Evaluation of integrated biorefinery technologies in power industry

Transcription

1 Case 5: Power sector Evaluation of integrated biorefinery technologies in power industry Herman den Uil (ECN, the Netherlands) Final BIOREF-INTEG Seminar 9 June 2010, Düsseldorf, Germany

2 Introduction 2 cases: Co-production of pyrolysis oil Reference : Combustion based power production Biorefinery : Use existing combustor in production of pyrolysis oil Co-production of chemicals Reference : Gasification based power production Biorefinery: Valorise high value products in syngas

3 Reference case: Combustion based power production Combustion air Electricity Biomass Electricity Main process - CHP 67 MW th Peat 17 MW e =25% Flue Gases Ash Heat Hot Water 40 MW th =60%

4 Integrated biorefinery case Combustion air Electricity Biomass 67 MWth Peat 22 MW th forestry residues Main process - CHP Flue Gases Dryer Ash Hot Sand Dried forest residues Electricity Pyrolyser Electricity 15.6 MW e = 18% Heat Hot Water 44.3 MW th = 50% 15.5 MW th = 17% Pyrolysis Oil Hot Water Heat Total 89 MWth Fuel Gas Pyrolyser sand & char Total efficiency 85%

5 Results techno-economic assessment Medium scale - Combustion: - Reference case: Investment 34 M Electricity production costs - Biorefinery case: 60 /MWh Additional investment 10 M Electricity production costs Pyrolysis oil at 90 /ton Pyrolysis oil at 220 /ton 88 /MWh 60 /MWh

6 Technical & commercial feasibility Technical feasibility below average 64.6 vs Pros - Cons No significant downstream processing required Immature technology Application of product not developed Commercial feasibility below average 65.8 vs Pros - Cons Renewable product and positive for the environment Introduction of new products required

7 SWOT analysis Strength Weaknesses Opportunities Threats Oil as intermediate product: storage, use of feedstock Unproven technology Varying quality of oil Increasing oil price Upgrading to 2 nd generation biofuel Pyrolysis oil might have unwanted properties Competition with other bio oil products

8 Reference cases Large scale -gasification Combined cycle Combined Biomass Gasification cycle Power 344 MW th Wood 157 MW e = 46%

9 Integrated biorefinery case Large scale + co-production chemicals & alcohols Biomass Gasification Solids removal BTX & tar removal CO 2 removal 344 MW th Wood 19 MW th BTX BTX Tars 23 MW th Tars Cryogenic Catalytic distillation synthesis CH4 Ethylene Mixed alcohols 44 MW th C 2 H 4 74 MW th Mixed alcohols Combined cycle Power 46 MW e Total efficiency 60%

10 Results techno-economic assessment Large scale - Gasification - Reference case: Investment 230 M Electricity production costs - Biorefinery case: 74 /MWh Additional investment 62 M Electricity production costs 48 /MWh Or revenues from chemicals are more than enough to cover all production costs

11 Technical & commercial feasibility Technical feasibility below average 53.4 vs Cons Immature technology Complex integrated process Commercial feasibility below average 68.4 vs Pros - Cons Renewable products and positive for the environment No existing product/market combination for tars No economical benefit for the users of the products

12 SWOT analysis Strength Weaknesses Opportunities Threats Existing markets for products High value coproducts Unproven technology Complex concept Increasing oil price Integration with existing chemical industry Competition with biochemical biorefineries Registration and safety issues for new chemical products

13 Summary and conclusions Energy efficiency: For pyrolysis route, same as for stand-alone CHP 85% For chemicals route increase from 45 to 60% Economics: For pyrolysis route electricity production costs /MWh Depends on value of the pyrolysis oil For chemicals route electricity production costs /MWh Revenues from chemicals cover all production costs Technical feasibility: Lower than project average, primarily due to immaturity required process steps Commercial feasibiltiy: Below project average due to (among other things) lack of existing markets

14 Thank you for your attention For more information please contact Herman den Uil Energy research Centre of the Netherlands