Qhov sib txawv tseem ceeb ntawm cov thee dub thiab xim av yog cov thee dub muaj qhov sib piv ntawm cov hmoov tshauv thiab noo noo tsawg dua cov xim av xim av.
Coal yog cov roj fossil zoo ib yam li cov nkev thiab roj thiab yog nyob rau hauv daim ntawv pob zeb. Coal cov ntaub ntawv los ntawm cov nroj tsuag khib nyiab uas sau nyob rau hauv swamps. Cov txheej txheem no siv sijhawm ntau txhiab xyoo. Thaum cog cov ntaub ntawv sau rau ntawm swamps, lawv degrade qeeb heev. Feem ntau, dej swamp tsis muaj cov pa oxygen siab; Yog li ntawd, microorganism ntom ntom muaj tsawg, uas ua rau tsawg kawg degradation los ntawm microorganisms. Nroj tsuag khib nyiab accumulates hauv swamps vim qhov no qeeb qeeb. Thaum cov no tau faus rau hauv cov xuab zeb lossis av nkos, lub siab thiab qhov kub thiab txias hauv cov nroj tsuag hloov mus rau cov thee maj mam. Coal yog suav hais tias yog ib qho khoom siv tsis tau txuas ntxiv dua tshiab. Qhov no yog vim thaum peb khawb cov thee thiab siv nws, nws tsis rov tsim dua yooj yim dua.
Dub Coal yog dab tsi?
Black thee, tseem hu ua bituminous thee, yog ib hom thee uas muaj cov tshuaj zoo li lub npe hu ua bitumen. Qee lub sij hawm, cov khoom no tshwm sim xim av tsaus thaum nws feem ntau yog xim dub hauv qhov xwm txheej. Nws muaj qhov zoo-txhais bands ntawm cov khoom ci thiab npub hauv nws cov seams. Feem ntau, nws nyuaj thiab friable.
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. Bitumen kuj ua raws li cov khoom lag luam hauv cov txheej txheem refining. 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 tau txais los ntawm fractional distillation ntawm cov roj crude ntawm qhov kub thiab txias.
Daim duab 01: Dub Coal
Feem ntau, hom thee no tseem ceeb hauv kev tsim hluav taws xob thiab hauv kev lag luam steel. Cov tshuaj no kuj tsim nyog rau smelting hlau, uas yuav tsum tsis muaj leej faj thiab phosphorous. Ntxiv mus, cov khoom no hais kom tus nqi siab piv rau lwm qib ntawm cov thee dub uas muaj txiaj ntsig zoo hauv kev ua cua sov thiab lub zog tsim hluav taws xob.
Cov thee dub tuaj yeem tso cov hluav taws kub ntau hauv kev lag luam thee mining. Firedamp yog qhov sib tov txaus ntshai ntawm cov pa roj uas yuav ua rau tawg hauv av. Tsis tas li ntawd, kev rho tawm ntawm cov thee dub xav tau cov txheej txheem kev nyab xeeb siab, uas koom nrog kev saib xyuas roj, kev ua pa zoo, thiab kev tswj xyuas qhov chaw ceev faj.
Brown Coal yog dab tsi?
Brown thee lossis lignite yog mos, xim av, combustible sedimentary pob zeb uas tsim los ntawm ib txwm compressed peat. Cov khoom no muaj li ntawm 25-35% carbon ntsiab lus. Nws raug suav hais tias yog ib qho ntawm cov qib qis tshaj ntawm cov thee vim tias nws muaj cov ntsiab lus kub tsawg. Peb tuaj yeem mine lignite thoob plaws ntiaj teb thiab, nws yog qhov tseem ceeb rau kev tsim hluav taws xob hluav taws xob.
Daim duab 02: Brown Coal
Cov ntsiab lus noo noo ntawm lignite yog li 75%, thaum cov hmoov tshauv nyob ntawm 6 - 19%. Yog li, cov ntsiab lus carbon ntawm cov khoom no feem ntau yog li 25-35%. Txawm li cas los xij, lub zog cov ntsiab lus tsim los ntawm cov khoom siv no tuaj yeem nyob ntawm 10 txog 20 MJ / Kg. Cov ntsiab lus ntawm volatile teeb meem nyob rau hauv xim av coal yog comparatively siab. Nws ua rau nws yooj yim dua los hloov mus rau hauv cov khoom siv roj thiab kua roj piv rau cov qib siab dua.
Kev siv cov xim av xim av yog qhov tsim hluav taws xob, thaum muaj qee qhov kev siv xws li kev siv hauv kev ua liaj ua teb, hauv kev lag luam tshuaj, hauv kev lag luam hniav nyiaj hniav kub, ua roj, ua cov khoom siv adsorbent, thiab lwm yam..
Qhov txawv ntawm Dub thiab Xim av Coal yog dab tsi?
Dub thee tseem hu ua bituminous thee, thiab nws yog ib hom thee uas muaj cov khoom zoo li tar hu ua bitumen. Brown thee los yog lignite yog mos, xim av, combustible sedimentary pob zeb uas tsim los ntawm ib txwm compressed peat. Qhov sib txawv tseem ceeb ntawm cov xim dub thiab xim av yog cov xim dub dub muaj qhov sib piv cov ntsiab lus ntawm cov hmoov tshauv thiab noo noo, thaum cov xim av xim av muaj cov ntsiab lus sib piv ntawm cov tshauv thiab noo noo.
Cov duab hauv qab no nthuav tawm qhov sib txawv ntawm cov xim dub thiab xim av hauv daim ntawv tabular rau ib sab ntawm kev sib piv.
Summary – Dub vs Brown Coal
Dub thee tseem hu ua bituminous thee, thiab nws yog ib hom thee uas muaj cov khoom zoo li tar hu ua bitumen. Brown thee los yog lignite yog mos, xim av, combustible sedimentary pob zeb uas tsim los ntawm ib txwm compressed peat. Qhov sib txawv tseem ceeb ntawm cov xim dub thiab xim av yog cov xim dub dub muaj cov ntsiab lus tsis tshua muaj tshauv thiab noo noo ntau dua li cov xim av xim av.
