MILENA-OLGA Integrated gasification and gas cleaning technology highly flexible and highly efficient. Jan-Willem Könemann Royal Dahlman

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1 MILENA-OLGA Integrated gasification and gas cleaning technology highly flexible and highly efficient Jan-Willem Könemann Royal Dahlman

2 MILENA-OLGA: most efficient gasification technology Finalist in the 5 to 20 MWe waste to energy technology contest by the British ETI Design for the Grimsby Renewable Power Facility, delivering 7.2 MWe from 150 tpd RDF, 31% net electric efficiency Most efficient energy from waste concept

3 MILENA-OLGA, IGCC MILENA Gasification OLGA Tar Removal AQUA H2O, HCl, NH3 Power Block Solar Taurus 60 IGCC The tar removal technology is key in the flexibility, efficiency and success of any advanced gasification technology

4 Tar removal: the most important step OLGA, an acronym for Oil - Gas, is a two loop oil scrubbing system 1. Removing heavy tars and dust in the 1 st loop as a liquid slurry 2. Removing light tars such as naphthalene and phenol in the 2 nd loop dissolved in air or steam Both tar streams are circulated back to the gasifier, making OLGA a tar waste free system 1. Condensor-w-ESP 2. Absorber / Stripper OLGA is ECN patented technology

5 Tar removal: the most important step Deactivation of catalyst Fouling of equipment Plugging an intercooler Naphthalene crystals OLGA is able to handle very high tar loads, up to 50 g/nm 3, which allows us to optimize MILENA gasification efficiency OLGA does not converts the tars, hence does also not convert valuable hydrocarbons such as methane, ethylene and BTX OLGA has low pressure drop and only consumes some electricity for pumps and tracing (~1% parasitic load on gross power production) OLGA captures tars with high efficiencies

6 OLGA Portugal Performance: 2010 tests on clean wood 2015 tests on waste (RDF) Parameter Raw Gas Air blown CFB Clean Gas Original OLGA oil Efficiency Key components (naphthalene, phenol) are removed with efficiencies > 99% Dust concentration and tar dew point is well within specifications of engines and turbines Waste gasification (plastic) results in more tar and more BTX The optimized OLGA oil leaves BTX in the product gas, which enhances overall efficiency Raw Gas Air blown CFB Clean Gas Optimized OLGA oil Efficiency Total tar (mg/nm3) 17, % 21,951 6, % Total tar excl. BTX (mg/nm3) 16, % 11, % Tar dewpoint ( C) > 350 < 15 > 350 < 20 Tar dewpoint ( F) > 660 < 59 < 660 < 68 Dust -- < < 10

7 OLGA in Portugal, live start-up

8 What is MILENA? An indirect gasifier that separates the combustion reactions and pyrolysis reactions in two different reactors, integrated in one refractory lined vessel Which makes it possible to optimize ash burn out, hence, reach 100% carbon to gas ratio and Prevents dilution by N 2 from combustion air and CO 2 and H 2 O from the combustion process MILENA is ECN patented technology

9 MILENA characteristics A higher cold gas efficiency (5 to 15% higher on LHV basis) 3 to 4 times more heating value than direct air blown gasifiers, 60% more than oxygen/steam blown gasifiers Needs cleaning, a dust filter is sufficient in most cases Carries 11% energy (heat) of which 9% is recuperated Ambient air, no ASU Resulting in carbon free ash, less waste, cleaner waste & safer waste

10 MILENA fuel flexibility Clean Wood Pomace Waste wood Waste (RDF)

11 MILENA needs OLGA to excel MILENA-OLGA-AQUA, ETI Grimsby base case RDF 25.7% moisture, 13.4 MJ/kg (5765 BTU/lb) MILENA-OLGA: 79% cold gas efficiency LHV tar free product gas vs. LHV fuel inlet, Tars captured by OLGA are recycled to MILENA 77% as product gas LHV to gas turbine 2%-point loss removing inorganic components 4 MWth steam bonus From MILENA to power island (17% of RDF energy)

12 MILENA-OLGA, IGCC ETI Grimsby base case RDF 25.7% moisture, 13.4 MJ/kg (5767 BTU/lb) 74% CHP efficiency Without using low grade heat 30 + % net electric efficiency

13 MILENA-OLGA power plant Small plant use engines, bigger plant use turbines 2 to 10 MWe engine / ORC combined cycle, 28-34% net electric efficiency 7 to 20 MWe gas turbine / steam turbine combined cycle, 30-35% net electric efficiency Future 20 to 50 MWe IGCC s net electric efficiencies of 35% or more But there is more than Power!

14 MILENA-OLGA, product gas energy MILENA-OLGA product gas contains more value than the ability to produce power alone MILENA-OLGA-AQUA design For the Grimsby Renewable Power Facility Typical distribution downstream 750 C (1382 F) RDF gasification, (RDF LHV being 100%)

15 MILENA-OLGA product gas contains more value than the ability to produce power alone Green gas, SNG, pipeline quality methane 70% efficiency from biomass or waste to SNG Liquid fuel production such as Fisher Tropsch Easy BTX co-production by an OLGA add-on, >95% Separation Efficiency Production of BTX-water mixture

16 Thank You! Jan-Willem Könemann Royal Dahlman Meet me at Poster MILENA in commissioning phase in Washim India