Author: Derrick W. FlickPublisher:
ISBN:
Category : Alkanes
Languages : en
Pages : 514
Book Description
Catalysts for the Oxidative Dehydrogenation of Alkanes at Millisecond Contact Times
Author: Derrick W. FlickPublisher:
ISBN:
Category : Alkanes
Languages : en
Pages : 514
Book Description
The Partial Oxidation of Light Hydrocarbons Over Noble Metal Catalysts at Less Than Millisecond Contact Times
Author: Paul Matthew WittDiscovery and Development of Heterogeneous Catalysts for the Oxidative Dehydrogenation of Alkanes
Author: Joseph GrantPublisher:
ISBN:
Category :
Languages : en
Pages : 108
Book Description
The recent surge in shale gas resources creates new opportunities to improve process efficiencies for the production of important chemical building blocks. Non-oxidative dehydrogenation of propane (PDH), the primary "on-purpose" propylene technology used worldwide today, has process inefficiencies that may be improved by co-feeding oxygen and propane to drive the oxidative dehydrogenation (ODH) of propane reaction. However, after decades of catalyst research for ODH of propane this reaction has yet to be commercialized due to the difficulty of controlling this partial oxidation to selectively yield propylene rather than the more-thermodynamically stable CO and CO2 (COx) products. This thesis explores the reactivity and properties of two very different classes of catalysts for the ODH of alkanes: 1) supported vanadia and 2) boron-containing catalysts. Supported vanadia catalysts, the most-studied catalyst for this transformation in the literature, show markedly higher selectivity to propylene when existing as dispersed two-dimensional metal oxide surface species. By introducing a small amount of Na+ to the surface of SiO2, the maximum two-dimensional surface density can be dramatically enhanced. This effect is proved using spectroscopic characterization, as well as the ODH of propane used as a probe reaction. Boron-containing compounds, especially boron nitride (BN) materials, were previously overlooked as catalysts for the ODH of alkanes, and rather deemed to be inert. On the contrary, these B-containing catalysts are now considered to be among the most-selective catalysts for the ODH of alkanes as a method to form their corresponding olefins. The rate of alkane consumption is dependent on oxygen adsorption to the catalyst surface, and shows second-order dependence in the concentration of the alkane. At these temperatures (400-500°C) oxygen adsorption to the B-containing catalyst only occurs when exposed to the ODH reaction (not only air or a combination of air and steam), and is verified with numerous spectroscopic techniques including X-ray Photoelectron Spectroscopy (XPS), and Attenuated Total Reflectance Infrared (ATR-IR). Recent work with X-ray Absorption Spectroscopy (XAS) and 11B MAS NMR dismisses the possibility that a potential B2O3 surface layer acts as the active site by revealing that B2O3 is not present on spent catalysts.
Staged Catalysts for Millisecond Contact Time Reactions
Author: Srinivas TummalaCatalytic Combustion at Millisecond Contact Times
Author: Christian Thomas GoralskiPublisher:
ISBN:
Category :
Languages : en
Pages : 398
Book Description
12th International Congress on Catalysis
Author: A. CormaPublisher: Elsevier
ISBN: 0080528635
Category : Technology & Engineering
Languages : en
Pages : 2051
Book Description
The twelfth Congress on Catalysis was held in Granada (Spain) under the auspices of the International Association of Catalysis Societies and the Spanish Society of Catalysis. These four-volume Proceedings are the expression of the Scientific Sessions which constituted the main body of the Congress.They include 5 plenary lectures, 1 award lecture, 8 keynote lectures, 124 oral presentations and 495 posters. The oral and poster contributions have been selected on the basis of the reports of at least two international reviewers, according to standards comparable to those used for specialised journals.
Third World Congress on Oxidation Catalysis
Author: S.T. OyamaPublisher: Elsevier
ISBN: 0080544711
Category : Technology & Engineering
Languages : en
Pages : 1277
Book Description
The overall theme of the 3rd World Congress is "Atom Efficient Catalytic Oxidations for Global Technologies". This theme was chosen to stimulate the participants to report their findings with an emphasis on conserving valuable material in their catalytic transformations, as well as conserving energy, in an environmentally responsible manner. Progress towards this stated goal is substantial as evidenced by the tremendous response of the community in their participation of quality publications complied in these Proceedings of the Congress. The subjects presented span a wide range of oxidation reactions and catalysts. These include the currently important area of lower alkane oxidation to the corresponding olefins, unsaturated aldehydes, acids and nitriles. The four featured lectures and seven plenary lectures constitute the general background and overview of the subject matter at hand. The 104 contributed papers and 13 poster manuscripts, summarized in this compendium, probe new avenues to achieve catalytically efficient oxidation reactions for the future needs of mankind in a global environment.
Fast Lightoff of Millisecond Catalytic Partial Oxidation Reactors
Author: Corey Andrew LeclercPublisher:
ISBN:
Category :
Languages : en
Pages : 304
Book Description
Chemicals from Heavy Fuels in Millisecond Catalytic Reactions
Author: Jakob Jose KrummenacherPublisher:
ISBN:
Category :
Languages : en
Pages : 334
Book Description
Catalytic Oxidative Dehydrogenation of Light Alkanes
Author: Ali Saberi MoghaddamPublisher:
ISBN:
Category : Alkanes
Languages : en
Pages : 610
Book Description