Alkanolamine Gas Sweetening
Xaiv cov kuab tshuaj rau Natural Gas & Sour Gas Treatment
Tus txheej txheem engineer cov lus qhia rau pub roj tus yam ntxwv, amine hnyav xaiv, blended system tsim, thiab lub luag hauj lwm ntawm NBEA, BDEA, DMEA, thiab DEAE nyob rau hauv industrial gas kho.
📋 Hauv kab lus no
- Cov txheej txheem roj sweetening - txheej txheem cej luam
- Feed gas characterization: dab tsi drives hnyav xaiv
- H₂S vs CO₂ tshem tawm: sib txawv chemistry, sib txawv cov kuab tshuaj
- Solvent Performance Parameters piav qhia
- Qhov twg NBEA thiab BDEA haum rau kev kho roj
- Qhov twg DMEA thiab DEAE haum rau kev kho roj
- Tsim ib qho kev sib xyaw amine system
- Cov teeb meem kev ua haujlwm thiab kev daws teeb meem
- Solvent losses: ua rau thiab tswj
- Environmental thiab regulatory xav txog
- Cov lus nug uas nquag nug
1. Cov txheej txheem roj qab zib - Txheej txheem cej luam ⛽
Cov pa roj carbon monoxide uas tsim los ntawm cov chaw cia khoom - tshwj xeeb tshaj yog los ntawm siab - siab, tob, los yog geologically complex formations - feem ntau muaj cov kua qaub: hydrogen sulfide (H₂S) thiab carbon dioxide (CO₂). Ob leeg muaj teeb meem: H₂S muaj tshuaj lom nyob rau hauv qhov qis heev (tam sim no txaus ntshai rau lub neej siab tshaj 100 ppm), corrosive rau hlau nyob rau hauv lub xub ntiag ntawm dej, thiab yuav tsum tau muab tshem tawm los tiv thaiv tib neeg, khoom siv, thiab downstream txheej txheem. CO₂ yog corrosive hauv kev daws, txo cov nqi cua sov ntawm cov roj, thiab ua rau muaj teeb meem kev ua haujlwm (khov, hydrate tsim) hauv LNG thiab cov kav dej.
⚙️ Kev nqus- rov tsim dua tshiab - nws ua haujlwm li cas
Absorber (40-60 degree)
Cov roj qaub nkag mus rau hauv qab ntawm ib lub thawv ntim khoom lossis lub tais. Lean amine tov (CO₂ / H₂S loading qis) ntws los saum toj. Gas-kwv dej ua rau CO₂ thiab H₂S mus rau theem amine. Cov roj qab zib tawm sab saum toj; nplua nuj amine (loaded nrog acid gases) tawm hauv qab.
Regenerator (100-130 degree)
Cov nplua nuj amine yog preheated thiab pub rau ib kab stripper. Chav los ntawm lub reboiler thim rov qab cov tshuaj tiv thaiv kev nqus, tsav tawm cov roj acid uas muaj zog (xa mus rau kev rov qab los yog qhov cua). Lean amine yog txias thiab rov ua dua rau lub absorber. Lub voj voog rov ua tsis tu ncua.
Kev lag luam ntawm tag nrho lub voj voog yog tswj hwm los ntawm ib qho kev lag luam tseem ceeb -tawm:absorption vs regeneration zog. Fast-absorbing amines (thawj, theem nrab) ua tiav cov khoom lag luam nruj tab sis yuav tsum tau muaj cua sov ntau dua rau strip. qeeb -absorbing amines (tertiary) xav tau cua sov tsawg dua tab sis yuav xav tau cov absorbers loj dua los yog hnyav dua. Blended amine systems yog tsim los nrhiav qhov zoo tshaj plaws ntawm qhov kev lag luam no -tawm nkhaus rau ib qho tshwj xeeb pub roj muaj pes tsawg leeg thiab cov khoom specification.
2. Feed Gas Characterization: Dab Tsi Tsav Kev Xaiv Cov Khoom Siv 🔬
Ua ntej xaiv cov kuab tshuaj alkanolamine, tus txheej txheem kws ua haujlwm yuav tsum ua kom pom cov pa roj thoob plaws ntau qhov ntev. Cov kev txwv no txiav txim siab seb cov chav kawm amine (lossis sib xyaw) yog qhov tsim nyog thiab cov kev ua haujlwm twg yuav ua tiav cov khoom specification.
| Pub parameter | Yog tias qis → | Yog siab → |
|---|---|---|
| H₂S ib nrab siab (pCO₂ₐₛ) | Tertiary amine tau txais (kev xaiv tsawg dua qhov tseem ceeb) | Tertiary nyiam (xaiv H₂S tshem tawm; tsis txhob nkim peev ntawm CO₂) |
| CO₂ ib nrab siab (pCO₂) | Tertiary amine tuaj yeem ua haujlwm (kinetics qeeb tseem txaus ntawm pCO₂ siab) | Thawj / theem nrab xav tau rau kev nqus sai tiv thaiv kev tsav tsheb tsawg |
| Lean CO₂ spec (cov khoom purity) | Tertiary amine feasible (>1% CO₂ tau txais) | Thawj/secondary yuav tsum tau (<50 ppm for LNG/pipeline) |
| Gas siab (absorber ua haujlwm) | Tsawg pCO₂/pH₂S → xav tau ceev kinetics; thawj/secondary nyiam | Siab ib nrab siab → tertiary txaus; tsawg dua kinetic li xav tau |
| Hnyav hydrocarbons (C5+) nyob rau hauv pub | Txhua chav kawm amine txais tau | Siab dua MW, ntau lipophilic amines (NBEA, BDEA) qhia tau zoo dua rau hydrocarbon co-absorption thiab foaming |
| Cov ntsiab lus O₂ (flue gas / PCC) | Txhua chav kawm amine txais tau (natural gas tsis muaj O₂) | Tertiary amines (DMEA, DEAE) nyiam heev - tsis muaj N-H daim ntawv cog lus rau oxidative nres |
3. H₂S vs CO₂ Tshem Tawm: Cov Chemistry sib txawv, Cov kuab tshuaj sib txawv ⚗️
H₂S thiab CO₂ ob leeg hnov mob nrog aqueous amines, tab sis lawv cov tshuaj tiv thaiv kinetics sib txawv hauv paus - thiab qhov sib txawv no yog lub hauv paus ntawm kev xaiv H₂S tshem tawm, yog ib lub peev xwm tseem ceeb tshaj plaws ntawm tertiary alkanolamine solvents.
H₂S nqus
H₂S yog cov kua qaub uas tsis muaj zog uas cuam tshuam nrog txhua yam amine (thaum pib, theem nrab, lossis theem nrab) los ntawm proton sai sai -txoj kev hloov pauv - tsis tas yuav tsum muaj daim ntawv cog lus:
R₃N + H₂S → R₃NH⁺ + HS⁻ (fast, diffusion-limited)
Cov tshuaj tiv thaiv no nrawm heev uas nws tswj tau los ntawm huab hwm coj hloov pauv (diffusion ntawm H₂S mus rau cov pa roj-kua interface), tsis yog los ntawm cov tshuaj tiv thaiv kinetics. Txhua hom amine nqus H₂S ntawm qhov tseem ceeb ntawm tib tus nqi raws li kev tsav tsheb sib npaug.
CO₂ nqus
CO₂ yuav tsum tsim ib daim ntawv cog lus tshiab nrog cov amine nitrogen (primary/secondary) los yog mus los ntawm cov dej qeeb -hydration step (tertiary). Qhov no ua rau CO₂ nqus intrinsically qeeb dua H₂S thiab nyob ntawm hom amine:
Primary/secondary: CO₂ + RNH₂ → carbamate (ceev - milliseconds)
Tertiary: CO₂ + H₂O → H₂CO₃ → bicarbonate (slow - vib nas this mus rau feeb)
Txoj kev xaiv xaiv:Vim tias H₂S nqus tau nrawm rau tag nrho cov amines thaum CO₂ nqus tau qeeb rau tertiary amines, tertiary alkanolamine absorber nrog lub sij hawm luv luv ntawm cov kua (kem luv lossis nrawm nrawm) yuav nqus tau yuav luag tag nrho H₂S tab sis kuj tsawg ntawm CO₂. Qhov no yog lub hauv paus ntawmxaiv H₂S tshem tawm- tsim Claus feed gas enriched nyob rau hauv H₂S thaum ntog CO₂ rov qab mus rau hauv cov pa kho uas nws tsis tshua muaj teeb meem. DMEA thiab DEAE, raws li tertiary amines, muab qhov kev xaiv zoo dua; NBEA thiab BDEA (primary/secondary) tsis ua.
4. Cov Txheej Txheem Kev Ua Haujlwm tau piav qhia 📊
Tsib qhov kev txwv tsis pub muaj kev sib piv engineering ntawm amine solvents. Nkag siab lawv rau txhua qib alkanolamine ua rau muaj kev xaiv cov kuab tshuaj muaj txiaj ntsig thiab sib xyaw tsim.
⚡ 1. Tus nqi nqus (thib ob- tus nqi xaj tas li k₂)
Tus nqi ntawm cov amine reacts nrog CO₂ hauv cov kua zaj duab xis txiav txim siab absorber efficiency. Rau thawj amines (NBEA, MEA), k₂ yog 5,000–8,000 L/mol·s ntawm 25 degree. Rau cov amines theem nrab (BDEA, DEA), k₂ yog 1,000–3,000 L/mol·s. Rau tertiary amines (DMEA, DEAE, MDEA), qhov zoo k₂ yog 0.1–10 L/mol·s - dominated los ntawm cov dej hydration kauj ruam. Ib qho siab dua k₂ txhais tau hais tias ib qho luv luv absorber kem lossis siab dua throughput rau tib qhov sib cais.
📦 2. Theoretical loading peev (mol acid gas / mol amine)
Primary and secondary amines form carbamates - ib qho CO₂ molecule reacts nrog ob lub amine molecules (ib qho los ua carbamate, ib qho los txais cov proton), muab qhov theoretical loading ntawm 0.5 mol CO₂ / mol amine. Tertiary amines daim ntawv bicarbonate - ib qho amine txais ib qho proton ib CO₂ molecule - muab qhov theoretical loading ntawm 1.0 mol CO₂ / mol amine. Nyob rau hauv kev xyaum, nplua nuj loads tsis tshua muaj tshaj 0.45-0.5 rau thawj/secondary los yog 0.7-0.8 rau tertiary vim corrosion thiab viscosity txwv. Ntau lub peev xwm thauj khoom ncaj qha txo qis qhov xav tau cov kuab tshuaj ncig.
🔥 3. Thaum tshav kub kub nqus (kJ/mol CO₂)
Carbamate tsim tawm 80-100 kJ / mol CO₂ ntau dua qhov kub ntawm bicarbonate (~ 50 kJ / mol). Cov cua sov ntxiv no yuav tsum tau muab rau hauv lub tshuab hluav taws xob reboiler kom thim rov qab cov tshuaj tiv thaiv - uas yog vim li cas thawj cov tshuab amine xav tau 160-200 kJ / mol CO₂ ntawm reboiler lub luag hauj lwm thaum tertiary amine systems xav tau tsuas yog 80-100 kJ / mol CO₂. Rau cov nroj tsuag tshem tawm 1,000 tonne / hnub ntawm CO₂, qhov sib txawv no sawv cev kwv yees li 40–60 MW ntawm reboiler lub luag haujlwm - tus nqi khiav lag luam tseem ceeb.
💧 4. Solvent vapor poob (boiling point and vapor pressure)
Alkanolamine poob rau cov roj kho yog ob qho tib si tus nqi ua haujlwm (ua kom- raws li qhov yuav tsum tau ua) thiab kev lav phib xaub rau ib puag ncig (amine emissions rau huab cua). Qhov kub siab dua thiab qis dua vapor siab ncaj qha txo cov kuab tshuaj nqa - dhau. BDEA (bp 274 degree, vp<0.01 hPa) loses 20–30× less solvent per unit volume of gas treated than MEA (bp 171 °C, vp ~0.5 hPa). For offshore gas treating where overboard discharge is restricted, BDEA's low volatility provides a compelling advantage.
🛡️ 5. Corrosivity thiab degradation tus nqi
Cov nplua nuj amine kev daws teeb meem ntawm kev thauj khoom siab yog corrosive rau carbon steel - feem ntau vim yog yaj CO₂ ua carbonic acid ntawm cov hlau nto, thiab rau carbamate ion kev ua ntawm cov hlau nto. Thawj amines ntawm cov khoom nplua nuj tshaj 0.4 mol / mol hauv cov khoom siv carbon steel yuav tsum muaj kev tiv thaiv corrosion (vanadium pentoxide 0.1-0.5%) lossis stainless hlau sab hauv. Tertiary amines (DMEA, DEAE) tsis tshua muaj corrosive ntawm qhov sib npaug ntawm kev thauj khoom vim tias cov bicarbonate tsim tsis tshua muaj siab dua li carbamate. BDEA's Secondary amine carbamate qhia tau hais tias nruab nrab corrosivity.
5. Qhov twg NBEA thiab BDEA haum rau Gas Treating 🏭
Tsis yog NBEA lossis BDEA tsis yog cov pa roj ntau hauv kev kho cov kuab tshuaj raws li MEA lossis MDEA yog. Lawv cov nqi hauv kev kho roj yog los ntawm cov txheej txheem tshwj xeeb uas lawv ua ke ntawm butyl -chain lipophilicity, boiling point, thiab amine hom muab qhov zoo uas luv dua - chain homologues tsis tuaj yeem sib tw.
NBEA - thawj amine, roj kho niche siv
- Foaming -cov tshuaj tiv thaiv:Lub butyl chain's ib nrab hydrophobicity txhim kho tus cwj pwm nruj ntawm cov tshuaj amine, txo qhov nyiam ua npuas ncauj thaum sib cuag nrog hydrocarbon - cov roj nplua nuj (cov roj sib txuas, roj condensate). MEA-raws li systems hu rau C5+ hydrocarbons nquag ua npuas ncauj; NBEA- muaj cov khoom sib xyaw ua haujlwm ntau dua.
- Thawj amine pab hauv kev sib xyaw:Qhov twg ceev - nqus cov thawj amine yog xav tau tab sis MEA lub siab vapor siab yog qhov tsis xav tau, NBEA qhov kub siab dua (199℃vs 171℃rau MEA) txo cov absorber overhead amine nqa- dhau.
- Me - ntim tshwj xeeb kho:Rau me me skid-mounted sweetening units ua cov roj qaub nrog nruab nrab H₂S thiab CO₂, NBEA ntawm 25–35% muab kev kho mob zoo hauv ib qho - cov kuab tshuaj.
BDEA - Secondary amine, gas kho niche siv
- Offshore low-kev kho mob:BDEA lub vapor siab (<0.01 hPa) is among the lowest of any commercial alkanolamine. Offshore gas treating on FPSOs (floating production, storage, offloading vessels) and platform facilities where amine discharges to sea are tightly regulated benefit significantly from BDEA as a partial replacement for DEA or MEA.
- Kev tshem tawm ntau CO₂ nrog kev xaiv nruab nrab:BDEA tus cwj pwm amine theem nrab muab H₂S xim nruab nrab - ntau dua li thawj amines tab sis tsawg dua tertiary. Rau cov pa roj carbon dioxide uas CO₂ yuav tsum tau txo qis tab sis tsis tshem tawm, BDEA-raws li systems zam cov teeb meem corrosion ntawm MEA ntawm kev thauj khoom siab.
- High -kub regenerator systems:BDEA's bp 274℃tso cai rau nws ua haujlwm ntawm regenerator kub txog li 130-135℃yam tsis muaj vapor ntau dhau - ib qho kev txwv uas txwv DMEA kev siv hauv siab -kub regenerators.
6. Qhov twg DMEA thiab DEAE haum rau Gas Treating ♻️
Raws li tertiary amines, DMEA thiab DEAE nyob hauv tib qhov chaw ua haujlwm zoo li MDEA hauv kev kho roj - CO₂ absorbers qeeb, zoo heev H₂S selectors, thiab qis - rov tsim dua - lub zog hnyav. Lawv qhov zoo dua ntawm MDEA yog qhov hnyav molecular: ntawm qhov sib npaug ntawm qhov hnyav, DMEA thiab DEAE xa ntau moles ntawm amine, uas yuav txo tau cov kuab tshuaj thiab cov nqi zog.
| Parameter | MDEA (Reference) | DMEA | DEAE |
|---|---|---|---|
| Molecular Luj (g / mol) | 119 | 89 (25% sib dua) | 117 (2% sib dua) |
| Moles amine ib kg hnyav (40 wt%) | 3.36 mol / kg | 4.49 mol/kg (+34%) | 3.42 mol / kg (+2%) |
| Kub point (degree) | 247 | 135 ⚠️ (vapor poob txaus ntshai) | 162 (kev tswj hwm) |
| pKa | 8.5 | 9.2 (ntau dua kinetics) | 8.9 (nruab me ntsis) |
| H₂S xaiv | High (tus qauv kev lag luam) | Siab | Siab |
| Regen. Thaum tshav kub kub (kJ / mol CO₂) | 80–100 | 85–105 | 80–100 |
| Max regen. temp. (lub tswv yim) | 130 degree | 110℃(bp txwv) | 120 degree |
DMEA Boiling Point ceev faj:DMEA's 135℃boiling point txhais tau tias nws yuav ib nrab distill nyiaj siv ua haujlwm nyob rau hauv lub regenerator ntawm tus qauv kev khiav hauj lwm kub (110-130 degree). Qhov no ua rau ob qho teeb meem: (1) DMEA nce zuj zus los ntawm cov khoom lag luam hnyav, yuav tsum ua kom- nce; (2) DMEA nyob rau hauv lub regenerator overhead condenser thiab acid gas kwj, uas tej zaum yuav cuam tshuam nrog downstream sulfur rov qab units. Hauv kev xyaum, DMEA yog siv los ua ib qho kev sib xyaw tertiary ntawm 10-20% ntawm cov khoom lag luam amine, tsis yog thawj cov kuab tshuaj, kom txo cov vapor poob los. DEAE (bp 162 degree) yog qhov tsim nyog dua li qhov siab dua -concentration tertiary tivthaiv hauv cov pa regenerators.
7. Tsim kom muaj Blended Amine System 🔧
Txoj hauv kev zoo tshaj plaws los ua kom zoo rau kev kho cov pa roj yog muab ob lossis ntau dua amines - txhua qhov ua rau nws muaj zog tshwj xeeb thaum lwm tus them rau nws qhov tsis muaj zog. Txoj kev tsim qauv ua raws li txheej txheem txheej txheem.
Txhais cov khoom specification thiab pub roj muaj pes tsawg leeg
Txiav txim siab qhov xav tau ntshiv CO₂ thiab H₂S concentrations. Puas yog xaiv H₂S tshem tawm? Lub hauv paus tsim Claus unit yog dab tsi? Cov kev qhia tshwj xeeb no tau teeb tsa cov kev xav tau ntawm absorber efficiency thiab txiav txim siab seb tertiary amine selectivity yog xav tau los yog seb puas yuav tshem tawm ntau nrog cov thawj / theem nrab amine txaus.
Xaiv lub tertiary amine puag (yog tias xaiv tau lossis qis regen. lub zog xav tau)
Rau cov ntug dej hiav txwv los yog loj - nplai onshore units uas regeneration zog yog tus nqi khiav lag luam tseem ceeb, siv DEAE 30–45% lossis MDEA 35–50% ua cov hnyav hnyav. DMEA yog tsim rau me me - nplai los yog qis dua - qhov kub thiab txias qhov twg nws vapor siab tswj tau. BDEA tuaj yeem ua haujlwm thib ob / tseem ceeb hauv kev ua haujlwm offshore qis - poob.
Ntxiv cov activator tivthaiv (yog tias CO₂ nqus tus nqi yog txwv)
Ntxiv 3–8% piperazine, MEA, los yog NBEA rau lub hauv paus tertiary los muab ceev ceev carbamate tsim kinetics ntawm cov roj- kua interface. Tus activator ua haujlwm kinetic; lub hauv paus tertiary muab lub peev xwm loj thiab tsis tshua muaj zog. Piperazine yog qhov muaj zog tshaj plaws activator rau ib chav tsev qhov hnyav; MEA yog pheej yig tshaj; NBEA muaj qis vapor siab dua MEA nrog kev sib piv kinetic activation.
Optimize tag nrho amine concentration thiab ncig tus nqi los ntawm kev simulation
Siv cov qauv thermodynamic nruj (ProMax, Aspen HYSYS, AVEVA SimSci, los yog sib npaug) los simulate lub absorber thiab regenerator ntawm lub hom phiaj hnyav muaj pes tsawg leeg, kev ncig tus nqi, thiab reboiler kub. Iterate kom txog rau thaum cov khoom specification tau ntsib nrog reboiler lub luag hauj lwm, tsim nyog cov khoom hnyav, thiab cov hnyav hnyav poob. Tshawb xyuas tawm tsam cov ntaub ntawv sim luam tawm rau kev sib xyaw amine tshwj xeeb.
8. Cov teeb meem kev ua haujlwm thiab kev daws teeb meem 🛠️
| Teeb meem | Keeb kwm | Kev daws teeb meem / txo qis |
|---|---|---|
| Absorber dej nyab | Cov kua dej ntau dhau, siab -viscosity amine, foaming, lossis kem hydraulic overload | Txo tus nqi khiav; hloov mus rau qis dua -viscosity amine blend; ntxiv antifoam (silicone los yog polyglycol); xyuas cov khoom ntim |
| Ua npuas ncauj ntau dhau | Hydrocarbon contamination (C{0}} ingress), amine degradation khoom, tshem tawm cov khib nyiab, siab amine concentration | Nruab coalescer ntawm inlet gas; txhim kho pub roj sib cais; xyuas activated carbon lim; txo amine concentration; nce koob tshuaj antifoam; reclaim hnyav |
| Corrosion nyob rau hauv nplua nuj amine circuit | High CO₂ loading ntawm thawj / theem nrab amine; kub kub hauv lean/nplua nuj exchanger kub kawg; hlau sulfide deposits ua raws li galvanic hlwb | Txo kev thauj khoom nplua nuj (qis L / G piv); ntxiv V₂O₅ corrosion inhibitor 0.1-0.3%; hloov ib nrab mus rau tertiary amine kom txo cov carbamate concentration; huv si exchanger; hloov mus rau SS internals |
| Thaum tshav kub kub- ruaj khov ntsev | Cov tshuaj tiv thaiv tsis tuaj yeem ntawm amine nrog SO₂, HCN, organic acids, lossis oxidation byproducts; txo cov amine muaj peev xwm nyob rau lub sijhawm | Ion txauv resin reclaiming (muaj zog acid cation resin); thermal reclaiming (nqus distillation ntawm amine los ntawm HSS); tshem tawm SO₂ ntawm inlet; txhim kho pub roj zoo |
| Cov kuab tshuaj degradation (oxidative) | O₂ ingress ntawm huab cua mus rau hauv amine cia tank los yog tsawg- cov ntsiab lus siab hauv lub cev; mob hnyav tshaj plaws nrog thawj amines | Nitrogen{0}}pam amine cia tanks; txo amine raug rau huab cua thaum lub sij hawm tu lub twj tso kua mis; hloov thawj amine tivthaiv los ntawm MEA rau NBEA (me ntsis ruaj khov); Ntxiv oxidation inhibitor (EDTA) |
| Amine nqa- hla mus rau cov roj kho | Tsis txaus absorber overhead demister / dej ntxuav; siab amine vapor siab; aerosol entrainment los ntawm foaming | Ntxiv dej ntxuav seem ntawm absorber saum; siv qis dua -volatility amine (BDEA, DEAE); txhim kho demister tsim; txo foaming; saib xyuas cov roj amine cov ntsiab lus los ntawm GC txhua hli |
9. Cov kuab tshuaj poob: Ua rau thiab tswj 💧
Cov kuab tshuaj poob yog tus nqi ua haujlwm tseem ceeb hauv cov chaw kho amine - ua - nce amine yog ib qho kev siv nyiaj rov qab, thiab amine emissions mus rau qhov chaw ua rau muaj kev cuam tshuam ib puag ncig thiab kev tswj hwm. Losses tshwm sim los ntawm plaub txoj kev.
💨 Vapor losses (kho roj nqa- dhau)
Amine vaporizes rau hauv cov pa roj qab zib saum lub absorber. Raws li vapor siab - MEA poob ~ 50–150 g / 1000 Nm³; BDEA poob<1–5 g/1000 Nm³. Controlled by water wash section and demister pad. The boiling point advantage of BDEA and DEAE over MEA translates directly to lower make-up cost at large-volume treating units.
🌊 Kua nqa- dhau (mist/aerosol)
Fine amine droplets entrained nyob rau hauv cov roj kwj - tshwj xeeb tshaj yog los ntawm foaming txheej xwm. Kev poob qis: 5-50 ppmw ntawm amine hauv cov roj kho. Tswj los ntawm qib siab -kev ua tau zoo hlau mesh demisters, vane packs, thiab cyclonic separators ntawm lub absorber overhead. Foaming tswj yog qhov kev ntsuas zoo tshaj plaws.
🔥 Thermal / oxidative degradation
Amine tau noj los ntawm cov tshuaj tiv thaiv es tsis yog lub cev poob. Cov khoom degradation khaws cia hauv cov khoom hnyav. Reclaiming tshem tawm lawv thiab rov siv tau amine. Kwv yees li ntawm 0.5-3 kg / tonne CO₂ tshem tawm rau MEA; 0.2–1 kg/tonne rau MDEA lossis BDEA hauv O₂-kev pabcuam roj ntuj pub dawb.
🔩 Mechanical losses
Amine poob thaum lub sij hawm tu cov dej num - cov twj tso kua mis, cov khoom siv hluav taws xob tu, cov qauv coj mus ua, txeej. Tswj los ntawm cov txheej txheem tu vaj tsev zoo, kaw cov qauv kaw, thiab rov qab cov amine los ntawm kev tu cov khib nyiab. Feem ntau 0.1–0.5 kg/tonne CO₂ tshem tawm - me me tab sis tiv thaiv tau.
10. Environmental and Regulatory Considerations 🌿
Amine emissions los ntawm cov chaw kho roj yuav raug soj ntsuam xyuas, tshwj xeeb tshaj yog rau cov chaw loj - nplai thiab kev teeb tsa sab nrauv.
🏭 Atmospheric amine emissions
Atmospheric cov tshuaj tiv thaiv ntawm alkanolamines nrog NOₓ tsim nitramines thiab nitrosamines nyob rau hauv cov kab ntau lawm. Norwegian Environment Agency (Miljødirektoratet) kev tshawb fawb ntawm MEA loj-raws li CO₂ ntes cov nroj tsuag tau txheeb xyuas qhov no yog qhov kev txhawj xeeb ntawm ntau- pua MW nplai. Nyob rau hauv ib txwm gas kho chav tsev emissions tus nqi, concentrations nyob rau hauv ib ncig ntawm cov nroj tsuag yog zoo nyob rau hauv cov nqe lus ntawm kev noj qab haus huv. Cov kev taw qhia kev cai sib txawv raws li kev txiav txim siab - txheeb xyuas nrog cov cai hauv cheeb tsam ib puag ncig rau cov nroj tsuag loj -.
🌊 Marine tso tawm (offshore)
OSPAR (Convention for the Protection of the Marine Environment of the North-East Atlantic) thiab MARPOL txoj cai txwv tsis pub tshaj tawm ntawm amine- uas muaj cov dej thiab cov condensate. Cov neeg ua haujlwm ntawm Norwegian Continental Shelf thiab UK North Hiav Txwv yuav tsum ua raws li cov kev txwv amine tso tawm nruj. Siv cov -volatility amines qis (BDEA, DEAE) txo cov vapor nqa- dhau los ua cov kua dej, txo cov amine cov ntsiab lus hauv cov dej ntws uas xav tau kev tswj kev tawm.
11. Cov lus nug uas nquag nug ❓
🔗 Cov nplooj ntawv ntsig txog cov khoom lag luam
N-Butylethanolamine (NBEA)
CAS 111-75-1 · Primary amine · Foaming-resistant blends, specialty treatment
N-Butyldiethanolamine (BDEA)
CAS 102-79-4 · Secondary amine · Offshore low-kev kho mob, tsis muaj vapor-poob blends
Dimethylethanolamine (DMEA)
CAS 108-01-0 · Tertiary amine · Blended low-energies solvents, CO₂ EOR, PCC
Diethylethylamine (DEAE)
CAS 100-37-8 · Tertiary amine · Selective H₂S kho, TGTU, blended PCC cov kuab tshuaj
Kev nug txog kev lag luam lossis kev muab khoom ntau
Tham nrog Sinolook Chemical
Peb muab NBEA, BDEA, DMEA, thiab DEAE rau kev kho cov pa roj thiab cov pa roj carbon capture daim ntawv thov nyob rau hauv nruas, IBC, thiab ISO tank ntau nrog SGS - ntawv pov thawj CoA, REACH cov ntaub ntawv, thiab cov txheej txheem simulation txhawb.
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