去壳
催化作用
碳化作用
制氢
化学
煅烧
流化床
核化学
吸附
甲烷
氢
蒸汽重整
化学工程
有机化学
植物
生物
工程类
作者
Xi Zeng,Mengxiang Fang,Yu Shan,Tong Lv,Jianmeng Cen,Qinhui Wang,Kaige Wang
标识
DOI:10.1016/j.ijhydene.2022.12.218
摘要
Hydrogen production from rice husk was carried out via a two-stage system combining CLG (calcium looping gasification) using Ca(OH)2 adsorbent in a bubbling fluidized bed and catalytic reforming with Ce–Ni/γAl2O3 catalyst in a connected fixed bed. The results show that the maximum H2 concentration (69.16 vol%) and H2 yield (11.86 mmol g−1rice husk) are achieved at Ca/C (Ca(OH)2 to carbon molar ratio) = 1.5, H2O/C (H2O to carbon molar ratio) = 1.5, Tg (gasification temperature) = 500 °C, Tc (catalytic temperature) = 800 °C. The supplementation of fresh Ca(OH)2 at Ca/C of 0.5 during calcination helps to activate the regenerated CaO by hydration, maintaining its carbonation activity and CO2 adsorption. Ce–Ni/γAl2O3 catalyst promotes water gas shift (WGS), steam methane reforming (SMR), and C2–C3 hydrocarbons reforming, also exhibits excellent activity stability to maintain H2 concentration and H2 yield above 67.21 vol% and 11.67 mmol g−1rice husk, respectively, during 5 lifetime tests.
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