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Title: Development of platinum-loaded Y-type zeolite catalysts for high efficiency conversion of biomass-derived carbohydrates to hydrogen.

Authors:
 [1]
  1. (New Mexico Institute of Mining and Technology, Socorro, NM)
Publication Date:
Research Org.:
Sandia National Laboratories
Sponsoring Org.:
USDOE
OSTI Identifier:
903424
Report Number(s):
SAND2007-1905
TRN: US200722%%124
DOE Contract Number:
AC04-94AL85000
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; 09 BIOMASS FUELS; 10 SYNTHETIC FUELS; 29 ENERGY PLANNING, POLICY AND ECONOMY; BIOMASS; CARBOHYDRATES; CATALYSTS; EFFICIENCY; FOSSIL FUELS; HYDROGEN; ORGANIC WASTES; ZEOLITES; Environmental Sciences-Biomass Energy & Biofuels; Biomass energy.; Organic compounds.; Biomass conversion.; Organic wastes.

Citation Formats

Monroe, Justin. Development of platinum-loaded Y-type zeolite catalysts for high efficiency conversion of biomass-derived carbohydrates to hydrogen.. United States: N. p., 2007. Web. doi:10.2172/903424.
Monroe, Justin. Development of platinum-loaded Y-type zeolite catalysts for high efficiency conversion of biomass-derived carbohydrates to hydrogen.. United States. doi:10.2172/903424.
Monroe, Justin. Thu . "Development of platinum-loaded Y-type zeolite catalysts for high efficiency conversion of biomass-derived carbohydrates to hydrogen.". United States. doi:10.2172/903424. https://www.osti.gov/servlets/purl/903424.
@article{osti_903424,
title = {Development of platinum-loaded Y-type zeolite catalysts for high efficiency conversion of biomass-derived carbohydrates to hydrogen.},
author = {Monroe, Justin},
abstractNote = {},
doi = {10.2172/903424},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 2007},
month = {Thu Mar 01 00:00:00 EST 2007}
}

Technical Report:

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  • We have been studying the hydrocracking of polyaromatic compounds over Ni-loaded zeolite catalysts (ZSM-5, mordenite, and Y-type) and found the fact that pore size of zeolite exerts an interesting effect on product distribution. In this study, we have conducted the hydrocracking of pyrene using Pd-modified Ni-loaded Y-type zeolite as catalyst. Addition of Pd-metal activated Ni-loaded Y-type zeolite at a great extent. 100% conversion of pyrene was attained under milder conditions like at 325{degrees}C for 1 h (H{sub 2} 70 kg/cm{sup 2}) while Ni-loaded Y-type zeolite can attain 100% conversion at 350{degrees}C for 1 h. Detailed analysis of product distribution suggestedmore » us to apply this catalyst for the hydrodesulfurization of dibenzothiophene. We have conducted hydrocracking of dibenzothiophene at 300{degrees}C for 1 h and found that almost all of dibenzothiophene was hydrocracked while both Ni-loaded Y-type zeolite and Pd-loaded Y-type zeolite show about 10-15% of starting materials remained. This result clearly indicates that modifier Pd-metal shows a kind of synergy for hydrodesulfurization of dibenzothiophene.« less
  • Experiments were conducted in 2003 and 2004 with protium and deuterium to demonstrate the hydrogen exchange properties of various catalyzed zeolites for tritium stripping purposes. A column was loaded with the experimental material and purged with either H{sub 2} or D{sub 2} as shown in Figure 1 and the effluent monitored with a Prisma Quadrupole. The purge gas was switched when the column outlet concentrations reached >95% of the purge isotope. Outlet concentrations were calculated as the sum of the purge isotope in the elemental form plus the purge isotope in the oxide form (the purge stream was humidified asmore » it passed through the column) divided by the total hydrogen isotopes in the effluent. 1.5 wt.% Pt on CBV 780 zeolite, manufactured by Zeolist International, had the best exchange characteristics, high capacity and fast kinetics, of the materials tested. This memorandum describes an approach to extrapolate previously unpublished hydrogen for deuterium exchange data collected earlier on 1.5 wt.% Pt on CBV 780 to lower concentrations for potential engineering applications.« less
  • No abstract prepared.
  • Coal tar obtained from coal carbonization is a treasure of polyaromatic hydrocarbons, where more than 400 kinds of aromatic compounds are found to be contained. The development of new catalysts being able to convert these aromatics into mono or diaromatic compounds is one of objectives for utilization of polyaromatics. Hydrocracking of polyaromatic compounds is believed to proceed via formation of terminal-naphthenic ring of starting aromatic compounds, followed by cleavage of the naphthenic ring to produce alkylated aromatic compounds which has less numbers of ring than starting aromatics. Accordingly, hydrogenation of aromatic rings and cracking of resulting naphthenic rings are keymore » steps of hydrocracking reaction, so that dual functional catalysts such as metal-supported acid catalysts are considered to be one of the best catalysts. Zeolite has controlled pore structures and strong acidity enough to crack naphthenic rings, being characteristics in exchanging metal species with ease. We have been studying the hydrocracking of polyaromatic compounds over Ni-loaded zeolite catalysts (ZSM-5, mordenite, and Y-type) and found the fact that pore size of zeolite exerts an interesting effect on product distribution. We also conducted computer-simulation for diffusion phenomena of the polyaromatic hydrocarbons in the pore of these zeolites and found that diffusion ability of the substrate affects strongly the product distributions Recently we found that modifying of Ni-loaded Y-type zeolite by Pd-loading enhanced hydrocracking ability of the catalyst. In this report, we would like to refer to the results of both hydrocracking reaction of pyrene and hydrodesulfurization of dibenzothiophene using Pd-modified Ni-loaded Y-type zeolite.« less