Gas yog ib lo lus dav dav rau cov roj hluav taws xob uas hlawv thiab tawm hluav taws xob siv los ntawm cov neeg nyob hauv nroog thiab cov chaw lag luam. Muaj ntau ntau hom roj av, feem ntau yog cov pa roj carbon monoxide, cov roj hluavtaws, cov roj av liquefied thiab biogas.

Muaj 4 hom roj hauv lub zos: Nqus Gas, Artificial Gas, Liquefied Petroleum Gas, Hloov Natural Gas

1. Liquefied Petroleum Gas:

LPG yog tsim los ntawm cov roj refineries thaum lub sij hawm tawg ntawm cov roj extraction, nws cov khoom tseem ceeb yog propane thiab butane, nrog me me ntawm propylene thiab butene.

2. Hloov Cov Khoom Siv Hluav Taws Xob:

LPG yog rhuab thiab volatilized rau hauv lub xeev gaseous nyob rau hauv cov khoom tshwj xeeb, thiab tib lub sij hawm ib tug kom muaj nuj nqis ntawm cov huab cua (kwv yees li 50%) yog tov nyob rau hauv kom nthuav nws ntim, dilute nws concentration thiab txo nws cov nqi calorific thiaj li hais tias nws muaj peev xwm muab tau raws li ib tug loj npaum li cas ntawm cov khoom. natural gas.

3. Artificial Gas:

Gases ua los ntawm cov khoom siv roj xws li thee thiab coke lossis kua roj xws li roj hnyav los ntawm cov txheej txheem xws li qhuav distillation, vaporization lossis tawg, uas nws cov khoom tseem ceeb yog hydrogen, nitrogen, carbon monoxide thiab carbon dioxide.

4. Natural Gas:

Cov pa hluav taws xob uas muaj nyob hauv av yog hu ua cov pa roj carbon monoxide thiab feem ntau yog tsim los ntawm methane, tab sis kuj muaj me me ntawm ethane, butane, pentane, carbon dioxide, carbon monoxide, hydrogen sulfide, thiab lwm yam.

Muaj tsib hom roj av, nyob ntawm seb lawv tsim thiab rho tawm li cas:

1. Ntshiab natural gas: Natural gas yog muab rho tawm los ntawm underground teb.

2. Roj-npaum roj av Gas: Hom roj no yog muab rho tawm los ntawm ib daim ntawm cov roj yog hu ua roj-ssociated gas.

3. Mine gas: Cov roj av yog sau thaum lub sij hawm cov thee mining.

4. Condensate field gas: Gas uas muaj lub teeb feem ntawm cov roj av.

5. Coalbed methane Mine gas: Nws yog muab rho tawm los ntawm underground coal seams

Thaum xa cov pa roj,gas pipeline pob li qubyog siv los tswj cov chaw nres tsheb roj av, thaumgas meter li qubyog siv los tswj cov roj hauv tsev.