Hydrogen Production by High Density Polyethylene Steam Gasification and In-Line Volatile Reforming

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• 作者：Gartzen Lopez ; Aitziber Erkiaga ; Maite Artetxe ; Maider Amutio ; Javier Bilbao ; Martin Olazar
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2015
• 出版时间：October 7, 2015
• 年：2015
• 卷：54
• 期：39
• 页码：9536-9544
• 全文大小：590K
• ISSN：1520-5045

文摘

Steam gasification (900 掳C) of high density polyethylene (HDPE) in a conical spouted bed reactor (CSBR) followed by steam reforming in a fixed bed reactor (Ni commercial catalyst) has been carried out. The effect reforming temperature in the 600鈥?00 掳C range has on product yields and gas composition as well as on the amount and nature of the coke deposited on the catalyst has been studied. The reforming leads to a full transformation of C₂₊ hydrocarbons and tar. The maximum H₂ yield is obtained at 700 掳C (36 wt % by mass unit of HDPE in the feed, which accounts for 83 wt % of the maximum H₂ yield according to stoichiometry), with CH₄ conversion being 94% and the coke amount deposited on the Ni catalyst being minimum (3.3 wt % by mass unit of HDPE in the feed). The syngas obtained by reforming at 700 掳C has a H₂/CO volumetric ratio of 6 and is suitable for hydrogenation reactions and further valorization to produce H₂.