Production of hydrogen by steam gasification of dehydrochlorinated poly(vinyl chloride) or activated carbon in the presence of various alkali compounds

Tohru Kamo; Kanji Takaoka; Junichiro Otomo; Hiroshi Takahashi

doi:10.1007/s10163-006-0152-y

Production of hydrogen by steam gasification of dehydrochlorinated poly(vinyl chloride) or activated carbon in the presence of various alkali compounds

Tohru Kamo^*, Kanji Takaoka, Junichiro Otomo, Hiroshi Takahashi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

Steam gasification of dehydrochlorinated poly(vinyl chloride) (PVC) or activated carbon was carried out in the presence of various alkali compounds at 3.0∈MPa and 560°C-660°C in a batch reactor or in a semi-batch reactor with a flow of nitrogen and steam. Hydrogen and sodium carbonate were the main products and methane and carbon dioxide were the minor products. Yields of hydrogen were high in the presence of sodium hydroxide and potassium hydroxide. The acceleration effect of the alkali compounds on the gasification reaction was as follows: KOH > NaOH > Ca(OH)₂ > Na ₂CO₃. The rate of gasification increased with increasing partial steam pressure and NaOH/C molar ratio. However the rate became saturated at a molar ratio of NaOH/C greater than 2.0.

Original language	English
Pages (from-to)	109-115
Number of pages	7
Journal	Journal of Material Cycles and Waste Management
Volume	8
Issue number	2
DOIs	https://doi.org/10.1007/s10163-006-0152-y
Publication status	Published - 2006 Sept
Externally published	Yes

Keywords

Alkali compounds
Hydrogen
PVC
Sodium hydroxide
Steam
Waste

ASJC Scopus subject areas

Waste Management and Disposal
Mechanics of Materials

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10.1007/s10163-006-0152-y

Cite this

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title = "Production of hydrogen by steam gasification of dehydrochlorinated poly(vinyl chloride) or activated carbon in the presence of various alkali compounds",

abstract = "Steam gasification of dehydrochlorinated poly(vinyl chloride) (PVC) or activated carbon was carried out in the presence of various alkali compounds at 3.0∈MPa and 560°C-660°C in a batch reactor or in a semi-batch reactor with a flow of nitrogen and steam. Hydrogen and sodium carbonate were the main products and methane and carbon dioxide were the minor products. Yields of hydrogen were high in the presence of sodium hydroxide and potassium hydroxide. The acceleration effect of the alkali compounds on the gasification reaction was as follows: KOH > NaOH > Ca(OH)2 > Na 2CO3. The rate of gasification increased with increasing partial steam pressure and NaOH/C molar ratio. However the rate became saturated at a molar ratio of NaOH/C greater than 2.0.",

keywords = "Alkali compounds, Hydrogen, PVC, Sodium hydroxide, Steam, Waste",

author = "Tohru Kamo and Kanji Takaoka and Junichiro Otomo and Hiroshi Takahashi",

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AU - Kamo, Tohru

AU - Takaoka, Kanji

AU - Otomo, Junichiro

AU - Takahashi, Hiroshi

PY - 2006/9

Y1 - 2006/9

N2 - Steam gasification of dehydrochlorinated poly(vinyl chloride) (PVC) or activated carbon was carried out in the presence of various alkali compounds at 3.0∈MPa and 560°C-660°C in a batch reactor or in a semi-batch reactor with a flow of nitrogen and steam. Hydrogen and sodium carbonate were the main products and methane and carbon dioxide were the minor products. Yields of hydrogen were high in the presence of sodium hydroxide and potassium hydroxide. The acceleration effect of the alkali compounds on the gasification reaction was as follows: KOH > NaOH > Ca(OH)2 > Na 2CO3. The rate of gasification increased with increasing partial steam pressure and NaOH/C molar ratio. However the rate became saturated at a molar ratio of NaOH/C greater than 2.0.

AB - Steam gasification of dehydrochlorinated poly(vinyl chloride) (PVC) or activated carbon was carried out in the presence of various alkali compounds at 3.0∈MPa and 560°C-660°C in a batch reactor or in a semi-batch reactor with a flow of nitrogen and steam. Hydrogen and sodium carbonate were the main products and methane and carbon dioxide were the minor products. Yields of hydrogen were high in the presence of sodium hydroxide and potassium hydroxide. The acceleration effect of the alkali compounds on the gasification reaction was as follows: KOH > NaOH > Ca(OH)2 > Na 2CO3. The rate of gasification increased with increasing partial steam pressure and NaOH/C molar ratio. However the rate became saturated at a molar ratio of NaOH/C greater than 2.0.

KW - Alkali compounds

KW - Hydrogen

KW - PVC

KW - Sodium hydroxide

KW - Steam

KW - Waste

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Production of hydrogen by steam gasification of dehydrochlorinated poly(vinyl chloride) or activated carbon in the presence of various alkali compounds

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

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