BioZEG anlegget - demonstrasjon av karbon negativ energiproduksjon

Transcription

1 BioZEG anlegget - demonstrasjon av karbon negativ energiproduksjon Bjørg Andresen 1), Jon Strand 1), Øystein Ulleberg 2), Julien Meyer 2), Nicola Di Giulio 1) 1) ZEG Power AS 2) Institutt for energiteknikk Presentasjon på CO 2 -konferansen Tekna, Trondheim januar 2015

2 Outline The ZEG-technology (ZEG ) The BioZEG concept Hynor Lillestrøm Test Center The BioZEG -plant The basic technologies and status test results Hydrogen production (SER) Power production (SOFC) Further work

3 The ZEG technology (ZEG ) High efficient co-production of electricity and hydrogen from hydrocarbon gases with integrated CO 2 - capture Electricity produced by high temperature solid oxide fuel cells (SOFC) Hydrogen production by sorption enhanced reforming (SER) using waste heat from the SOFC CO 2 removed by a high temperature CaO-based sorbent in a carbonation reaction Close thermal integration in order to get overall high efficiency (> 80%)

4 Strengths of ZEG for energy production Market and industrial opportunities High overall efficiency with integrated CO 2 capture no additional costs Flexibility All types of carbon based fuels can be used Product composition can be varied within design limits dependent on market demand of electricity and hydrogen (and heat) Applications and scale from small scale distributed plants based on biogas to industrial scale power plants based on natural gas Standalone/ grid connection

5 The BioZEG-concept Cost-effective stand alone green production of hydrogen and electricity Local, cheap resources (waste) Biogas, cleaned landfill gas Gasified biomass or organic waste FREVAR CO 2 capture included; positive climate contribution if sequestered, used locally or stored - otherwise climate neutral No other emissions Direct use Transportation; hydrogen FCEV, electrical battery powered Process industry Methanol Bio refinery, bio-oil upgrading Reducing agent Combined, integrated industrial solutions

6 Hynor Lillestrøm; Test Center for Hydrogen Technology from Research & Development to Demonstration & Innovation Demonstration of Systems and Technology Renewable Energy and Hydrogen Production Local Hydrogen Supply Hydrogen Compression Refuelling of Fuel Cell Vehicles Distributed Power with Fuel Cells Key technologies Sorption Enhanced Reforming CO 2 capture by solid sorbents Water Electrolysis Metal Hydrides Hydrogen Purification Solide Oxide Fuel Cells

7 Solar Power (local PV) Hynor Lillestrøm HRS, Technology Demonstration Mechanical Compressor Hydro Power (local grid) Water Electrolysis Electricity Biogas (landfill) CO 2 Waste Heat Reforming (SE-SMR) Waste Heat Metal Hydrides Hydrogen Storage Dispenser H 2 Primary Energy H 2 -production H 2 -compression H 2 -storage & Filling

8 BioZEG at Hynor Lillestrøm HRS Solar Power (local PV) Mechanical Compressor Hydro Power (local grid) Water Electrolysis Electricity CO 2 Waste Heat Reforming (SE-SMR) Waste Heat Hydrogen Storage Dispenser H 2 Biogas (landfill) Heat Exchange Metal Hydrides Solid Oxide Fuel Cell Electricity Primary Energy H 2 -production H 2 -compression H 2 -storage & Filling

9 The BioZEG-plant; 50kW demonstration of ZEG Cost-effective stand alone green production of hydrogen and electricity Objective: Demonstration of close thermal integration of SOFC (el) & reformersystem (H 2 - SER) Input: Biomethane Output: 70% total efficiency Hydrogen (30 kwh2, 1kg/h) Electricity (20 kwel) Separated CO 2 stream BioZEG 3D assembly

10 The Basic Technologies Hydrogen production Sorption Enhanced Reforming (Sorption Enhanced Steam Methane Reforming) Power production Solid Oxide Fuel Cells

11 Sorption Enhanced Steam Methane Reforming H 2 -production with integrated CO 2 -capture in one single step

12 DBFB, SER reactor prototype H 2 production capacity 12.5 Nm 3 /h Reformer 600 C; 0.5 barg max m/s; S/C ratio: 4 Upgraded desulfurized biogas Regenerator 850 C; 0.5 barg max m/s Steam + 2 vol% hydrogen Solids CO 2 sorbent: Dolomite 200µm Commercial reforming catalyst 150µm Ratio sorbent/catalyst: w/w Solids inventory: ca. 170 kg Solids circulation rate: 75 kg/h HT-HEX

13 Heat transfer (kw) Pressure drop (Pa) The regenerator HT heat exchanger Heat exchange calculations and CFD analysis Surface bed heat transfer Morelus et. al (1995) correlation considering combined gaseous and particle convection Radiative heat transfer taken into account Heat transfer Pressure drop Inlet gas velocity (m/s) HT-HEX

14 Initial tests run on the DBFB prototype (2014) SER batch test (H 2 production) High H 2 concentration (94 vol%) and high CO 2 capture rate Good temperature uniformity in the particle bed Some technical problems with steam flow measurements

15 Initial tests run on the DBFB prototype (2014) Regeneration batch test Regeneration temperature reached and maintained with the burner in operation only Enough heat supply to regenerate the sorbent Some initial instability when starting the burner

16 The Basic Technologies Hydrogen production Sorption Enhanced Reforming Power production Solid Oxide Fuel Cells

17 SOFC How they work 50 m

18 SOFC Module (20 kw el ) Stacks from PLANSEE / Fraunhofer IKTS 24 SOFC-stacks each made of 30 cell plates (130 x 150 mm), Metallic CFY (chromium-iron-yttrium) interconnects

19 BioZEG process flow

20 SOFC Test #3 ( des) Temperature & Power (kw)

21 SOFC Test #3 ( des) Power, current and voltage Startup Steady operation (24 stacks) Effekt Steady operation (22 stacks) Temperatur

22 Convertion of generated power to grid VDC / VDC VDC / 400 VAC

23 Convertion of generated power to grid VDC / VDC VDC / 400 VAC

24 Obtained operation experience Flexibility of process; supply of biogas, hydrogen, steam and air SOFC; Control and power output Power conversion Control systems; start up, close down, operation, data logs Technical infrastructure; ventilations, alarms SHE & emergency routines

25 Test and optimisation program, Establish operational knowledge Verification of startup and close down conditions Plant operational flexibility, stability and performance Variation in fuel composition and quality Different steady-state; system idling and peak load limits Industrial integration of the ZEG -technology Maximise system efficiency by optimised heat integration Integrated operation for coproduction of power and hydrogen Variation of SOFC operating temperature, afterburner heat boost, flow through heat exchangers Automation System modelling and optimisation Calibration of existing model with real operation data Long term SOFC module standalone operation

26 Main activities in ZEG-technology development Test and optimisation program of the 50kW BioZEG plant Upscaling from 50kW to 400kW BioZEG concept development Industrial applications and customers that require both hydrogen and electricity production Integrated systems where CCS is a key part of a larger processing plant

27 ZEG Power as Superior technology for high - efficiency energy production For more information: Bjørg Andresen, Managing Director bja@ife.no