Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: waloryzacja biomasy

Sortuj według:

Ogranicz wyniki do:

Commoditization of wet and high ash biomass : wet torrefaction - a review

Mościcki K. J., Niedźwiecki Ł., Owczarek P., Wnukowski M.

Journal of Power Technologies

2017

Vol. 97, nr 4

354--369

Biomass is a non-intermittent energy source, which can play an important role in grid-based energy systems, since they need some non-intermittent sources in order to balance the variability of intermittent sources as wind and solar energy. Currently, this role is played mostly by fossil fuels, mainly because of the bulk size of a single source. Higher variability and lower energy concentration, among with some properties of biomass, are obstacles that prevent it from fully becoming a commodity. There are processes, such as dry torrefaction and hydrothermal carbonization (HTC) that could potentially help in terms of making biomass a tradable commodity, as is the case with fossil fuels. HTC, also known as wet torrefaction, might help solve problems that dry torrefaction is incapable of solving. These obstacles are, namely: high ash content, slagging and fouling properties of biomass (along with corrosion). Also the high moisture content of some types of biomass poses a problem, since they usually require substantial amounts of heat for drying. This paper reviews current knowledge about a process that could possibly transform problematic types of biomass into tradable commodities and compares it with other processes offering similar outcomes.

Perspektywy wytwarzania i wykorzystania węgla z biomasy

Bis Z.

Polityka Energetyczna

2005

T. 8, spec.

383-394

W artykule zarysowano perspektywy węgla jako przyszłościowego nośnika energii, stosowanego zarówno w tradycyjnych systemach przetwarzania energii, jak również w ogniwach paliwowych. Uzasadniono konieczność waloryzacji paliw odpadowych i biomasy dla podwyższenia sprawności konwersji energii w nich zawartej. Podano przykład technologii produkcji węgla z biomasy oraz perspektywy jego zastosowania.

Based on the perspectives to use coal as a fuel for heat and power production and taking into considerations the 'dirty issues' associated with conventional technologies of the production of power from coal, it has been shown that sustainable development strategy can be realized based on the energy conversion form biomass fuels. Results of the initial biomass and coal cocombustion tests, conducted in PC and FBC boilers have led to the conclusion that those actions are rather expensive, mainly due to cost of the biomass fuel and increase of the outlet loss, as well as the need to invest additional financial means for separate biomass feeding systems. High cost of the biomass energy requires biomass upgrading in order to minimize the outlet loss and unify the chemical and physical properties of the fuel. Those goals can be achieved with the use of the technology of autothermal fuel upgrading (AWP) described in this paper. The biocarbon produced with the AWP technology may be widely used, e.g. for zero-emission production of hydrogen, or as a fuel for combined cycles or direct carbon fuel cells (DCFC). The DCFC creates a real opportunity to convert the energy from biomass with high efficiency (roughly 70%) and zero-emission.