Qhov sib txawv tseem ceeb ntawm cov thee tar thiab bitumen yog cov thee tar yog cov khoom siv hluavtaws, whereas bitumen yog ib yam khoom tshwm sim.
Ob qho tib si thee tar thiab bitumen tuaj yeem pom tau tias yog cov dej tsaus, tuab, kua nplaum heev. Cov no feem ntau yog tsim los ntawm carbon. Bitumen, tseem hu ua asph alt, tuaj yeem pom ib txwm muaj lossis nws tshwm sim raws li cov khoom lag luam ntawm cov txheej txheem refining.
Coal Tar yog dab tsi?
Coal tar yog ib qho dej tsaus, tuab uas tsim los ntawm kev tsim cov coke los ntawm cov thee. Cov kua no muaj ob qho tib si kev kho mob thiab kev lag luam siv. Coal tar yog siv rau hauv cov tshuaj vim nws cov khoom tseem ceeb xws li tshuaj tua kab mob, tiv thaiv kab mob, tiv thaiv khaus, thiab tshuaj tiv thaiv kab mob. Hauv cov ntawv thov kev lag luam, thee tar yog qhov tseem ceeb vim tias nws cov nplaim taws thiab muaj peev xwm sib khi.
Daim duab 01: Kev faib tawm ntawm Bituminous Coal
Ob lub npe lag luam loj ntawm cov tar yog Balnetar thiab Cutar. Coal tar tau tsim nyob rau hauv 1665, raws li ib feem tseem ceeb ntawm cov tshuaj. Raws li WHO cov npe, thee tar yog ib qho tshuaj zoo tshaj plaws thiab zoo tshaj plaws. Feem ntau, thee tar yog ib qho tseem ceeb ntawm cov tshuaj zawv plaub hau, xab npum, thiab tshuaj pleev. Cov txheej txheem ntawm kev tswj hwm yog tshuaj. Qhov ntawd txhais tau tias; peb tuaj yeem siv rau ntawm daim tawv nqaij lossis plaub hau. Nws yog siv los kho mob dandruff thiab psoriasis. Tsis tas li ntawd, nws tuaj yeem tua lossis tua cov ntshauv. Nyob rau hauv kev siv tshuaj, thee tar yog siv nyob rau hauv ib qho ntawm ob hom: raws li cov thee crude tar los yog cov thee tar tov.
Tsis tas li ntawd, thee tar yog qhov tseem ceeb hauv kev tsim kho thiab lwm yam kev lag luam. Hauv cov chaw tsim kho, thee tar yog hu ua tus neeg sawv cev sealing; nws feem ntau yog siv los ntawm kev koom ua ke rau hauv chaw nres tsheb-chaw foob cov khoom siv. Hauv cov ntawv thov kev lag luam, nws yog siv rau hauv boilers rau cua sov vim qhov hluav taws kub ntawm cov hluav taws xob tar.
Txawm li cas los xij, muaj qee qhov kev mob tshwm sim ntawm kev siv thee tar hauv cov khoom sib txawv. Cov kev mob tshwm sim feem ntau muaj xws li tawv nqaij khaus, tshav rhiab heev, kev tsis haum tshuaj, thiab daim tawv nqaij discoloration.
Bitumen yog dab tsi?
Bitumen, tseem hu ua asph alt, yog ib txwm tshwm sim tsaus, cov kua tuab uas muaj kuab heev thiab nplaum. Qee zaum nws tuaj yeem pom nyob rau hauv lub xeev ib nrab thiab. Lwm yam tshaj li nyob rau hauv natural deposits, bitumen cov ntaub ntawv raws li ib tug byproduct nyob rau hauv refining txheej txheem. Daim ntawv tshwm sim ntawm bitumen feem ntau hu ua "Crude bitumen". Nws muaj viscosity zoo ib yam li cov viscosity ntawm txias molasses. Cov ntaub ntawv hluavtaws ntawm bitumen yog hu ua "refined bitumen", uas yog tau los ntawm cov fractional distillation ntawm cov roj crude ntawm qhov kub thiab txias.
Daim duab 02: Solidified Natural Bitumen
Kev thov loj ntawm bitumen yog hauv kev tsim kho. Ntawm no, bitumen yog cov kua nplaum los yog binder uas yog tov nrog aggregates los tsim asph alt pob zeb. Tsis tas li ntawd, nws yog siv los tsim ib co waterproofing khoom xws li sealing lub ru tsev tiaj tus. Daim ntawv thov ntawm bitumen yog nyob rau hauv kev tsim kho ntawm txoj kev loj, tshav dav hlau runways, tsheb nres, tennis tsev hais plaub, ru tsev, pas dej ua ke, yeeb nkab txheej, thiab lwm yam.
Qhov txawv ntawm Coal Tar thiab Bitumen yog dab tsi?
Coal tar yog cov kua tsaus, tuab uas tsim los ntawm cov txheej txheem ntawm kev tsim cov coke los ntawm cov thee. Bitumen, ntawm qhov tod tes, yog ib qho tshwm sim tsaus ntuj, cov kua tuab uas muaj kuab heev thiab nplaum. Qhov sib txawv tseem ceeb ntawm cov thee tar thiab bitumen yog cov thee tar yog cov khoom siv hluavtaws, hos bitumen yog ib yam khoom tshwm sim.
Ntxiv mus, thee tar yog ib qho khoom lag luam hauv cov txheej txheem ntawm kev tsim cov coke los ntawm cov thee thaum bitumen yog ib qho byproduct nyob rau hauv fractional distillation ntawm cov roj crude.
Hauv qab infographic qhia txog qhov sib txawv ntawm cov thee tar thiab bitumen.
Summary – Coal Tar vs Bitumen
Ob lub thee tar thiab bitumen yog qhov tsaus, cov kua tuab uas muaj viscosity siab. Qhov sib txawv tseem ceeb ntawm cov thee tar thiab bitumen yog cov thee tar yog cov khoom siv hluavtaws, whereas bitumen yog ib yam khoom tshwm sim.
Image Courtesy:
1. "Derivation of the coal-tar creosote" Los ntawm Brian Shapiro - Hloov los ntawm qhov chaw, p.12: Nqe, Overton W.; Kellogg, R. S.; Cox, W. T. (1909). Hav zoov ntawm Tebchaws Meskas: Lawv Siv. Tsoom fwv luam ntawv chaw ua hauj lwm. (CC0) ntawm Commons Wikimedia
2. "Bitumen" Los ntawm Daniel Tzvi - Tus kheej ua haujlwm (Public Domain) ntawm Commons Wikimedia
