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Production of H 2 and medium heating value gas via steam gasification of lignins in fixed‐bed reactors
Author(s) -
Ferdous Deena,
Dalai Ajay K.,
Bej Shyamal K.,
Thring Ronald W.
Publication year - 2001
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450790609
Subject(s) - lignin , kraft paper , catalysis , heat of combustion , chemistry , volumetric flow rate , pulp and paper industry , sulfur , chemical engineering , materials science , organic chemistry , composite material , combustion , thermodynamics , physics , engineering
In this work, steam gasification of Alcell and Kraft lignins were carried out in a fixed‐bed reactor in order to produce H 2 and medium heating value gas. The conversion of lignins increased from a low of 64 wt% for Alceil lignin to a high of 88 wt% for Kraft lignin with increasing steam flow rate and temperature. Maximum H 2 production of 60.7 mol% was obtained at 800°C and at a steam flow rate of 15 g/h/g of Kraft lignin, whereas maximum heating value of 18000 kl/m 3 of the product gas was obtained at 650°C and at 5 g/h/g of Alcell lignin. Also, the performance of a Ni‐based steam reforming catalyst for the production of H 2 was studied for both types of lignin in a dual fixed‐bed reaction system. A maximum H 2 production of 63 mol% was obtained at a catalyst bed temperature of 750°C and at a catalyst loading of 0.3 g for Alcell lignin. The sulfur present in Kraft lignin had detrimental effect on the catalyst performance.