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Production of hydrogen by steam gasification from lignin with Al2O3·Na2O·xH2O/NaOH/Al(OH)3 catalyst

✍ Scribed by Shen SU; Wen LI; Zong-qing BAI; Hong-wei XIANG; Jin BAI

Publisher
Elsevier
Year
2010
Tongue
Chinese
Weight
223 KB
Volume
38
Category
Article
ISSN
1872-5813

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✦ Synopsis

Some influencing factors on hydrogen production from steam gasification of lignin with

in a fixed bed reactor were examined. The results show that the formation rates of hydrogen increase with increasing ratio of Na 2 O/C and ratio of vapor to lignin as a whole. Higher flow rate of vapor is conducive to inhibit the generation of CO and CO 2 at lower temperature. H 2 O(g) produced by the hydrates contained in the catalyst can bring on more Na + and OH -ions to be formed by dissociation of NaOH within the catalyst. This leads to more remarkable reduction of the C-H bond energies of lignin. The conversion degree of hydrogen of lignin at 473-973 K reaches 134.94%, which shows that the present catalyst has good catalytic activity on hydrogen production from steam gasification of lignin at low temperature.

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