| 1. |
- Möllersten, Kenneth, 1966-, et al.
(författare)
-
Potential market niches for biomass energy with CO2 capture and storage : Opportunities for energy supply with negative CO2 emissions
- 2003
-
Ingår i: Biomass and Bioenergy. - : Elsevier BV. - 0961-9534 .- 1873-2909. ; 25:3, s. 273-285
-
Tidskriftsartikel (refereegranskat)abstract
- The paper presents an analysis of biomass energy with CO2 capture and storage (BECS) in industrial applications. Sugar cane-based ethanol mills and chemical pulp mills are identified as market niches with promising prospects for BEGS. Calculations of CO2 balances of BECS in these applications show that the introduction of CO2 capture and storage in biomass energy systems can significantly increase the systems' CO2 abatement potentials. CO2 emissions of the total systems are negative. The CO2 reduction potentials of these technologies are discussed in regional and global contexts. An economic assessment of each system is carried out and opportunities for cost-effective technologies for CO2 capture, transportation and storage are identified. Furthermore, potentials for system improvements that could substantially decrease the CO2 abatement cost are addressed.
|
|
| 2. |
- Wahlund, B., et al.
(författare)
-
A total energy system of fuel upgrading by drying biomass feedstock for cogeneration : a case study of Skelleftea bioenergy combine
- 2002
-
Ingår i: Biomass and Bioenergy. - 0961-9534 .- 1873-2909. ; 23:4, s. 271-281
-
Tidskriftsartikel (refereegranskat)abstract
- Emissions of greenhouse gases, such as CO2, need to be greatly reduced to avoid the risk of harmful climate changes, One way to mitigate emissions is switching fuels, from fossil fuels to renewable energy, e.g., biomass. In this paper we investigate a new approach for improving the performance of biomass-based cogeneration plants, a bioenergy combine. The system is a conventional biomass-based combined heat and power (CHP) plant with integrated pellet production, where part of the CHP plant's heat is used for drying biomass feedstock for producing pellets, This unique integration enables increased annual operational hours and an increased use of biomass because the upgraded pellets as an energy carrier can be economically and technically transported from regions with a surplus biofuel to regions with demand for biofuel. In the studied case of this paper, the produced pellets are transported to another CHP plant for substituting fossil fuels. The total energy system of the bioenergy combine and the linked CHP plant is analysed from a perspective Of CO2 reduction and energy efficiency. The results show that the system has great potential for reducing CO2 and increasing the efficiency. Furthermore, the non-technical factors influencing the realisation of the project has also been studied through interviews, showing that the main criterion behind the investment was the potential for profitability. In addition, an important factor that facilitated the realisation was the co-operative environment between the municipality and Skeileftei Kraft. Environmental issues appeared not to be influencing direct, but indirect through government subsidies.
|
|
| 3. |
- Wahlund, Bertil, et al.
(författare)
-
Increasing biomass utilisation in energy systems : A comparative study of CO2 reduction and cost for different bioenergy processing options
- 2004
-
Ingår i: Biomass and Bioenergy. - : Elsevier BV. - 0961-9534 .- 1873-2909. ; 26:6, s. 531-544
-
Tidskriftsartikel (refereegranskat)abstract
- Emissions of greenhouse gases, such as CO2, need to be greatly reduced to avoid the risk of a harmful climate change. One powerful way to mitigate emissions is to switch fuels from fossil fuels to renewable energy, such as biomass. In this paper, we systematically investigate several bioenergy processing options, quantify the reduction rate and calculate the specific cost of reduction. This paper addresses the issue of which option Sweden should concentrate on to achieve the largest CO2 reduction at the lowest cost. The results show that the largest and most long-term sustainable CO2 reduction would be achieved by refining the woody biomass to fuel pellets for coal substitution, which have been done in Sweden. Refining to motor fuels, such as methanol, DME and ethanol, gives only half of the reduction and furthermore at a higher specific cost. Biomass refining into pellets enables transportation over long distances and seasonal storage, which is crucial for further utilisation of the woody biomass potential.
|
|
