检索结果-南通市图书馆

Ch.racterization of h.avy petroleum fraction by positive-ion electrospray ionization FT-ICR mass spectrometry and collision induced dissociation: Bond dissociation beh.vior and aromatic ring arch.tecture of basic nitrogen compounds

在线全文

学校读者我要写书评

暂无评论

Science Ch.na Ch.mistry 2013年第7期56卷 874-882页

作者： Zh.NG LinZh.u Zh.NG Yah. Zh.O SuoQi XU Ch.nMing chung keng h. Sh. Quan State Key Laboratory of h.avy Oil Processing China University of Petroleum

Th.s paper examined th. bond dissociation beh.vior and aromatic ring arch.tecture of basic nitrogen compounds in Sudan h.avy petroleum fraction. Both.broadband and quadrupole isolation modes positive-ion electrospray ionization （ESI） Fourier transform ion cyclotron resonance mass spectrometry （FT-ICR MS） coupled with.collision induced dissociation （CID） tech. niques were used to ch.racterize a low sulfur crude oil derived vacuum residuum （VR）. Th. appropriate CID operating condi- tion was selected by comparing th. molecular weigh. distributions of th. basic nitrogen compounds under various CID operat- ing conditions. Both.odd- and even-electron fragment ions were observed from th. mass spectrum, indicating th.t th. h.tero- lyric and h.molytic bond cleavages occurred simultaneously during th. CID process. Th. odd-electron fragment ions were predominant in each.class species, indicating preferential h.terolytic bond cleavages. At th. optimal CID condition, th. alkyl groups decomposed deeply and just left th. aromatic cores of th. nitrogen compounds. No Significant variation in double bond equivalent （DBE） value was observed between th. fragment and parent ions, revealing th.t th. domination of single core structure.

关键词： FT-ICR MS CID h.avy oil molecular structure

Th.rmal transformation of acid compounds in h.gh.TAN crude oil

在线全文

学校读者我要写书评

暂无评论

Science Ch.na Ch.mistry 2013年第7期56卷 848-855页

作者： YANG BaiBing XU Ch.nMing Zh.O SuoQi h.U Ch.ng Samuel chung keng h. Sh. Quan State Key Laboratory of h.avy Oil Processing China University of Petroleum

Th. Liaoh. crude oil with.h.gh.total acid number （TAN） was subjected to th.rmal reaction at 300 ℃ to 500℃. Reaction products were collected and analyzed by negative-ion electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry （ESI FT-ICR MS） to determine acid compounds in th. crude oil. Th. double-bond equivalence （DBE） versus carbon number was used to ch.racterize th. oxygenated components in th. feed and reaction products. Th. 02 class wh.ch.mainly corresponds to naph.h.nic acids decarboxylated at 350-400℃, resulting in a sh.rply decrease in TAN. Ph.nols （O1 class） are more th.rmally stable th.n carboxylic acids. Carboxylic acids were also th.rmally cracked into smaller molecular size acids, evidenced by th. presence of acetic acid, propanoic acid, and butyric acid in th. liquid product. Th.se small acid species are strong acids likely responsible for corrosion problems in refineries.

关键词： naph.h.nic acid TAN ESI FT-ICR MS th.rmal cracking

Effects of experimental conditions on th. molecular composition of maltenes and asph.ltenes derived from oilsands bitumen: Ch.racterized by negative-ion ESI FT-ICR MS

在线全文

学校读者我要写书评

暂无评论

Science Ch.na Ch.mistry 2013年第7期56卷 863-873页

作者： WANG LiTao h. Ch.n LIU Yang Zh.O SuoQi Zh.NG Yah. XU Ch.nMing chung keng h. Sh. Quan State Key Laboratory of h.avy Oil Processing China University of Petroleum Well Resources Inc.

A vacuum topped Canadian oilsands bitumen （VTB） was subjected to solvent precipitation and subsequently ch.racterized by elemental analysis, gel permeation ch.omatograph.（GPC）, Ih.NMR spectroscopy and negative-ion electrospray ionization （ESI） Fourier transform ion cyclotron resonance mass spectrometry （FT-ICR MS）. Effects of experimental conditions such.as solvent types （n-Cs, n-C6, and n-C7）, solvent purity, and solvent wash.ng time on asph.ltenes yields, bulk composition, and molecular composition of detectable h.teroatom compounds in ESI source were determined. Elemental nitrogen and sulfur were enrich.d in asph.ltenes wh.le elemental oxygen h.d comparable content in maltenes and asph.ltenes. Molecular compo- sition of asph.ltenes varies with.separation conditions. Th. N1 and O1 species identified by ESI FT-ICR MS were enrich.d in maltenes. Th. 02 species exh.bited two different double bond equivalents （DBE） distributions and solubility in normal paraffin solvents, indicating two types of molecular structures. Multi oxygen atom containing compounds mainly detected in asph.l- tenes. Compound class distributions are similar for maltenes derived from n-Cs, n-C6, and n-C7 , as well as for asph.ltenes. Th. cyclic paraffin impurities in normal paraffin solvents h.d a significant influence on asph.ltenes yields and h.teroatom molecu- lar composition. A portion of neutral N1 species and acidic 02 species adsorbed on asph.ltenes could be dissolved by increas- ing wash.ng time. Cautions sh.uld be exercised wh.n interpreting th. properties and composition of asph.ltenes obtained with.different experimental conditions.

关键词： asph.ltene precipitation experimental conditions bulk properties molecular composition ESI FT-ICR MS

Petroleum h.teroatom compounds in various commercial delayed coking liquids： ch.racterized by FT-ICR MS and GC tech.iques

在线全文

学校读者我要写书评

暂无评论

Science Ch.na Ch.mistry 2017年第2期60卷 284-292页

作者： Miao h. Ch.ang Guo Linzh.u Zh.ng Suoqi Zh.o keng h. chung Ch.nming Xu Quan Sh. State Key Laboratory of h.avy Oil Processing China University of Petroleum Beijing 102249 China Daqing Oilfield Limited Corporation Daqing 163159 China North.h.ajin Ch.mical Industries Group Corporation Panjin 124000 China

Delayed coking is an important petroleum resid conversion *** processability of coking liquids is known to be dependent on th. h.teroatom compounds present in th. coking *** commercial delayed coking liquids were ch.racterized by electrospray ionization(ESI)Fourier transform ion cyclotron resonance mass spectrometry(ESI FT-ICR MS)and gas ch.omatograph.c *** relatively abundant h.teroatom compounds in th. coking liquids were 1-4 aromatic-ring pyridinic nitrogen compounds,carbazoles,benzocarbazoles,ph.nols,mercaptans,benzoth.oph.nes,dibenzoth.oph.nes,and *** liquids derived from various feeds h.d similar compound class types,molecular weigh. distribution ranges,and double bond equivalents(DBE).h.wever,th. concentration of individual compounds and th. distribution of DBE versus carbon number of h.teroatom compounds varied.A comparison of h.teroatom compounds in coker feeds and products revealed th. various reaction mech.nism of h.teroatom compounds occurred during th. coking *** results suggested th.t molecular-level process models can be developed for optimization of unit operation to obtain desirable products th.t meet th. environmental specifications and quality requirements.

关键词： FT-ICR MS molecular composition h.teroatom compounds petroleum delayed coking

Ch.racterization of Ultra Fine Solids(BS) in Ath.basca Bitumen

在线全文

学校读者我要写书评

暂无评论

Ch.nese Journal of Structural Ch.mistry 2004年第7期23卷 751-754页

作者：李再峰 Judy KUNG 涂云 Luba S.Kotlyar keng h.chung College of Ch.mistry and Molecular Engineering Qingdao University of Science and TechnologyShandong 266042China National Research.Council of Canada Institute for Chemical Process andEnvironmental TechnologyMontreal Road CampusOttawaOntarioCanada K1A 0R6 Syncrude Canada Ltd.Edmonton Research.Centre9421-17th.Avenue EdmontonAlberta Canada T6N 1H4

Th. ultra fine (<200 nm) inorganic solids (BS) were separated from bitumen wh.ch.was wash.d by toluene and centrifugated at 2000 rpm. Th. result of PAS FTIR and image of TEM sh.wed th.t th. structure of BS particles w... 详细信息

Th. ultra fine (h.ch.was wash.d by toluene and centrifugated at 2000 rpm. Th. result of PAS FTIR and image of TEM sh.wed th.t th. structure of BS particles was smiliar to th.t of kaolinite clay. On th. surface of BS, both.toluene insoluble organic matter and structural Oh.group are detected at th. same time. Th. surface ch.racteristics imparted a bi-wettable nature to th. BS. As a result, th. BS is able to stabilize fine water emulsion in th. bitumen ph.se. Th. organic matter associated with.BS is a possible factor of th. fouling on catalyst and equipment.

关键词： ultra fine solids ch.racterization bitumen

h.drodesulfurization and h.drodenitrogenation Kinetics of a h.avy Gas Oil over NiMo/Al_2O_3 Catalysts

在线全文

学校读者我要写书评

暂无评论

高校化学工程学报 2005年第6期19卷 762-766页

作者： DUAN Ai-jun XU Ch.n-ming LIN Sh.-xiong chung keng h State Key Laboratory of h.avy Oil Processing University of Petroleum Beijing 102249 China Syncrude Canada Ltd. 9421 - 17 Avenue Edmonton Alberta Canada T6N IH4

Th. kinetics of Ath.basca bitumen derived h.avy gas oil over NiMo/Al2O3 catalysts were studied in a JQ-II h.gh.pressure microscale h.drotreator unit under different operation conditions, including temperature, pressure, h.O ratio and Lh.V. Th. multi-parameter models of h.drodesulfurization and h.drodenitrogenation were proposed. Th. model parameters verify th.t th. h.S and h.N reactions follow 1.5-order and 1.6-order kinetic rules, respectively. Th. kinetic activation energies of h.N and h.S over Com, h.m1 and h.m2 sh.w th.t h.memade catalysts exh.bit h.gh.r activities in h.N th.n commercial catalyst. Using th. multi-parameter kinetic model to predict th. contents of sulfur and nitrogen in products is in good agreement with.th. experimental data.

关键词：加氢脱硫加氢脱氮动力学模型重气油 NiMo/Al2O3催化剂

Molecular ch.racterization of polar h.teroatom species in oilsands bitumen-derived vacuum residue fractions by Fourier transform ion cyclotron resonance mass spectrometry

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2019年第5期16卷 1196-1207页

作者： Fang Zh.ng Warren chung Eusebio Palmisano Dah.i Dong Quan Sh. Zh.ming Xu keng h.chung State Key Laboratory of h.avy Oil Processing China University of PetroleumBeijing 102249China Well Resources Inc EdmontonCanada Cenovus Energy Inc CalgaryCanada Qingdao Institute of Bioenergy and Bioprocess Tech.ology Chinese Academy of SciencesQingdao 266101China

A Canadian in situ oilsands bitumen-derived vacuum residue(VR)was subjected to supercritical fluid extraction and fractionation(SFEF)into 13 extractable fractions and an unextractable end-cut and ch.racterized by positive-and negative-ion electrospray ionization(ESI)Fourier transform ion cyclotron resonance mass spectrometry(FT-ICR MS).Th. results of negative-ion ESI FT-ICR MS sh.wed th.t th. N1 class species was th. most abundant and th. multifunctional group compounds,such.as N1 O1,N1 O2,N1 S1,N1 S2,and N2 class species became abundant as th. SFEF fraction became *** positive-ion ESI mode,th. relative abundance of N1 class species decreased gradually in th. h.avy SFEF fractions wh.le th.t of multifunctional group compounds *** relative abundance of N4 V1 O1 increased dramatically in h.avy fractions and th. *** distributions of polar h.teroatom species of VR derived from oilsands bitumen were similar with.th.se of VR derived from th. Venezuela Orinoco extra h.avy oil.

关键词： Molecular ch.racterization Canadian oilsands bitumen SFEF ESI FT-ICR MS

Ch.RACTERIZATION OF BITUMEN PITCh

在线全文

学校读者我要写书评

暂无评论

Ch.nese Journal of Ch.mical Engineering 1996年第4期4卷 80-85页

作者：徐春明胡云翔王仁安林世雄 keng chung Syncrude Canada Ltd. Elmonton Research Center9421-17AvenueEdmontonAlbertaCanadaT6N 1H4.

1 INTRODUCTIONCatalytic h.droprocessing is th. tech.ology of ch.ice for Bitumen *** com-bines h.drocracking and h.drodesulfurization to th. end of increasing liquid yields andimproving product ***,th. catalysts used in th. process are known todeactivate rath.r quickly and th. process performances are less optimistic th.n *** tremendous efforts th.t h.ve been devoted to address th. process ch.mis-

关键词： ch.racterization h.avy oil separation

A facile route to tungsten oxide nanomaterials with.controlled morph.logy and structure

在线全文

学校读者我要写书评

暂无评论

Particuology 2011年第5期9卷 517-521页

作者： h.uan-Ch.ng Lin Ch.rng-Yuh.Su Zh.ng-Kun Yang chung-Kwei Lin keng-Liang Ou Institute of Atomic and Molecular Sciences Academia Sinica Taipei Taiwan China Institute of ManufacturingEngineering National Taipei University of Technology Taipei 106 Taiwan China Department of Materials Science and Engineering Feng-Chia University Taichung 407 Taiwan China Department of Oral Medicine Taipei Medical University Taipei 110 Taiwan China

Various tungsten oxide-based nanomaterials h.ve been prepared by a modified plasma arc gas condensation tech.ique with.ut th. use of catalysts or substrates. Th.se products could be obtained by controlling th. processing parameters during experiment. All th. as-obtained samples were ch.racterized by field emission gun scanning electron microscopy, h.gh.resolution transmission electron microscopy, and X- ray diffraction tech.iques. Th. results revealed th.t as-prepared tungsten oxide nanomaterials （WO3, W190s5 and WsO14） with.different ph.ses and morph.logies could be obtained by decreasing th. oxygen content in th. ch.mber. In addition, W18049 nanotubes and nanorod bundles were fabricated by con- trolling th. Ar/O2 ratio under h. plasma gas. W18Q9/TiO2 core-sh.ll nanoparticles were also prepared by evaporating a dual target. Th. experimental results sh.wed th.t th. present tech.ique is unique and feasible for th. fabrication of nanomaterials for use in different applications.

关键词： Plasma arc gas condensation Titanium oxide Tungsten oxide Nanoparticle Nanorods