Stable and selective catalysts for propane dehydrogenation operating at thermodynamic limit

Science ◽  
2021 ◽  
Vol 373 (6551) ◽  
pp. 217-222
Author(s):  
Ali Hussain Motagamwala ◽  
Rawan Almallahi ◽  
James Wortman ◽  
Valentina Omoze Igenegbai ◽  
Suljo Linic
Keyword(s):  
Oxide Phase ◽  
Propane Dehydrogenation ◽  
Great Promise ◽  
Supported Platinum ◽  
Global Demand ◽  
Propylene Conversion ◽  
Stable Performance ◽  
Propylene Production ◽  
Atomic Mixing ◽  
Excellent Stability

Intentional (“on-purpose”) propylene production through nonoxidative propane dehydrogenation (PDH) holds great promise for meeting the increasing global demand for propylene. For stable performance, traditional alumina-supported platinum-based catalysts require excess tin and feed dilution with hydrogen; however, this reduces per-pass propylene conversion and thus lowers catalyst productivity. We report that silica-supported platinum-tin (Pt1Sn1) nanoparticles (<2 nanometers in diameter) can operate as a PDH catalyst at thermodynamically limited conversion levels, with excellent stability and selectivity to propylene (>99%). Atomic mixing of Pt and Sn in the precursor is preserved upon reduction and during catalytic operation. The benign interaction of these nanoparticles with the silicon dioxide support does not lead to Pt-Sn segregation and formation of a tin oxide phase that can occur over traditional catalyst supports.

Propane Dehydrogenation Technology; A Viable Alternative to Meet Nigeria's Growing Propylene Demand

2021 ◽  
Author(s):  
Solomon Ichado
Keyword(s):  
Petrochemical Industry ◽  
West African ◽  
Propane Dehydrogenation ◽  
Market Size ◽  
The West ◽  
Operation Process ◽  
Major Player ◽  
Global Demand ◽  
Import And Export ◽  
Propylene Production

Abstract Global propylene demand increases year on year, conventional sources of propylene production like steam crackers, refinery fluid catalytic cracker (FCC) are unable to meet global demand for propylene and this has necessitated the use of "On-Purpose" sources for propylene production like propane dehydrogenation (PDH). The PDH and its impact in the propylene mix of the Nigerian petrochemical industry is what this work is centered on. The need for PDH technology in Nigeria stems from the reality that, Nigeria currently has no refinery with operational fluid catalytic cracker nor sufficient steam crackers to meet an estimated propylene demand gap of about 140 KTA (2016/2017) despite propylene production from a major player in Nigeria (at present, demand gap is expected to be more). This work involves analysis of Nigeria's petrochemical import and export, petrochemical market size, exposition to the PDH trendand technology focusing on UOP Oleflex technology (chemistry and operation/process flow) and how this technology can help close the current propylene demand gap in Nigeria especially as Nigeria enters its decade of gas. Petrochemical companies in Asia have been able to use this PDH technology to manufacture propylene thereby significantly closing the propylene demand gap, constructing the most PDH plants in the last 5 years in the process. This also can be replicated in Nigeria and aid in closing propylene demand gap, and with surplus, begin to export propylene to the West African market to generate revenue, improving GDP.

Propane dehydrogenation over supported platinum silicon nitride catalysts

2002 ◽  
Vol 225 (1-2) ◽  
pp. 261-270 ◽  
Author(s):  
D Hullmann ◽  
G Wendt ◽  
U Šingliar ◽  
G Ziegenbalg
Keyword(s):  
Silicon Nitride ◽  
Propane Dehydrogenation ◽  
Supported Platinum

Highly selective propylene production in a membrane assisted catalytic propane dehydrogenation

2017 ◽  
Vol 330 ◽  
pp. 1119-1127 ◽  
Author(s):  
Antonio Ricca ◽  
Vincenzo Palma ◽  
Gaetano Iaquaniello ◽  
Emma Palo ◽  
Annarita Salladini
Keyword(s):  
Propane Dehydrogenation ◽  
Propylene Production

Propane Dehydrogenation in a Modified Porous Membrane Reactor for Producing Propylene with Chemical and Polymer Grades

2005 ◽  
Vol 5 (2) ◽  
pp. 176
Author(s):  
Azis Trianto ◽  
Yazid Bindar ◽  
Noezran Noezran
Keyword(s):  
Membrane Reactor ◽  
Porous Membrane ◽  
Inert Gas ◽  
Propane Dehydrogenation ◽  
Process Flow ◽  
Gas Concentration ◽  
Simultaneous Production ◽  
Study Results ◽  
Propylene Production ◽  
Side Outlet

Propane dehydrogenation is a promising route for producing propylene to replace traditional cracking methods. A membrane reactor offers a possibility to produce not only chemical grade but also polymer grade of propylene. The purpose of the present study is to evaluate the performance of a Modified Porous Membrane Reactor (MPMR) in producing these two propylene grades simultaneously. The study involves evaluations based on thermodynamics and process flow sheeting. The performance of this reactor is compared to that of conventional reactor. At first, the thermodynamics is conducted using minimum Gibb's Energy approach. Then the process flow sheeting evaluation is built using the HYSYS simulator. The effect of inert gas (steam) concentration in both sweep and feed sides is investigated. The thermodynamics study results optimum temperature and inert gas concentration to obtain these two grades of propylene simultaneously. The propylene with polymer grade above 99% is produced from the sweep side outlet. The propylene with chemical grade is produced from the feed side outlet. The simultaneous production of these two grades of propylene has benefit in vanishing propane-propylene splitter. Keywords: Membrane reactor, porous membrane, propane dehydrogenation, propylene production, and process simulation.

Framework-confined Sn in Si-beta stabilizing ultra-small Pt nanoclusters as direct propane dehydrogenation catalysts with high selectivity and stability

2019 ◽  
Vol 9 (24) ◽  
pp. 6993-7002 ◽  
Author(s):  
Yansu Wang ◽  
Zhong-Pan Hu ◽  
Wenwen Tian ◽  
Lijiao Gao ◽  
Zheng Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
High Selectivity ◽  
Synthesis Method ◽  
Propane Dehydrogenation ◽  
High Catalytic Activity ◽  
Pt Nanoclusters ◽  
Post Synthesis ◽  
Excellent Stability

Highly stable Pt/Sn-Si-beta catalysts were prepared via an improved post-synthesis method, exhibiting high catalytic activity, good selectivity and excellent stability for propane dehydrogenation to propene.

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

Catalysts ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1070
Author(s):  
Marco Martino ◽  
Eugenio Meloni ◽  
Giovanni Festa ◽  
Vincenzo Palma
Keyword(s):  
Catalytic Activity ◽  
Reaction Rate ◽  
Review Article ◽  
The Other ◽  
Propane Dehydrogenation ◽  
Crucial Importance ◽  
Acid Base ◽  
Dehydrogenation Reaction ◽  
The Past ◽  
Propylene Production

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.

Sign in / Sign up

Export Citation Format

Share Document