金属元素对生物质一体化制氢的影响

doi:10.3969/j.issn.0253-2417.2018.01.010

Abstract

Abstract: The effects of different metals (K,Ca,Mg,Fe,Zn) on hydrogen yield,gas composition and carbon conversion were studied based on the integrated hydrogen production process from corn cob.The catalytic activities of different metal elements were found as the following sequence:K > Fe > Mg > Ca > Zn.Particularly,K showed the best catalytic effect with the carbon conversion of 85.65% and then,the effects of K on pyrolysis and gasification processes were discussed in detail.The results showed that the addition of K could promote the conversion of biomass during pyrolysis and gas-solid simultaneous gasification process.The carbon conversion were improved by 5.31 and 10.30 percent points in each step,respectively.Potential hydrogen yield of 86.97 g/kg and carbon conversion of 90.11% were achieved under the pyrolysis temperature of 600℃ and gas-solid simultaneous gasification temperature of 850℃.With the increase of temperature,the yield of biomass carbon decreased and the loss of K increased,which reached 13.56% and 74.44%,respectively at 850℃.

Key words: biomass, metal elements, pyrolysis

CLC Number:

TQ35
TK6

DING Ding, YAN Bochao, ZHANG Suping. Effect of Metal Elements on Integrated Process for Hydrogen Production from Biomass[J]. Chemistry and Industry of Forest Products, 2018, 38(1): 66-72.

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Effect of Metal Elements on Integrated Process for Hydrogen Production from Biomass

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