lentsoe la sehlooho

Peterole; Li-additives; Aniline; Chromatography ea khase;

1. selelekela Ka lebaka la thibelo ea matla a peterole ea lapeng le theknoloji ea tlhoekiso, lihlahisoa tsa oli tse hlahisoang ke lihloekisi tse tloaelehileng 'marakeng lia haella, e leng se etsang hore palo e kholo ea lihlahisoa tsa oli e tsoakiloeng li tlala 'maraka. Hangata peterole e tsoakiloeng e kopantsoe le naphtha e nkhang hamonate (oli e bobebe) joalo ka lisebelisoa tse tala. Leha ho le joalo, ka morao ho theko e phahameng ea lihlahisoa tse tala le ho eketsa phaello, metsoako ea aniline e atisa ho sebelisoa e le li-additives tse sa tloaelehang tsa peterole. E le ho etsa hore index ea boleng ba peterole e nang le li-additives tse joalo li kopane le maemo a naha ea koloi ea peterole, mohlala, ho eketsa 1% (karolo ea boima) N-methylaniline e ka eketsa palo ea octane ka li-unit tse 2-4 [1]. Leha ho le joalo, li-additives tsa aniline li na le likotsi tse ka 'nang tsa e-ba kotsi ho motsamao le polokeho ea likoloi,' me N-methylaniline ke metsoako e nang le naetrojene, e leng se tla lebisa ho eketseha ha li-oxide tsa nitrogen ho tsoa ha likoloi, ho baka liphello tse kotsi tikolohong ea sepakapaka le bophelo bo botle ba batho. . Likarolo tse ka sehloohong tsa li-additives tsa aniline li kenyelletsa aniline, N-methylaniline, o-methylaniline, p-methylaniline, m-methylaniline le N, n-dimethylaniline. Hona joale, mekhoa e tloaelehileng e tlalehiloeng bakeng sa ho lemoha metsoako ea methylaniline e kenyelletsa naphthalene diethylamine spectrophotometry, khase chromatography-nitrogen chemiluminescence discovery, high performance liquid chromatography, joalo-joalo [2-4]. Mokhoa oa setso oa naphthalene diethylamine spectrophotometry o kena-kenana le sephetho sa boikemisetso ka lebaka la ketsahalo ea karabelo ea lehlakore, 'me mokhoa oa HPLC o ameha ka mokhoa o ke keng oa qojoa ke ho kena-kenana le matrix a peterole.

Mokhoa oa ho lemoha chromatograph-nitrogen chemiluminescence o hloka hore ho lokisoe mochine o turang oa nitrogen chemiluminescence o ka khethollang naetrojene ka boikhethelo. Mokhoa oa naha o sa tsoa ngoloa (o seng o tla hatisoa) "Chromatography ea Khase bakeng sa Boikemisetso ba Oxycompounds le Metsoako ea aniline ka har'a peterole" e boetse e hlalosa mokhoa oa ho hlahloba ho sebelisoa li-Deans switch holim'a litšiea tse peli tse fapaneng tsa polarity ho sebelisa mochine o tloaelehileng le o batlang o le theko e tlaase oa hydrogen ion flame. Bakeng sa mokhoa ona, ThermoFisher Scientific e phatlalalitse pampiri ea Kopo (Lintlha tsa Kopo C GC-50). E le ho nolofatsa, pampiri ena e hlahisa mokhoa o potlakileng oa kholumo e le 'ngoe ho latela maemo a lehae a DB37/T-2650 a fanoeng ke Profinse ea Shandong ka 2015 [5]. Liphello li bontša hore mokhoa ona o bonolo ho sebetsa, ka ho pheta-pheta hantle le ho nepahala ho phahameng. Ka nako e ts'oanang, mokhoa ona o ile oa ntlafatsoa ho rarolla bothata ba ho kena-kenana le palo ea aniline ka sebopeho sa matrix a peterole.

2. Kakaretso ea molao-motheo oa mokhoa Holima polar polyethylene glycol (PEG), metsoako ea aniline ka peterole ea likoloi e ne e arohane le matrix a peterole, 'me acetophenone e ne e sebelisoa e le tekanyetso ea ka hare. Lintho tse ka hare ho aniline, N-methylaniline, o-methylaniline, p-methylaniline, m-toluidine le N, n-dimethylaniline ka peteroleng ea likoloi li ne li khethoa ke chromatograph ea khase e nang le mochine oa ionization oa mollo (FID), 'me mahloriso a karolo ka 'ngoe e ne e le. e baloang ka ho ipapisa le maemo a ka hare.

3. Liletsa

3.1 Trace 1300E Gas Chromatograph e nang le shunt/non-shunt inlet,

AS1310 sampler othomathike, Flame ionization detector (FID);

3.2 Software ea Chameleon

3.3 Microsyringe: matla ke 10uL.

4. Li-reagents le lisebelisoa

4.1 Kholomo: Kholomo ea Polar, TG-Wax, bolelele ba kholomo 60m,

Inner bophara 0.25mm, mokelikeli filimi botenya 0.25μm

4.2 Ntle le ha ho hlalositsoe ka tsela e 'ngoe, li-reagents tse sebelisoang mokhoeng ona li hloekile ka mokhoa o hlakileng 'me lia lumelloa

Sebelisa li-reagents tse ling tsa bohloeki bo phahameng.

Lisebelisoa tse sebelisoang molemong oa boleng le bongata, ho kenyeletsoa aniline (Ca #62-53-3), N-

Methylaniline (CAS#100-61-8), o-methylaniline (CAS#95-53-4),

P-methylaniline (CAS#106-49-0), m-methylaniline (CAS#188-44-)

1) le N, n-dimethylaniline (CAS # 121-69-7), tekanyetso ea ka hare e ne e le phenylene

Ketone (CASA # 96-86-2).

5. Mekhoa ea liteko

5.1 Ho thehoa ha curve e tloaelehileng

5.1.1 Tokisetso ea tharollo e tloaelehileng: Lintho tsohle tse tloaelehileng ke isooctane (chromatographically pure)

Dilution, ka ho latellana e hlophisitsoeng ka lintho tse tšeletseng tsa aniline ho 0.1%, 0.2%, 0.5%, 1%,

Bakeng sa lisampole tse tloaelehileng maemong a 1.5% le 2%, bona Lethathamo la 1 bakeng sa lintlha tse felletseng tsa mahloriso.

Letlapa la 1. Tafole e tloaelehileng ea mohlala oa mahloriso

5.1.2Mehlala e tloaelehileng e ile ea hlahlojoa ho latela mokhoa oa GC ho Lethathamo la 2

Letlapa la 2. Mokhoa oa GC

5.1.3 Boleng: Likarolo li na le boleng ho latela nako ea ho boloka karolo ka 'ngoe, 'me chromatogram ea sampuli e tloaelehileng ea mofuta o tloaelehileng (0.1% boemo ba mahloriso) e bontšoa ho Setšoantšo sa 1.

Setšoantšo sa 1. Chromatogram ea sampuli e tloaelehileng e tloaelehileng

5.1.4 Theha mothinya o tloaelehileng. Fetola mokhoa oa ho lekanya ka mokhoa oa ts'ebetso ea data ho software ea Chameleon, mofuta oa calibration o na le mela (e sa qobelloe ho feta tšimoloho), mofuta oa tlhahlobo ke sebaka sa tlhōrō, 'me maemo a ka hare a fetoha. Tekanyo e tloaelehileng ea curve equation le linear coefficient coefficient ea karolo ka 'ngoe e bonts'itsoe ho Lethathamo la 3, 'me lekhalo le tloaelehileng la karolo ka' ngoe le bontšoa ho Setšoantšo sa 2-7.

tafole 3. Calibration curve data

5.1.5 Palo ea Sephetho: Karo-karolelano ea sebaka sa tlhōrō ea karolo ka 'ngoe ho sebaka se phahameng sa acetophenone se baloa. Karolo ea boima ba karolo e 'ngoe le e' ngoe e tsamaellanang le karo-karolelano e baloa ho tloha mokhoeng o nepahetseng oa tokiso, 'me sephetho se nepahetse ho 0.01%.

6. Liphetho le puisano

6.1 Mokokotlo o tloaelehileng: Mokokotlo o tloaelehileng o thehiloe ke lihlahisoa tse 6 tse tloaelehileng, mefuta ea mahloriso ea molumo e tloha ho 0.01% ho ea ho 2.0%, 'me coefficient ea coefficient ea R2 e kholo ho feta 0.999, ka ho latellana (bona Lethathamo la 3 bakeng sa lintlha).

6.2 Mokhoa oa ho netefatsa le ho ntlafatsa: Ha ho bapisoa le mokhoa oa ho fetola Deans, mokhoa o le mong oa kholomo o hlahisitsoeng pampiring ena o na le melemo ea litšenyehelo tse tlaase, ts'ebetso e bonolo le ho ikatisa ho hoholo. Leha ho le joalo, likarolo tse ling tsa matrix a peterole li ka ama metsoako ea aniline.

Mohlala, ho latela mokhoa o hlalositsoeng pampiring ena, ha ho hlahlojoa sampole ea matrix ea peterole e se nang letho, ho fumanoa hore kamora ho bapisa le chromatogram ea sampole e tloaelehileng, ho na le tlhoro e ka bang 0.04min (bophara ba tlhoro ea tlhoro ke 0.07min) ho tsoa ho karolo ea aniline ea sehlahisoa se tloaelehileng, se sitisang tlhahlobo ea aniline. (sheba setšoantšo sa 2)

3

FEIE. 2. Papiso pakeng tsa aniline standard solution spectra le blank peterole matrix spectra

E le ho netefatsa hore ntho ena ha e na aniline, 'me u felise tšitiso ea quantification ea aniline. Mokhoa o pampiring ena o ntlafalitsoe, mme ts'ebetso ea ho phahama ha mocheso oa lenaneo ke

Tlhaloso ea DB37/T-2650 ea 5℃ /min e fetotsoe ho 4℃ /min. Mehlala ea matrix ea peterole e nang le lisampole tse tloaelehileng tse kentsoeng li ile tsa hlahlojoa ka mokhoa ona. Joalokaha ho ka bonoa ho FIG. 3,

Mokhoa o ntlafalitsoeng o ka arola karolo ena ho aniline ka har'a matrix ea peterole, mme hape e paka hore sampole ea oli e ka fumanoa ka mokhoa oa DB37/T-2650.

Tlhōrō ea 21.905min e ne e se aniline. Sehlopha sa tšitiso se ne se ikemiselitse ho ba naphthalene ka boleng ba boleng ba spectrometry le papiso e tloaelehileng.

FEIE. 3. Papiso ea spectra ea lisampole tsa oli, lisampole tsa aniline le matrix ea peterole (mokhoa o ntlafalitsoeng)

6.2 Sekhahla sa ho hlaphoheloa le teko e nepahetseng: Teko e tloaelehileng ea tekanyo ea ho hlaphoheloa e entsoe ka matrix ea peterole e se nang letho, 'me tekanyo e tloaelehileng ea ho hlaphoheloa ka tekanyo ea ho eketsoa ea 100ppm e entsoe (n = 5). Liphetho li bontšitsoe ho Lethathamo la 4.

tafole 4. Sekhahla sa ho hlaphoheloa le liphetho tsa tlhahlobo ea ho pheta-pheta

7.sephetho

Teko ena e bua ka maemo a lehae a DB37/T-2650 a Profinseng ea Shandong, 'me e amohela sebui sa FID ho bona metsoako ea aniline ka har'a peterole. Mokhoa o bonolo 'me sephetho se ka tšeptjoa. Le hoja tšitiso e ka sebelisoa tlhahlobong ea sebele, ho kena-kenana le naphthalene likarolong tse ling tsa peterole ho hlahloba aniline ho ka qojoa ka ho ntlafatsa maemo.

Litšupiso:

［1］Zhong Shaofang, WEN Huan et al. Boikemisetso ba Methylaniline Additives in Motor Gasoline by Gas Chromatography [J]. Spectrum Laboratory, 2012, Buka ea 29, Khatiso ea 6, 3564-3567.

［2］Zhang Maolin, LI Baoding, ZHANG Yufa.Thuto mabapi le boikemisetso ba N-methylaniline ka Spectrophotometry [J]. Journal of Zhengzhou Grain University, 2000, 21(2) : 86-88.

［3］Liu Baomin, LIU Minghong, XU Hong et al. Boithuto bo mabapi le boikemisetso ba nako e le 'ngoe ba aniline, N-methylaniline le N, N-dimethylaniline moeeng ka chromatography ea metsi a phahameng a sebetsang hantle [J]. Sechaena Journal of Health Inspection, 2009, 19 (8) : 1804-1807.

［4］Yang Yongtan, Wu Ming-qing, WANG Zheng.Kabo ea metsoako e nang le naetrojene ka peterole ea catalytic ka gas chromatography-Nitrogen chemiluminescence discovery [J]. Chromatography, 2010, 28(4): 336 - 340

DB37/T-2650, Qeto ea metsoako ea aniline ka peterole ea motlakase ka chromatography ea khase