Download or read book Development of Unique Catalysts for Hydrodenitrogenation of Coal derived Liquids Annual Report September 15 1978 September 14 1979 written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Preliminary results from decahydroquinoline hydrodenitrogenation runs show that Bronsted acidity by itself will not catalyze carbon-nitrogen bond scission. The C-N bond cleavage must therefore be catalyzed by an active site, which consists of a transition metal ion in close proximity to an acid site. It appears that hydrodenitrogenation requires both an acidic and a basic site for the Hoffman E2 elimination reaction to occur. Several catalysts have been prepared and tested, including Bronsted and Lewis acid catalysts without metal, and silica-alumina and .gamma.-alumina impregnated with molybdenum, vanadium, nickel or iron. Our results show that the nitrogen removal rate was highest for molybdenum on .gamma.-alumina catalyst and the rate decreased with lower Mo concentrations. Aluminum borate and aluminum borate phosphate catalysts (with or without nickel) were prepared to develop novel catalysts that would selectively coordinate the nitrogen atom and remove it without excessive hydrogenation. Results show that the support plays an important role in the nitrogen-removal process. Hydrodenitrogenation of aniline has been studied over a presulfided Ni-Mo/.gamma.-Al2O3 catalyst, and a reaction network has been proposed. Aniline hydrodenitrogenation appears to involve partial hydrogenation of the benzene ring to reduce aromatic resonance with the nitrogen atom, thus reducing the C-N bond strength and facilitating NH3 elimination.
Download or read book Development of Unique Catalysts for Hydrodenitrogenation of Coal derived Liquids Annual Report September 15 1979 September 15 1980 written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrodenitrogenation of quinoline and decahydroquinoline has been studied employing several catalysts: Bronsted and Lewis acid catalysts without metal, and silica-alumina, .gamma.-alumina and magnesia impregnated with molybdenum, tungsten, nickel or cobalt. Our results show that nitrogen removal rate was highest for molybdenum on alumina and tungsten on silica-alumina or alumina catalysts. Nitrogen abstraction using .gamma.-alumina support is considerably faster than with magnesia support. Several catalysts have been prepared and tested, with the emphasis on understanding the role of acidity in the carbon-nitrogen bond scission reaction. Hydrodenitrogenation of quinoline has been studied by using Ni, Mo/chlorided or fluorided alumina catalysts, with various halide concentrations. Preliminary results from this study indicate that halogenation of .gamma.-alumina catalysts slightly enhanced the hydrogenolysis activity but showed little effect on the hydrogenation activity. Initial results from phenothiazine hydroprocessing show that carbon-sulfur bonds in the reactant are broken much faster than the carbon-nitrogen bonds. Data relevant to this reaction are being evaluated, utilizing kinetic analysis to give quantitative rates of C-N and C-S bond scission and the extents and rates of hydrogenation. Note: this report contains 5th, 6th, 7th and 8th quarterly reports.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1981 with total page 1634 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Unique Catalysts for Hydrodenitrogenation of Coal derived Liquids written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fossil Energy Update written by and published by . This book was released on 1981 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Unique Catalysts for Hydrodenitrogenation of Coal derived Liquids written by James Robert Katzer and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1983 with total page 1378 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index Keyword A L written by and published by . This book was released on 1982 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1983-02 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Catalysts for Upgrading Coal derived Liquids written by Billy L. Crynes and published by . This book was released on 1983 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Unique Catalysts for Hydrodenitrogentation of Coal derived Liquids written by James Robert Katzer and published by . This book was released on 1980 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Survey of Catalysts for the Hydrodenitrogenation of Coal derived Liquids written by Carol Jean Payne and published by . This book was released on 1977 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Catalysts for Upgrading Coal derived Liquids written by Billy L. Crynes and published by . This book was released on 1978 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Catalysts for Upgrading Coal derived Liquids Quarterly Report July 1 September 30 1980 written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Data on the HDN-30 and the Ketjenfine-124 catalysts not previously reported are given. These data show pore properties and reveal that the Ketjenfine catalyst has a most frequent pore diameter at about 50 angstroms and that of the HDN-30 catalyst at about 80 angstroms. A comparative figure revealed that no difference existed in nitrogen removal for over 120 hours of catalyst-oil contact for these two catalysts and for a reactor bed consisting of a 50 volume percent mixture of each. The Catalyst Life Test Unit was modified to improve the feed control. Two high pressure feed tanks were installed which allow improved feed-pump performance while operating with preheated, heavy feedstocks. Analytical methods were developed for the scanning electron microscope and atomic absorption to assess more detailed analysis of catalysts properties and metals content of the oils. One experimental run was conducted using the HDN-30(Ni-Mo-Al2O3) catalyst and a feedstock consisting of 10% (vol) Synthoil II and 90% Raw Anthracene Oil. This experiment was conducted at nominal conditions of 1500 psig, 427 C and with a liquid volume hourly space time of 2.74 hours. The run duration was 103 hours of liquid-catalyst contact. Only partial results were available; all will be given in the subsequent quarterly report. Sulfur removal was noted to be 75 to 83%.
Download or read book Investigation of Sulfur tolerant Catalysts for Selective Synthesis of Hydrocarbon Liquids from Coal derived Gases Annual Technical Progress Report September 19 1979 September 18 1980 written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Twelve supported iron and cobalt catalysts were prepared, including three boride-promoted catalysts, by a procedure developed previously in this laboratory. Each was characterized by H2 and CO chemisorption measurements. Construction and testing of a high pressure laboratory microreactor system were completed. The system features a 0.65 cm tubular reactor, ice-temperature liquid traps, and a gas chromatograhic system for complete product analysis. Eight catalysts were tested at 90 kPa, 450 to 500°K H2/CO = 2 to obtain product distribution, selectivity, and turnover number data. The results show that supports and promoters significantly affect specific activity and product selectivity of iron and cobalt in CO hydrogenation.
Download or read book Development of New Catalysts for Coal liquids Refining First Quarterly Report 1 January 1979 31 March 1979 written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Two existing hydrotreating units were redesigned to increase their operating range, and the necessary parts ordered. A new microactivity testing (MAT) unit was designed, and the parts ordered. Base-line testing procedures were improved, and the effect of unit parameters on catalytic activity was studied with borrowed Filtrol testing units. Synthesis and characterization of various catalytic components and matrix modifications was carried out. Sodium-Y zeolites with different silica-alumina ratios and different crystal sizes are being synthesized. Synthetic montmorillonite micas (SMM) in the ammonium (SMM-NH4) form have been prepared with silica-alumina ratios from 2.16 to 2.58, and cation exchanged with Co and Ni. Lattice-substituted SMM (SMM-M) have been prepared on a laboratory scale with Ni/sup 2 +/, Co/sup 2 +/, and Fe/sup 3 +/ substituted for Al/sup 3 +/ in the octahedral coordination position. A series of relatively large pore size alumina supports with varying pore size distributions, and good strengths, have been prepared. These alumina supports have been made into hydrotreating catalysts by impregnation with different concentrations of CoO/MoO3 and NiO/MoO3.
Download or read book Coal Liquefaction Catalyst Development written by United States. Department of Energy and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
