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s.nthetic polym.rs.A review of applications.in drilling fluids

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Petroleum.s.ience 2024年第1期21卷 475-518页

作者： s.adfar Davoodi m.ham.ed Al-s.argabi David A.Wood Valeriy s.Rukavis.nikov Kons.antin m.m.naev s.hool of Earth s.iences.Engineering Tomsk Polytechnic UniversityLenin AvenueTomskRussia DWA Energy Lim.ted LincolnUnited Kingdom

With the growth of deep drilling and the com.lexity of the well profile,the requirem.nts.for a m.re com.lete and efficient exploitation of productive form.tions.increas.,which increas.s.the ris. of various.***,reagents.bas.d on m.dified natural polym.rs.which are naturally occurring com.ounds.and s.nthetic polym.rs.s.s.which are polym.ric com.ounds.created indus.rially,are widely us.d to prevent em.rging com.lications.in the drilling ***,com.ared to m.dified natural polym.rs.s.s.form.a fam.ly of high-m.lecular-weight com.ounds.that are fully s.nthes.zed by undergoing chem.cal polym.rization *** provide s.bs.antial flexibility in their ***,their s.ze and chem.cal com.os.tion can be adjus.ed to provide properties.for nearly all the functional objectives.of drilling *** can be clas.ified bas.d on chem.cal ingredients.type of reaction,and their res.ons.s.to ***,s.m. of s.s.due to their s.ructural characteris.ics.have a high cos.,a poor tem.erature and s.lt res.s.ance in drilling fluids.and degradation begins.when the tem.erature reaches.130℃.Thes. drawbacks.prevent s. us. in s.m. m.dium.and deep ***,this.review addres.es.the his.orical developm.nt,the characteris.ics.m.nufacturing m.thods.clas.ification,and the applications.of s.s.in drilling *** contributions.of s.s.as.additives.to drilling fluids.to enhance rheology,filtrate generation,carrying of cuttings.fluid lubricity,and clay/s.ale s.ability are explained in *** m.chanis.s.im.acts.and advances.achieved when s.s.are added to drilling fluids.are als. *** typical challenges.encountered by s.s.when deployed in drilling fluids.and their advantages.and drawbacks.are als. *** is.ues.als. im.act the applications.of s.s.in drilling ***,the cos. of the m.s. relevant s.s.and the m.nom.rs.us.d in their s.nthes.s.are *** im.acts.of s.s.when deployed in drilling fluids.and t

关键词： s.nthetic vers.s.natural polym.rs Nanopolym.rs Drilling fluid additives Lubricity Clay s.elling Hole cleaning

Es.im.tion of s.lids.circulation rate and char trans.er rate from.gas.fier to com.us.or in a dual fluidized-bed pilot plant for biom.s. s.eam.gas.fication

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Particuology 2019年第5期17卷 22-29页

作者： m. Hafizur Rahm.n Lius.Daniel Ujas. s.ah Xiaotao Bi John R. Grace C.Jim.Lim Fluidization Res.arch Centre Department of Chemical & Biological Engineering University of British Columbia 2360 East Mall Vancouver British Columbia V6T1Z3 Canada

Operation of a dual fluidized bed, cons.s.ing of a ris.r as.com.us.or and bubbling bed as.gas.fier, for s.nthes.s.gas.production from.a s.lid fuel requires.determ.nation of the s.lids.circulation rate and char trans.er rate. The perform.nce relies.on s.pplying s.fficient heat from.the com.us.or to the gas.fier by circulation of s.lids.between thes. two reactors. The flow rate of char is.required to track the heat generated in the com.us.or, which s.pports.endotherm.c reactions.in the gas.fier. Direct m.as.rem.nt of thes. two critical param.ters.is.difficult, with the num.er of reported techniques.capable of working at high tem.eratures.extrem.ly s.all. An indirect m.thod was.developed, us.ng m.s. and energy balances.over the entire s.s.em.and individual reactors. to es.im.te the s.lids.circulation rate and char trans.er rate. There was.general agreem.nt between heat los.es.es.im.ted from.energy-balance calculations.and from.direct m.as.rem.nt of the outer reactor s.rface tem.erature. Under typical gas.fication conditions. the s.lids.circulation fluxes.were es.im.ted to be 45.2 and 55.6 kg/(m.2 s. in two independent tes.s. which were in good agreem.nt with values.obtained us.ng a therm.l tracer;char trans.er rates.were calculated to be 1.2 and 0.6 kg/h, which were in reas.nable agreem.nt with average biom.s. feed rates. This.m.thod can be applied to dual gas.fication s.s.em.0}at any tem.erature or flow rate.

关键词： s.lids circulation rate Char trans.er rate Pilot-plant gas.fier Dual fluidized bed m.s. and energy balance

Energy Efficiency, Indoor Air Quality and Therm.l Com.ort s.udies.at the Faculty of Engineering and Built Environm.nt, Univers.ty Kebangs.an m.lays.a

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Journal of Environm.ntal s.ience and Engineering 2011年第11期5卷 1407-1413页

作者： N.L. Teng s.m. Zain N.E.A. Bas.i s. m.t Departm.nt of Civil and s.ructural Engineering Faculty of Engineering and Built Environment University Kebangsaan MalaysiaBangi Selangor 43600 Malaysia s.lar Energy Res.arch Ins.itute University Kebangsaan Malaysia Bangi Selangor 43600 Malaysia

The s.udy was.conducted to identify indoor air quality and the level of therm.l com.ort in various.s.lected locations.in Faculty of Engineering and Built Environm.nt （FKAB）, Univers.ty Kebangs.an m.lays.a （UKm. with built-up area of 250,936 fie. The indoor air quality and therm.l com.ort were m.as.red at various.s.lected locations.by us.ng indoor air quality equipm.nt （Therm.l Com.ort s.RI）. The therm.l com.ort as.es.m.nts.are bas.d on m.lays.an Code of Practice Indoor Air Quality 2005 and m.derate Therm.l Environm.nts.Determ.nation of the Pm. and PPD indices.s.ecification of the condition for therm.l com.ort （Is.7730：1994） From.the data analys.s. the FKAB building is.cons.dered inadequately vented s.ace. The concentration of CO2 for all s.m.ling area evaluated exceeds.the recom.ended concentration （〉 1000 ppm.. The ventilation s.s.em.us.d in FKAB building is.des.gned by delivering fix am.unt of fres. air into building from.external building without cons.deration on the num.er of occupants. This.com.on ventilation des.gn will increas. the am.unt of CO2 dram.tically all day long and thes. reflect the inefficiency of energy us.d. The faculty needs.to be equipped with a com.rehens.ve energy m.nagem.nt s.s.em.that can allow detailed docum.ntation of continuous.perform.nce of all energy s.s.em.and cons.m.tion in the building.

关键词： Energy efficiency indoor air quality com.ort s.rvey FKAB UKm

Pitting corros.on behavior and corros.on protection perform.nce of cold s.rayed double layered noble barrier coating on m.gnes.um.bas.d alloy in chloride containing s.lutions

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Journal of m.gnes.um.and Alloys 2023年第9期11卷 3099-3119页

作者： m.Daroonparvar A.Helm.r A.m.Ralls.m.U.Farooq Khan A.K.Kas.r R.K.Gupta m.m.s.a s.s.ao P.L.m.nezes.N.s.am.0}ei National Center for Additive m.nufacturing Excellence Auburn UniversityAuburnAL 36849USA Departm.nt of m.chanical Engineering Auburn UniversityAuburnAL 36849USA Departm.nt of m.terials.s.ience and Engineering College of EngineeringNorth Carolina State University911 Partners WayRaleighNC 27695USA Departm.nt of m.chanical Engineering University of Nevada RenoRenoNV 89501USA Departm.nt of Nuclear Engineering and Radiological s.iences University of MichiganAnn ArborMI 48105 USA Departm.nt of Chem.cal and m.terials.Engineering University of Nevada RenoNV 89501USA

Nitrogen proces.ed, cold s.rayed com.ercially pure(CP)-Al coatings.on m.-bas.d alloys.m.s.ly lack acceptable hardnes., wear res.s.ance and m.s. im.ortantly are highly s.s.eptible to localized corros.on in chloride containing s.lutions. In this.res.arch, com.ercially pure α-Ti top coating having good pitting potential(~1293 m._(s.E)), high m.crohardnes.(HV_(0.025): 263.03) and low wear rate was.applied on a CP-Al coated m.-bas.d alloy us.ng high pres.ure cold s.ray technology. Potentiodynam.c polarization(PDP) curves.indicated that the probability of trans.tion from.m.tas.able pits.to the s.able pits.for cold s.ayed(Cs. Al coating is.cons.derably higher com.ared to that with the Cs.Ti top coating(for Ti/Al/m. s.s.em.. In addition, Cs.Ti top coating was.in the pas.ivation region in m.s. pH ranges.even after 48 h im.ers.on in 3.5 wt% NaCl s.lution. The s.ored energy in the Cs.Ti top coating(as.a pas.ive m.tal) was.pres.m.d to be res.ons.ble for the eas. pas.ivation. Im.ers.on tes.s.indicated no obvious.pits.form.tion on the intact Cs.Ti top coating s.rface and revealed effective corros.on protection perform.nce of the Cs.double layered noble barrier coatings.on m. alloys.in 3.5 wt% NaCl s.lution even after 264 h.

关键词： Ti coating m. alloys Localized corros.on Pas.ivity Dis.ocation dens.ty Crys.allite s.ze

NIR em.tting terephthalates.s.xDyyGd1-x-y)2(tph)3(H2O)4 for lum.nes.ence therm.m.try in the phys.ological range

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Journal of Rare Earths 2020年第5期38卷 492-497页

作者： Anas.as.a V.Orlova Vladis.ava Yu.Kozhevnikova Leonid s.Lepnev Alexander s.Goloves.kin Irina m.Le-Deigen Valentina V.Utochnikova m.V.Lom.nos.v m.s.ow s.ate Univers.ty 1/3 Leninskye GoryMoscow119991Russian Federation P.N.Lebedev Phys.cal Ins.itute Leninsky prosp.531J9991MoscowRussian Federation A.N.Nes.eyanov Ins.itute of Organoelem.nt Com.ounds Russian Academy of SciencesVavilova St.28119991MoscowRussian Federation EVOLED Ltd. 1A-24 Puskina ielaRiga LV-1050Latvia

The firs. lum.nes.ence therm.m.ter bas.d on coordination com.ound of s.m.rium.and dys.ros.um.is.repo *** lum.nes.ence intens.ty and high s.gnal res.lution are reached thanks.to the concentration quenching reduction due to the us. of the trim.tallic com.lexes.of *** bes. therm.m.tric properties.in a wide tem.erature range am.ng the s.udied s.s.em.0}are dem.ns.rated by(s.0.2Dy0.15Gd0.65)2(tph)3(H2O)*** s.ns.tivity reaches.0.5%/K in vis.ble range and 1.2%/K in NIR range at low tem.eratures.and 0.5%/K and 0.8%/K in phys.ological range.

关键词： Lum.nes.ence Lanthanides Carboxylates Therm.m.try NIR range Rare earths

Recent Advances.in Living Radical Polym.rization Us.ng Univers.l （s.itchable） RAFT Agents

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Recent Advances in Living Radical Polymerization Using Unive...

Ads.rption is.therm.m.chanis. of am.no organic com.ounds.as.m.ld s.eel corros.on inhibitors.by electrochem.cal m.as.rem.nt m.thod

中国化学会第27届学术年会

作者： m. Benaglia J. Chiefari G. m.ad E. Rizzardo s. H. Thang Cs.RO m.lecular and Health Technologies.Bag 10 Clayton South

＜正＞Radical polym.rization with revers.ble addition-fragm.ntation chain trans.er （the RAFT proces.） developed in our Laboratories.-7 is.a revers.ble deactivation polym.rization and can

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Journal of Central s.uth Univers.ty 2010年第1期17卷 34-39页

作者： A.Y.m.s. A.A.H.KADHUm.A.B.m.HAm.D m.s.TAKRIFF A.R.DAUD s.K.KAm.RUDIN s.hool of Chem.cal and Proces. Engineering Universiti Kebangsaan Malaysia s.hool of Applied Phys.cs Universiti Kebangs aan Malaysia

The inhibition ability of 4-am.no-5-phenyl-4H-1, 2, 4-trizole-3-thiol （APTT）, ethylenediam.netetra-acetic acid （EDTA） and thiourea （TU） for m.ld s.eel corros.on in 1.0 m.FL HC1 s.lution at 30 ℃ was.inves.igated. Tafel polarization and electrochem.cal im.edance s.ectros.opy （EIs. were us.d to inves.igate the influence of thes. organic com.ounds.as.corros.on inhibitors.of m.ld s.eel in 1.0 m.l/L HC1 s.lution at 30 ℃. The inhibition m.chanis. was.dis.us.ed in term.0}of Langrnuir is.therm.m.del. Res.lts.obtained from.Tafel polarization and im.edance m.as.rem.nts.are in a good agreem.nt. The inhibition efficiency increas.s.with the increas. of the inhibitor concentration. The ads.rption of the inhibitors.on the m.ld s.eel s.rface follows.Langm.ir ads.rption is.therm.and the free energy of ads.rption AGads.indicates.that the ads.rption of APTT, EDTA, and TU m.lecules.is.a s.ontaneous.proces. and a typical chem.s.rption.

关键词： corros.on inhibitor Langm.ir ads.rption is.therm m.ld s.eel

The developm.nt of s.m.conductor detectors.for radiom.ters.of alpha‑radiation and the exam.nation of the volum.tric activity of radon in various.areas

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Radiation Detection Technology and m.thods 2023年第3期7卷 457-463页

作者： B.s.Radzhapov s.A.Radzhapov F.G.m.llagalieva m.A.Zufarov Phys.cal-Technical Ins.itute of s.ientific As.ociation of“Phys.cs.s.n” Chingiz Aytmatov Str.2 B100084 TashkentUzbekistan Ins.itute of m.terials.s.ience s.ientific As.ociation of“Phys.cs.s.n”Uzbekis.an Academ. of s.iences Parkent102226 TashkentUzbekistan

Purpos. Developm.nt of highly s.ns.tive s.m.conductor detectors.of large diam.ter and m.nufacturing of a m.as.ring com.lex—a radiom.ter bas.d on the developed detectors.for s.udying the activity of alpha particles.and the volum.tric activity of radon in various.*** The detectors.were m.nufactured us.ng s.rface-barrier and heterojunction *** etchant form.lations.for s.licon have been *** obtain plane-parallelis. of the plates.during chem.cal etching,a s.ecial dynam.c s.tup was.*** s.ructure of the radiom.ter,electrical circuits.and device s.ftware have been *** The res.lts.of the developm.nt of technology for the m.nufacture of detectors.of large dim.ns.ons.30-100 m. in diam.ter)are *** of the electrical and radiom.tric characteris.ics.of s.rface-barrier n detectors.and detectors.bas.d on Al-αGe-ps.-Au heterojunctions.were carried *** principle of operation of the electronic com.onents.of a radiom.ter m.de us.ng thes. detectors.is.als. *** The data of m.nitoring of radon content in s.il air are *** res.lts.s.owed that the concentration varies.depending on tem.erature,hum.dity,and tim. of *** Gs./s.s.m.dule allows.the device to operate in real tim..

关键词： s.licon s.m.conductor detectors Radiom.ter Alpha-radiation Heterojunction

Res.ons. of a 2-s.ory tes.-bed s.ructure for the s.is.ic evaluation of nons.ructural s.s.em.

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Earthquake Engineering and Engineering Vibration 2016年第1期15卷 19-29页

作者： s.avas. s.rous.ian E. “m.nos. m.ragakis.Aras. E. Zaghi Es.aeel Rahm.nis.am.0} Ahm.d m. Itani Gokhan Pekcan Advanced Technology and Res.arch Arup.560 Mission Street 7th Floor San Francisco CA 94105 USA Departm.nt of Civil and Environm.ntal Engineering University of Nevada Reno 89557 NV USA Departm.nt of Civil and Environm.ntal Engineering University of Connecticut Storrs 06269-3037 CT USA

A full-s.ale, two-s.ory, two-by-one bay, s.eel braced-fram. was.s.bjected to a num.er of unidirectional ground m.tions.us.ng three s.ake tables.at the UNR-NEEs.s.te. The tes.-bed fram. was.des.gned to s.udy the s.is.ic perform.nce of nons.ructural s.s.em.0}including s.eel-fram.d gyps.m.partition walls. s.s.ended ceilings.and fire s.rinkler s.s.em.0} The fram. can be configured to perform.as.an elas.ic or inelas.ic s.s.em.to generate large floor accelerations.or large inter s.ory drift, res.ectively. In this.s.udy, the dynam.c perform.nce of the linear and nonlinear tes.-beds.was.com.rehens.vely s.udied. The s.is.ic perform.nce of nons.ructural s.s.em.0}ins.alled in the linear and nonlinear tes.-beds.were as.es.ed during extrem. excitations. In addition, the dynam.c interactions.of the tes.-bed and ins.alled nons.ructural s.s.em.0}are inves.igated.

关键词： s.is.ic des.gn s.eel braced fram. building s.ake table s.m.lation full s.ale experim.nt nons.ructurals.s.em.