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煤炭制氫原理

2015-01-29 點擊數：2197
煤炭制氫是以煤炭為還原劑，水蒸汽為氧化劑，在高溫下將碳轉化為CO好H2為主的合成氣，然后經過煤氣凈化、CO轉化以及H2提純等主要生產環節生產氫氣。煤炭可以經過各種不同的汽化處理，如流化床、噴流床、固定床等實現煤炭制氫。煤炭制氫的基本原理可用化學反應方程式表現出來?；瘜W反應過程為： C(s)+H2O+heat→CO+H2  

此反應過程為吸熱過程，重整過程需要額外的熱量，煤炭與空氣燃燒放出的熱量提供了反應所需要的熱量。產物中CO再通過水氣轉移反應被進一步轉化為CO2和H2化學反應過程為:CO+H2O→CO2+H2+熱

煤炭制氫技術已經相當成熟，已經被商品化，但是這種制氫過程比較復雜，制氫成本高，制備過程中生產的CO2可以造成地球的溫室效應。但是由于世界煤炭儲量豐富，這種方法仍作為氫氣的主要制取方法。
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