| 1. |
- Claassen, Pieternel, et al.
(författare)
-
Non-thermal production of pure hydrogen from biomass: HYVOLUTION
- 2010
-
Ingår i: Journal of Cleaner Production. - : Elsevier BV. - 0959-6526. ; 18:Supplement 1, s. 4-8
-
Tidskriftsartikel (refereegranskat)abstract
- The objectives and methodology of the EU-funded research project HYVOLUTION devoted to hydrogen production from biomass are reviewed. The main scientific objective of this project is the development of a novel two-stage bioprocess employing thermophilic and phototrophic bacteria, for the cost-effective production of pure hydrogen from multiple biomass feedstocks in small-scale, cost-effective industries. Results are summarised of the work on pretreatment technologies for optimal biodegradation of energy crops and bio-residues, conditions for maximum efficiency in conversion of fermentable biomass to hydrogen and CO2, concepts of dedicated installations for optimal gas cleaning and gas quality protocols, as well as innovative system integration aimed at minimizing energy demand and maximizing product output. The main technological objective is the construction of prototype modules of the plant which, when assembled, form the basis of a blueprint for the whole chain for converting biomass to pure hydrogen. A brief outline is presented of the progress made towards developing reactors for thermophilic hydrogen production, reactors for photoheterotrophic hydrogen production and equipment for optimal gas cleaning procedures.
|
|
| 2. |
- Foglia, Domenico, et al.
(författare)
-
Effects of feedstocks on the process integration of biohydrogen production
- 2011
-
Ingår i: Clean Technologies and Environmental Policy. - : Springer Science and Business Media LLC. - 1618-954X .- 1618-9558. ; 13:4, s. 547-558
-
Tidskriftsartikel (refereegranskat)abstract
- Future production of hydrogen must be sustainable. To obtain it, renewable resources have to be employed for its production. Fermentation of biomasses could be a viable way. The process evaluated is a two-step fermentation to produce hydrogen from biomass. Process options with barley straws, PSP, and thick juice as feedstocks have been compared on the basis of process balances. Aspen Plus has been used to calculate mass and energy balances taking into account the integration of the process. Results show that the production of hydrogen as energy carrier is technically feasible with all the considered feedstocks and thanks to heat integration, second generation biomass (PSP and barley straws) are competitive with food crops (thick juice).
|
|
| 3. |
- Foglia, Domenico, et al.
(författare)
-
Integration studies on a two-stage fermentation process for the production of biohydrogen
- 2010
-
Ingår i: Journal of Cleaner Production. - : Elsevier BV. - 0959-6526. ; 18, s. 72-80
-
Tidskriftsartikel (refereegranskat)abstract
- Fermentation of biomass residues and second generation biomasses is potentially a way to enable a sustainable production of hydrogen. Simulation models which calculate mass and energy balances, developed with Aspen Plus (R), are used to integrate the process steps necessary to produce pure hydrogen from biomass in a 2-stage fermentation process. Process and heat integration are introduced to reduce the high water and heat demand of the process, connected to the low substrate concentrations in the involved process streams. The results show that the recirculation of process effluents, together with the use of properly designed heat exchangers, can reduce the water and heat demand up to 90% from a non-integrated process, but is also subject to restrictions due to an increase in osmolality in the system. (C) 2010 Elsevier Ltd. All rights reserved.
|
|
| 4. |
- Foglia, Domenico, et al.
(författare)
-
Integration study on a two-stage fermentation process for the production of biohydrogen
- 2009
-
Ingår i: Chemical Engineering Transactions. - 1974-9791. ; 18, s. 345-350
-
Konferensbidrag (refereegranskat)abstract
- In order to make the hydrogen economy fully sustainable, renewable resources have to be employed for its production. Simulation models, developed with Aspen Plus to calculate mass and energy balances, will be used to integrate the process steps necessary to produce pure hydrogen from biomass in a 2-stage fermentation process. The main challenge is the reduction of water and heat demand connected to the low substrate concentration in the fermentation steps; the easiest solution is to partly recirculate outgoing process streams. Electrolyte equilibrium was considered during simulation of different recirculation options to evaluate important effects on the pH and on the system osmolality. The results show that certain recirculation options can reduce the heat and water demand significantly.
|
|
| 5. |
- Markowski, Mariusz, et al.
(författare)
-
Estimation of energy demand of fermentation-based hydrogen production
- 2010
-
Ingår i: Journal of Cleaner Production. - : Elsevier BV. - 0959-6526. ; 18, s. 81-87
-
Tidskriftsartikel (refereegranskat)abstract
- The paper is concerned with estimation of heat and power consumption in a conceptual plant to produce hydrogen from sucrose-containing or starchy biomass by fermentation. A hydrogen plant connected with a sugar factory is regarded as the basic option; the sugar factory serves as a source of sucrose-containing thick juice for the hydrogen plant, where this feedstock is processed to hydrogen. As another option, a stand-alone hydrogen plant in which starch must initially be converted to fermentable glucose solution is considered. The values of key process parameters are assumed on the basis of preliminary experimental data. For both options of the hydrogen plant, heat consumption is estimated taking heat recovery in a heat exchanger network into account. Power consumption is estimated by calculating power needed for pumping of liquid and gaseous process media. (C) 2010 Elsevier Ltd. All rights reserved.
|
|
| 6. |
- Markowski, Mariusz, et al.
(författare)
-
Heat integration of a fermentation-based hydrogen plant connected with sugar factory
- 2009
-
Ingår i: Chemical Engineering Transactions. - 1974-9791. ; 18, s. 351-356
-
Tidskriftsartikel (refereegranskat)abstract
- The paper is concerned with heat integration of a conceptual hydrogen plant connected with a sugar factory. The sugar factory serves as a source of sucrose-containing thick juice for the hydrogen plant, where this feedstock is processed to hydrogen. Moreover, this connection gives an opportunity to utilize waste heat from the sugar factory. Hydrogen is produced by two-stage fermentation, that is, thermophilic fermentation followed by photofermentation. The gas mixture obtained in the two process stages is supplied to the gas separation system, composed of absorbing and stripping columns for circulating amine solution, to separate hydrogen from carbon dioxide. Using Pinch Technology and considering sugar factory with its CHP plant as an energy source, the hydrogen plant is heat-integrated to minimise the energy consumption.
|
|
