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Author: Chʻeng-liang Chang
Publisher:
ISBN:
Category : Alcohol
Languages : en
Pages : 510
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Book Description
Author: Chʻeng-liang Chang
Publisher:
ISBN:
Category : Alcohol
Languages : en
Pages : 510
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 15
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Book Description
Mixed alcohols are attractive oxygenated products of biomass-derived syngas because they may be catalytically converted to a range of hydrocarbon products, including liquid hydrocarbon fuels. Catalytic dehydration to form olefins is a potential first step in the conversion of C2-C4 alcohols into longer-chain hydrocarbons. Here, we describe the physical and chemical characterization along with catalytic activity and selectivity of 4 Brønsted and Lewis acidic catalysts for the dehydration of two mixed alcohol feed streams that are representative of products from syngas conversion over K-CoMoS type catalysts (i.e., ethanol, 1-propanol, 1-butanol and 2-methyl-1-propanol). Specifically, a Lewis acidic Zr-incorporated mesoporous silicate (Zr-KIT-6), a commercial Al-containing mesoporous silicate (Al-MCM-41), a commercial microporous aluminosilicate (HZSM-5), and a commercial microporous silicoaluminophosphate (SAPO-34) were tested for mixed alcohol dehydration at 250, 300 and 350 °C. The zeolite materials exhibited high activity (>98% ethanol conversion) at all temperatures while the mesoporous materials only displayed significant activity (>10% ethanol conversion) at or above 300 °C. The turnover frequencies for ethanol dehydration at 300 °C decreased in the following order: HZSM-5> SAPO-34> Al-MCM-41> Zr-KIT-6, suggesting that Brønsted acidic sites are more active than Lewis acidic sites for alcohol dehydration. At 300 °C, SAPO-34 produced the highest yield of olefin products from both a water-free ethanol rich feed stream and a C3+-alcohol rich feed stream containing water. Post-reaction characterization indicated changes in the Brønsted-to-Lewis acidic site ratios for Zr-KIT-6, Al-MCM-41 and HZSM-5. Ammonia temperature programmed desorption indicated that the acid sites of post-reaction samples could be regenerated following treatment in air. The post-reaction SAPO-34 catalyst contained more aromatic, methylated aromatic and polyaromatic compounds than its zeolite counterpart HZSM-5, while no aromatic compounds were observed on post-reaction Al-MCM-41 or Zr-KIT-6 catalysts. Olefin yield at 300 °C over SAPO-34 (>95%) was comparable to published values for the methanol-to-olefins process, indicating the potential industrial application of mixed alcohol dehydration. Furthermore, the olefin product distribution over SAPO-34 was tunable by the composition of the alcohol feed mixture.
Author: Jean-pierre Gilson
Publisher: World Scientific
ISBN: 178326117X
Category : Science
Languages : en
Pages : 390
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Book Description
This book, written and edited by leading authorities from academia and industrial groups, covers both preventive- and curative-zeolite-based technologies in the field of chemical processing.The opening chapter presents the state of the art in zeolite science. The two subsequent chapters summarize the chemistries involved in the processes and the constraints imposed on the catalyst/adsorbent. Three major areas are covered: oil refining, petrochemicals and fine chemicals. A chapter on the (curative) use of zeolites in pollution abatement completes this overview.In the area of oil refining, a general lecture sets the scene for present and future challenges. It is followed by in-depth case studies involving FCC, hydrocracking and light naphtha isomerization. Also, an entire chapter is devoted to the often-overlooked subject of base oils.In the area of petrochemicals, the processing of aromatics and olefins is described and special attention is paid to the synergy between catalysis and separation on molecular sieves.
Author: Bo Zhang
Publisher: Nova Science Publishers
ISBN: 9781626183469
Category : Biomass energy
Languages : en
Pages : 0
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Book Description
Biomass presents an attractive source for the production of fuels and chemicals, mainly due to the concerns over the depleting fossil fuel, growing awareness of environmental issues associated with fossil fuel consumption, and increasing world energy demand. Biomass resources include agricultural and forest residues, energy crops, livestock residues as well as municipal solid waste. These biomass resources are first processed into a conversion-friendly form, followed by the transformation to a wide range of energy and/or chemical products using two primary biorefinery platforms: biochemical and thermochemical. This book covers the most recent advances in biomass processing, biochemical and thermochemical conversion technologies, and thus, serves as a useful reference to agriculture engineers, chemical engineers, biotechnology engineers and engineering students. The contents of the book are divided into three sections: biomass overview and processing, biomass thermochemical and biochemical conversion technologies, and integrated biorefinery processes.
Author: Ozcan Konur
Publisher: CRC Press
ISBN: 1000958736
Category : Technology & Engineering
Languages : en
Pages : 401
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Book Description
Presents the direct use of bioethanol fuels in electric cars and the indirect use of bioethanol fuels in electric cars in the form of biohydrogen produced from bioethanol fuels Discusses bioethanol fuel-based bioelectricity production, bioethanol fuel-based biochemical and biohydrocarbon production Discusses direct bioethanol fuel cells, bioethanol fuel electrooxidation, catalysts for bioethanol fuel oxidation, and nanotechnology applications in fuel cells Includes case studies of bioethanol fuel-based biochemical and biohydrocarbon production, nanosensors, ZnO-based nanosensors, and SnO2-based nanosensors
Author: Eike Brunner
Publisher: Springer Science & Business Media
ISBN: 3540739645
Category : Science
Languages : en
Pages : 280
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Book Description
This is the first handbook on zeolites and other microporous materials. It is an up-to-date, highly sophisticated collection of information for those who deal with zeolites in industry or at academic institutions as well as being a guide for newcomers.
Author: Bruce J Berne
Publisher: World Scientific
ISBN: 9814496057
Category : Science
Languages : en
Pages : 881
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Book Description
The school held at Villa Marigola, Lerici, Italy, in July 1997 was very much an educational experiment aimed not just at teaching a new generation of students the latest developments in computer simulation methods and theory, but also at bringing together researchers from the condensed matter computer simulation community, the biophysical chemistry community and the quantum dynamics community to confront the shared problem: the development of methods to treat the dynamics of quantum condensed phase systems.This volume collects the lectures delivered there. Due to the focus of the school, the contributions divide along natural lines into two broad groups: (1) the most sophisticated forms of the art of computer simulation, including biased phase space sampling schemes, methods which address the multiplicity of time scales in condensed phase problems, and static equilibrium methods for treating quantum systems; (2) the contributions on quantum dynamics, including methods for mixing quantum and classical dynamics in condensed phase simulations and methods capable of treating all degrees of freedom quantum-mechanically.
Author: Ludwig Kniel
Publisher:
ISBN:
Category :
Languages : en
Pages : 173
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Book Description
Author: I. Chorkendorff
Publisher: John Wiley & Sons
ISBN: 3527605649
Category : Science
Languages : en
Pages : 469
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Book Description
Until now, the literature has offered a rather limited approach to the use of fundamental kinetics and their application to catalytic reactions. Subsequently, this book spans the full range from fundamentals of kinetics and heterogeneous catalysis via modern experimental and theoretical results of model studies to their equivalent large-scale industrial production processes. The result is key knowledge for students at technical universities and professionals already working in industry. '... such an enterprise will be of great value to the community, to professionals as well as graduate and undergraduate students attempting to move into the field of modern catalysis and kinetics. I strongly recommend you publish this book based on the proposal.' - Prof. Dr. G. A. Samorjai, University of California 'Both authors are well respected specialists, with a very long record of original top-quality work and an international reputation. A book from these authors will be considered an authoritative piece of work, I definitely support this project and I am looking forward to use the book when published.' - Prof. Dr. D. E. Resasco, University of Oklahoma 'I wholly support the proposed project. The authors are very competent young colleagues and there is a real need for such a textbook' - Prof. Dr. G. Ertl, Fritz-Haber-Institut, Max-Planck-Gesellschaft, Berlin
Author: Clarence D. Chang
Publisher: Marcel Dekker
ISBN:
Category : Science
Languages : en
Pages : 154
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Book Description
