丙烷脱氢制丙烯技术研究

介绍了催化脱氢、氧化脱氢、膜反应器脱氢等几种丙烷脱氢制丙烯技术,综述了丙烷催化脱氢制丙烯催化剂的研究现状,虽然丙烷催化脱氢生产丙烯已实现了工业化,但其催化剂的性能需进一步提高;对丙烷氧化脱氢制丙烯反应催化剂的研究现状及膜反应器在丙烷脱氢反应上所具有的优越性进行了描述,认为研发具有高稳定性和高透氢性能的氢分离膜,将有望能大幅度提高丙烯的收率。     

丙烷脱氢制丙烯技术研究

介绍了几种丙烷脱氢制丙烯技术：催化脱氢、氧化脱氢、膜反应器脱氢。综述了丙烷催化脱氢制丙烯催化剂的研究现状，虽然丙烷催化脱氢生产丙烯虽已实现了工业化，但其催化剂的性能需进一步提高；综述了丙烷氧化脱氢制丙烯反应催化剂的研究现状及膜反应器在丙烷脱氢反应上所具有的优越性，认为研发具有高稳定性和高透氢性能的氢分离膜，将有望能大幅度提高丙烯的收率。     

丙烷直接脱氢制丙烯的催化剂研究进展

介绍了丙烷脱氢制丙烯的发展进程,丙烷脱氢制丙烯的研究重点是开发高活性和高稳定性的催化剂,综述了用于丙烷直接脱氢制丙烯常用Pt系和Cr系催化剂的研究现状及改性这两类催化剂的方法,最后对丙烷脱氢制丙烯的应用前景及Pt系和Cr系催化剂的研究方向进行了展望。     

丙烷催化脱氢制丙烯技术研究进展

丙烯是一种重要的有机化工原料和石油化工原料中间体。由于能源结构的改变,近年来在国内外市场的需求量持续增长。丙烷直接脱氢制丙烯技术具有收率高、技术成熟、经济环保等优势,成为当前丙烯生产工艺研究的焦点。本文列举了几种常用的丙烷直接脱氢制丙烯的工艺,对技术方法进行了对比,并对催化剂进行了简述。在此基础上,对丙烷催化脱氢新技术以及催化剂发展前景进行了展望。     

丙烷脱氢工艺对比

丙烷脱氢制丙烯的工艺主要有催化脱氢、氧化脱氢和无机膜催化脱氢三大类,详细对比丙烷催化脱氢技术中Oleflex工艺、Catofin工艺、FBD工艺、STAR工艺、Linde工艺的反应机理、工艺流程、催化剂、工艺特点、操作条件等内容,指出丙烷催化脱氢工艺具有良好的工业应用前景,未来需重点加强丙烷脱氢催化剂的研究开发工作,进一步优化工艺流程,提升整体经济性。     

丙烷脱氢制丙烯用单原子催化剂研究进展

丙烯是一种重要的有机化工原料和石油化工原料中间体,近年来在国内外市场的需求量持续增长。丙烷直接脱氢制丙烯技术具有收率高、技术成熟、经济环保等优点,备受研究者们的广泛关注。文中综述了丙烷直接脱氢制丙烯用单原子催化剂的研究进展,介绍了单原子催化剂的丙烷脱氢反应机理,探讨了单原子催化剂的失活行为,总结了活性组分、助剂及载体对单原子催化剂催化丙烷脱氢性能的影响,并分析讨论了单原子催化剂在当前研究中存在的问题。最后针对单原子催化剂虽具有优异的丙烯选择性和稳定性,但存在丙烷脱氢活性依旧不足的问题,提出了调控单原子催化剂电子结构促进丙烷脱氢活性的设计思路,为未来丙烷脱氢制丙烯高效单原子催化剂的设计提供了指导方向。     

丙烷脱氢制丙烯催化剂研究进展

丙烷作为天然气和页岩气等的重要成分,其高效催化转化不仅具有重要的理论研究意义,而且具有广阔的应用前景.丙烷直接脱氢制丙烯已成为增产丙烯的有效手段.对丙烷脱氢反应的铂基催化剂、铬基催化剂、碳基催化剂以及钒基催化剂进行综述,重点介绍载体及助剂对铂基及铬基催化剂活性和稳定性的影响,并提出目前丙烷脱氢反应催化剂研究的关键问题,...     

丙烷催化脱氢制丙烯工艺及催化剂的研究进展

综述了目前世界上丙烷催化脱氢制丙烯的工艺及其迚展,主要包括Oleflex工艺、Catofin工艺、STAR工艺、PDH工艺和FBD工艺。对比了这五种常用工艺方法的基本特点,描述了国内丙烷脱氢制丙烯项目的开工及产能情况,介绍了各种工艺的基本情况,幵对相兲的催化剂迚行了简述。在此基础上,对丙烷催化脱氢制丙烯工艺和相兲催化剂迚行了展望。     

Sn掺杂量对Pt/Sn-MFI催化剂的丙烷脱氢性能影响

随着对丙烯需求的日渐增加,由丙烷催化脱氢制丙烯来实现对丙烯的增产,已成为增产丙烯的重要手段之一。利用水热法制备一系列不同Sn掺杂量的Sn-MFI载体,采用等体积浸渍法制备相同Pt负载量的Pt/Sn-MFI催化剂,通过XRD、N2吸附-脱附、FT-IR和H2-TPR等表征考察不同Sn掺杂量的催化剂对丙烷催化脱氢性能的影响。结果表明,Pt/Sn1. 3%-MFI催化剂具有最高的催化丙烷脱氢活性和稳定性,丙烷初始转化率为43. 3%,丙烯选择性为98. 9%。反应360 min后,丙烷转化率为25. 1%,选择性保持不变。     

丙烷直接脱氢制丙烯催化剂研究进展

丙烯是一种重要的化工原料，其制备工艺技术和产量是衡量一个国家化学工业水平标志之一。目前丙烯的主要生产技术包括催化裂化、石脑油和轻柴油的蒸气裂化等，其中高催化活性、长寿命和低成本的裂化催化剂制备技术是大规模生产丙烯的基础和保障。丙烷脱氢(PDH)制丙烯技术因其技术路线成熟、经济环保，被认为是最具发展潜力的丙烯生产技术之一。其催化剂是PDH的核心和瓶颈，已成为当前的研究热点，得到国内外广大科研人员的关注。首先介绍丙烷直接脱氢制丙烯反应的热力学和反应机理；然后对几种代表性的PDH催化剂制备技术与催化活性进行较为详尽的综述，总结归纳各类催化剂的化学组成、催化剂的作用机制以及活性物种和性质对催化丙烷脱氢性能的影响，并分析讨论相应催化剂存在的问题；最后，提出今后丙烷脱氢催化剂的重点研究方向，为未来丙烷脱氢制丙烯高效催化剂的设计和研究提供新的视角。     

碳基硼基催化体系丙烷氧化脱氢催化剂的研究进展

以碳基硼基为代表的非金属催化剂氧化能力不如金属氧化物,这使得非金属催化体系如碳基和硼基催化剂对于丙烷氧化脱氢反应具有独特的优势。本文综述了应用廉价环保型改性碳基和硼基的非金属丙烷脱氢催化剂将丙烷转化为丙烯的技术前沿,阐述了有序介孔炭材料,纳米碳材料（纳米纤维、石墨烯、碳纳米金刚石等）和六方氮化硼材料各自的丙烷氧化脱氢机理以及通过杂原子改性后提高其催化活性的情况。并对其未来的发展方向以及丙烷氧化脱氢新材料领域的发展做了展望。     

The effects of bimetallic interactions for CO2-assisted oxidative dehydrogenation and dry reforming of propane

The catalytic reduction of CO₂ by propane may occur via dry reforming to produce syngas (CO + H₂) or oxidative dehydrogenation to yield propylene. Utilizing propane and CO₂ as coreactants presents several advantages over conventional methane dry reforming or direct propane dehydrogenation, including lower operating temperatures and less coke formation. Thus, it is of great interest to identify catalytic systems that can either effectively break the C C bond to generate syngas or selectively break C H bonds to produce propylene. In this study, several precious and nonprecious bimetallic catalysts supported on reducible CeO₂ were investigated using flow reactor studies at 823 K to identify selective catalysts for CO₂-assisted reforming and dehydrogenation of propane.     

New Integrated Catalytic Membrane Processes for Enhanced Propylene and Polypropylene Production

Newly reported integrated processes are discussed for aliphatic (paraffin) hydrocarbon dehydrogenation into olefins and subsequent polymerization into polyolefins (e.g., propane to propylene to polypropylene, ethane to ethylene to polyethylene). Catalytic dehydrogenation membrane reactors (permreactors) made by inorganic or metal membranes are employed in conjunction with fluid bed polymerization reactors using coordination catalysts. The catalytic propane dehydrogenation is considered as a sample reaction in order to design an integrated process of enhanced propylene polymerization. Related kinetic experimental data of the propane dehydrogenation in a fixed bed type catalytic reactor is reviewed which indicates the molecular range of the produced C₁-C₃ hydrocarbons. Experimental membrane reactor conversion and yield data are also reviewed. Experimental data were obtained with catalytic membrane reactors using the same catalyst as the non-membrane reactor. Developed models are discussed in terms of the operation of the reactors through computational simulation, by varying key reactor and reaction parameters. The data show that it is effective for catalytic permreactors to provide streams of olefins to successive polymerization reactors for the end production of polyolefins (i.e., polypropylene, polyethylene) in homopolymer or copolymer form. Improved technical, economic, and environmental benefits are discussed from the implementation of these processes.     

Pure Hydrogen and Propylene Coproduction in Catalytic Membrane Reactor-Assisted Propane Dehydrogenation

Propane dehydrogenation on a commercial Pt-Sn/Al₂O₃ catalyst in a Pd-Ag membrane reactor is considered. A mathematical model is developed to evaluate the performance of the catalytic membrane reactor for the process of propane dehydrogenation. Design and operating conditions are systematically evaluated for key performance metrics such as propane conversion, propylene selectivity, hydrogen selectivity, and hydrogen recovery under different operating conditions. The results confirm that the high performance of the membrane reactor is related to the continuous removal of hydrogen from the reaction zone to shift the reaction equilibrium towards the formation of more propylene and hydrogen.     

丙烷脱氢制丙烯催化剂的研究进展

丙烷脱氢产业的迅猛发展亟需研发新一代高性能催化剂。本综述阐述了近年来新型负载型Pt纳米簇、金属氧化物和碳材料在丙烷脱氢反应中的研究进展。文章指出：Pt纳米簇的分散性和稳定性是决定其脱氢性能的关键因素;通过发展新合成技术和调节载体性质能改进其催化活性。金属氧化物中不饱和金属阳离子是脱氢反应的活性位点;调节载体的性质、优化制备方法以及结构掺杂都可显著提高其催化活性。碳材料中的含氧官能团被认为是丙烷脱氢反应的活性中心;对碳材料的比表面积、孔道性质及含氧官能团的数量等参数进行合理调控,能改善其催化性能。最后,文章提出未来的研究将重点解决Pt纳米簇的抗烧结性能弱、氧化物的本征活性低、碳材料高温稳定性差的问题,实现该领域的重大突破。     

The use of niobia in oxidation catalysis

This paper summarises the background to work carried out at the University of Twente on the use of niobia as a catalyst for the oxidative dehydrogenation of propane to propylene and discusses the development of promoted niobia catalysts for this reaction. Results are also presented which illustrate the use of niobia in catalysts for other reactions such as the oxidative coupling of methane, the oxidative dehydrogenation of ethane and the oxidative dehydrogenation of methanol. It appears that niobia and niobia-modified catalysts, when used in high-temperature oxidation processes, can exhibit relatively high selectivities compared with more conventional catalysts.     

Oxidative dehydrogenation of ethane and propane over Mn-based catalysts

The catalytic performances of Mn-based catalysts have been investigated for the oxidative dehydrogenation of both ethane (ODE) and propane (ODP). The results show that a LiCl/MnO_x/PC (Portland cement) catalyst has an excellent catalytic performance for oxidative dehydrogenation of both ethane and propane to ethylene and propylene, more than 60% alkanes conversion and more than 80% olefins selectivity could be achieved at 650°C. In addition, the results indicate that Mn-based catalysts belong to p-type semiconductors, the electrical conductivity of which is the main factor in influencing the olefins selectivity. Lithium, chlorine and PC in the LiCl/MnO_x/PC catalyst are all necessary components to keep the excellent catalytic performance at a low temperature. This revised version was published online in July 2006 with corrections to the Cover Date.