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Title: High-yield hydrogen production by catalytic gasification of coal or biomass

Abstract

Gasification of coal or wood, catalyzed by soluble metallic cations to maximize reaction rates and hydrogen yields, offers a potential for large-scale, economical hydrogen production with near-commercial technology. With optimum reaction conditions and catalysts, product gas rich in both hydrogen and methane can be used in fuel cells to produce electricity at efficiencies nearly double those of conventional power plant. If plantation silvaculture techniques can produce wood at a raw energy cost competitive with coal, further enhancement of product gas yields may be possible, with zero net contribution of CO{sub 2} to the atmosphere.

Authors:
Publication Date:
Research Org.:
North Dakota Univ., Grand Forks, ND (United States). Energy and Environmental Research Center
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
5687828
Report Number(s):
DOE/MC/10637-92/C0002; CONF-920643-2
ON: DE92008770
DOE Contract Number:
FC21-86MC10637
Resource Type:
Conference
Resource Relation:
Conference: 9. world hydrogen energy conference, Paris (France), 22-25 Jun 1992
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 09 BIOMASS FUELS; 08 HYDROGEN; BIOMASS; GASIFICATION; CATIONS; CATALYTIC EFFECTS; METALS; METHANE; SYNTHESIS; COAL GASIFICATION; HYDROGEN PRODUCTION; ALKANES; CHARGED PARTICLES; ELEMENTS; ENERGY SOURCES; HYDROCARBONS; IONS; ORGANIC COMPOUNDS; RENEWABLE ENERGY SOURCES; THERMOCHEMICAL PROCESSES; 010404* - Coal, Lignite, & Peat- Gasification; 090900 - Biomass Fuels- Processing- (1990-); 080107 - Hydrogen- Production- Coal Gasification

Citation Formats

Hauserman, W.B.. High-yield hydrogen production by catalytic gasification of coal or biomass. United States: N. p., 1992. Web.
Hauserman, W.B.. High-yield hydrogen production by catalytic gasification of coal or biomass. United States.
Hauserman, W.B.. Wed . "High-yield hydrogen production by catalytic gasification of coal or biomass". United States. doi:. https://www.osti.gov/servlets/purl/5687828.
@article{osti_5687828,
title = {High-yield hydrogen production by catalytic gasification of coal or biomass},
author = {Hauserman, W.B.},
abstractNote = {Gasification of coal or wood, catalyzed by soluble metallic cations to maximize reaction rates and hydrogen yields, offers a potential for large-scale, economical hydrogen production with near-commercial technology. With optimum reaction conditions and catalysts, product gas rich in both hydrogen and methane can be used in fuel cells to produce electricity at efficiencies nearly double those of conventional power plant. If plantation silvaculture techniques can produce wood at a raw energy cost competitive with coal, further enhancement of product gas yields may be possible, with zero net contribution of CO{sub 2} to the atmosphere.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 01 00:00:00 EST 1992},
month = {Wed Jan 01 00:00:00 EST 1992}
}

Conference:
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  • Hydrothermal processing can be used to treat wet biomass by converting the organic contaminants to gases. When the system is operated as a metal catalyzed process at nominally 350°C and 21 MPa (so-called low-temperature gasification), it can produce a methane/carbon dioxide product gas from water slurries of biomass. This process can be utilized for both waste disposal and energy recovery. Catalyst stability in an aqueous processing environment is a major hurdle for use of such a system. Development of useful catalyst formulations has been achieved through bench-scale process development work. Catalyst lifetimes in excess of 5000h have been shown. Protectionmore » of the catalyst from feedstock impurities is a second major issue, which is more prominent in the biomass applications. Systems are under development to address mineral matter and sulfur contaminants.« less
  • Steam gasification of the HyperCoals (ash-free coal extracts) with the physical addition of 5.8%-6.0% K{sub 2}CO{sub 3} was conducted at 1023 K on a thermogravimetric apparatus that was equipped with an on-line quadrupole mass spectrometer. The catalytic gasification of the HyperCoals demonstrated a much higher gasification rate than the catalytic gasification of the raw coals. Interactions of K{sub 2}CO{sub 3} with mineral matter in the raw coal formed water-insoluble potassium compounds, such as potassium aluminosilicates, and reduced the catalytic activity, whereas no such negative reactions occurred for the HyperCoals. The steam gasification of the HyperCoals with K{sub 2}CO{sub 3} wasmore » also determined to be favorable for the high-yield production of hydrogen. From these experimental results, the catalytic steam gasification of HyperCoal would potentially be a more efficient process for the production of hydrogen in the future. 30 refs., 6 figs., 2 tabs.« less
  • High-temperature steam gasification of paper, yellow pine woodchips, and Pittsburgh bituminous coal was investigated in a batch-type flow reactor at temperatures in the range of 700 to 1,200{sup o}C at two different ratios of steam to feedstock molar ratios. Hydrogen yield of 54.7% for paper, 60.2% for woodchips, and 57.8% for coal was achieved on a dry basis, with a steam flow rate of 6.3 g/min at steam temperature of 1,200{sup o}C. Yield of both the hydrogen and carbon monoxide increased while carbon dioxide and methane decreased with the increase in gasification temperature. A 10-fold reduction in tar residue wasmore » obtained at high-temperature steam gasification, compared to low temperatures. Steam and gasification temperature affects the composition of the syngas produced. Higher steam-to-feedstock molar ratio had negligible effect on the amount of hydrogen produced in the syngas in the fixed-batch type of reactor. Gasification temperature can be used to control the amounts of hydrogen or methane produced from the gasification process. This also provides mean to control the ratio of hydrogen to CO in the syngas, which can then be processed to produce liquid hydrocarbon fuel since the liquid fuel production requires an optimum ratio between hydrogen and CO. The syngas produced can be further processed to produce pure hydrogen. Biomass fuels are good source of renewable fuels to produce hydrogen or liquid fuels using controlled steam gasification.« less
  • The purpose of the project is to evaluate the technical and economic feasibility of producing specific gas products via the catalytic gasification of biomass. The results of research conducted from October 1980 to November 1982 are presented. The project was comprised of laboratory studies, process development, and economic analyses. The laboratory studies were conducted to develop operating conditions and catalyst systems for generating methane-rich gas, synthesis gases, hydrogen, and carbon monoxide. The process development unit (PDU), previously used for tests at atmospheric pressure, was modified for operation at absolute pressures of up to 10 atm (1000 kPa). A program formore » use on a microcomputer was written to determine the effect of yield changes at elevated pressures on process economics.« less