The Hawaiian project

Lau, F.S.

doi:10.1016/s0961-9534(98)00017-8

Cited by 18 publications

(8 citation statements)

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“…Recent operation of the Värnamo facility in Sweden showed that hot gas ceramic and metal candle filters can effectively clean the product gas. Similar results were also obtained in limited tests at the gasifier demonstration in Hawaii (Lau, 1998;Wiant, et al, 1997Wiant, et al, , 1994aWiant, et al, , 1994b. These filtration systems, which are used extensively in other systems, appear to be suitable for biomass systems.…”

Section: Systems Producing Warm or Hot Fuel Gases With Significant Gasupporting

confidence: 60%

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Hot Gas Conditioning: Recent Progress with Larger-Scale Biomass Gasification Systems; Update and Summary of Recent Progress

Stevens¹

2001

131

105

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As a result of environmental and policy considerations, there is increasing interest in using renewable biomass resources as feedstock for power, fuels, and chemicals and hydrogen. Biomass gasification is seen as an important technology component for expanding the use of biomass. Advanced biomass gasification systems provide clean products that can be used as fuel or synthesis gases in a variety of environmentally friendly processes.Advanced end-use technologies such as gas turbines or synthesis gas systems require high quality gases with narrowly defined specifications. Other systems such as boilers may also have fuel quality requirements, but they will be substantially less demanding. The gas product from biomass gasifiers contains quantities of particulates, tars, and other constituents that may exceed these specified limits. As a result, gas cleaning and conditioning will be required in most systems.Over the past decade, significant research and development activities have been conducted on the topic of gas cleanup and conditioning. This report provides an update of efforts related to large-scale biomass gasification systems and summarizes recent progress. Remaining research and development issues are also summarized.

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Section: Systems Producing Warm or Hot Fuel Gases With Significant Gasupporting

confidence: 60%

“…Ceramic candle filters were also tested at a research and development gasifier facility in Hawaii in the mid-1990's (Wiant, 1998(Wiant, , 1994a(Wiant, , 1994bLau, 1998). In that demonstration facility, gas was produced at about 980 °C, and a slip-stream was diverted to a hot-gas cleanup unit.…”

Section: Barrier Filtersmentioning

confidence: 99%

Hot Gas Conditioning: Recent Progress with Larger-Scale Biomass Gasification Systems; Update and Summary of Recent Progress

Stevens¹

2001

131

105

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“…It is possible to reach temperatures from 800 to 1000 C [22]. However, the entering biomass must have a maximum dryness of 80 % [23].…”

Section: Circulating Fluidized Bedsmentioning

confidence: 99%

Thermal Gasification: A Feasible Solution for Sewage Sludge Valorisation?

Ferrasse

Seyssiecq

Roche³

2003

Chem Eng & Technol

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The proliferation of wastewater treatment plants has become essential to ensure the protection of the natural environment. As a consequence, the production of waste by‐products, namely sewage sludge, has increased together with both the unit efficiency levels and with the number of wastewater treatment plants. Since dumping is no longer allowed in the EU, the processes mainly used to treat sewage sludge are agricultural spreading and incineration. However, due to the constant increase in production, it has became essential to find alternative methods of treatment. Considering the chemical composition of sludge, some new thermal processes of treatment have recently been considered by researchers. Thermal gasification is one method that could be of significant interest. Dried sludge composition is sufficiently close to the that of classical biomass (such as wood, rice, etc.) to make sludge treatment in a gasifier feasible. In this paper we discuss how gasification technologies could be transposed to the treatment and valorisation of sludge. Although this process seems attractive, it will also be demonstarted that much experimentation remains to be conducted on a laboratory and pilot scale.

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“…L'agent oxydant utilisé va influencer de façon importante la composition des gaz produits [15] . On peut distinguer les cas où l'agent oxydant contient de l'oxygène (air, oxygène pur), des autres cas (vapeur d'eau, absence d'agent donc pyrolyse).…”

Section: L'agent Oxydantunclassified

Les procédés de gazéification comme alternative pour la valorisation de boues de stations d'épuration des eaux usées

Ferrasse¹,

Seyssiecq²,

Roche³

2003

Environnement, Ingénierie &Amp; Développement

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The problem of wastewater treatment plant sewage sludge is becoming crucial. Indeed the quantity of sewage sludge will increase with the population and the economic developments, the rise of the number of treatment plants and their better performance. Sewage sludge treatment is at the moment realized in limited ways. Whatever the future of those ways and without creating polemics, they will not be able, to absorb this increasing volume. It consequently becomes necessary to diversify the methods of treatment to answer the problems arising from the management of this waste. Within this framework, the new thermochemical ways of treatment by valorization seems more interesting. Indeed, they present in addition to the advantage of the possibility of processing, the capacity to easily produce "storable" and valuable compounds. Thus will treat, in this article, the interest to develop the processes of gasification of waste water sewage sludge. Le devenir des boues de stations d'épuration des eaux usées (Step) est un problème crucial posé aux pays industrialisés. En effet la quantité de boues produite en Step ne va cesser d’augmenter avec les croissances démographique et économique, ainsi que le nombre et la performance des Step des eaux usées. Actuellement, le traitement des boues de Step se fait par différentes filières, dont le nombre est limité. Quel que soit le devenir de ces filières et sans créer de polémiques particulières elles ne pourront, dans tous les cas, pas absorber ce volume croissant. Il devient dès lors nécessaire de diversifier les méthodes de traitement pour répondre aux problèmes posés par la gestion de ce déchet. Dans ce cadre, les nouvelles filières de traitement par valorisation thermochimiques semblent des plus intéressantes. En effet, elles présentent en plus de la capacité de traitement, l’avantage de produire des composés « stockables » et facilement «valorisables». Nous traiterons ainsi, dans cet article, de l'intérêt de développer les procédés de gazéification des boues de Step.

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The Hawaiian project

Cited by 18 publications

References 0 publications

Hot Gas Conditioning: Recent Progress with Larger-Scale Biomass Gasification Systems; Update and Summary of Recent Progress

Hot Gas Conditioning: Recent Progress with Larger-Scale Biomass Gasification Systems; Update and Summary of Recent Progress

Thermal Gasification: A Feasible Solution for Sewage Sludge Valorisation?

Les procédés de gazéification comme alternative pour la valorisation de boues de stations d'épuration des eaux usées

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