouard reaction. An effective catalyst should selectively activate the C-H bond but suppress the C-C cleavage. However, to prepare such a catalyst remains challenging. Chromium-based catalysts are always applied in industrial application of DHP; however, their toxic properties are harmful to the environment. In this aspect, exploring environment-friendly and sustainable catalytic systems with Cr-free is an important issue. In this review, we outline the development of the CO 2 -ODHP especially in the last ten years, including the structural information, catalytic performances, and mechanisms of chromium-free metal-based catalyst systems, and the role of CO 2 in the reaction. We also present perspectives for future progress in the CO 2 -ODHP.

show abstract

Stable and selective catalysts for propane dehydrogenation operating at thermodynamic limit

Cited by 245 publications

References 61 publications

CeO2-Promoted PtSn/SiO2 as a High-Performance Catalyst for the Oxidative Dehydrogenation of Propane with Carbon Dioxide

CeO2-Promoted PtSn/SiO2 as a High-Performance Catalyst for the Oxidative Dehydrogenation of Propane with Carbon Dioxide

Propylene Synthesis: Recent Advances in the Use of Pt-Based Catalysts for Propane Dehydrogenation Reaction

Research progress of CO2 oxidative dehydrogenation of propane to propylene over Cr-free metal catalysts

Contact Info

Product

Resources

About