HYDROGEN PRODUCTION in PLASMA ASSISTED GASIFICATION PROCESSES

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Barrie Atkinson
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1 Austrian Russian Science Day «Alternative and Renewable Energy Sources» October 15, 2007, Vienna HYDROGEN PRODUCTION in PLASMA ASSISTED GASIFICATION PROCESSES Dr. Sergey V.KOROBTSEV HYDROGEN ENERGY & PLASMA TECHNOLOGY INSTITUTE RRC Kurchatov institute Kurchatov sq., 1, Moscow, RUSSIA tel.: , fax:

2 PLASMA TECHNOLOGIES of HYDROGEN PRODUCTION The using of plasma processes allows improving traditional and creating an absolute new high efficiency technologies of industrial hydrogen production. Plasma processes are characterized by extremely high specific productivity (more than 100 times in comparison with catalytic processes), low metal capacity and absence of inertia, they are ecology friendly.

3 PLASMA TECHNOLOGIES of HYDROGEN PRODUCTION Plasma is the key to the development of new advanced technologies of producing hydrogen from different sources water, hydrogen sulfide, a variety of hydrocarbons (including natural gas) and even coal and solid municipal wastes.

4 ROSNAUKA project on energy production from municipal wastes WASTELESS PLASMA MELT CONVERSION of SOLID MUNICIPAL WASTES into SYN-GAS (HYDROGEN) JOINT PROJECT of MOSCOW STATE UNIVERSITY of ENGINEERING ECOLOGY and HYDROGEN ENERGY & PLASMA TECHNOLOGY INSTITUTE RRC Kurchatov institute Supported by Russian Ministry of Science and Education

5 waste-to-energy technology project goal: to vitrify and reduce the volume of neutral components and convert the energy content of the solid municipal wastes (or coal and other hydrocarbons containing matter) through incineration and cogeneration.

syn-gas (hydrogen) production from solid municipal wastes Technology is based on treatment of the solid wastes/coal in high temperature molten slag/metal bath and high temperature plasma jets with a

6 syn-gas (hydrogen) production from solid municipal wastes Technology is based on treatment of the solid wastes/coal in high temperature molten slag/metal bath and high temperature plasma jets with a supply of the coal/wastes and the oxygen-containing gases under gas/slag interface in an integrated "plasma-melt" device. The device for technology implementation contains a cooled common body of high temperature gasification reactor, a cooled channel for coal/wastes charging, electrodeless plasmatrons for water steam plasma jets generation, the near- or supersonic lances for oxygen- and/or steam-containing gas blowing off a molten slag/metal bath, the devices for release of syn-gas, molten metal and molten slag.

7 Plasma-melt technology of gasification of coal, solid and liquid hydrocarbons Simplified scheme of wasteless plasma melt conversion of solid municipal wastes into syn-gas (hydrogen)

8 Basic scheme of Melt-Assisted Partial Oxidation of Carbon containing in Wastes C x H y + x/2 O 2 х CO +у/2 H 2 coal, solid and liquid hydrocarbons, industrial and municipal wastes CaS CaO C x H y Slag Slag C x H y C + H 2 MeO + C CO + Me metal melt bath oxygen and water

9 MAIN STAGES of the GASIFICATION PROCESS Hydrocarbons pyrolysis and Н 2 production Hydrocarbons dissolution in a melt Chemical dissolution of О 2 in the melt Reduction of Me oxides by C and СО production

of Wastes (with carbon content) Process Chemical reactions of the

10 Basic Scheme of Melt-Assisted Partial Oxidation of carbon containing in Wastes FeO Cycle in Melt Assisted Partial Oxidation of Wastes (with carbon content) Process Chemical reactions of the process of Melt-Assisted Partial Oxidation of Wastes (with carbon content)

11 Result of optimization of Plasma-Melt Assisted Wastes Processing Parameters of Melt-Assisted Wastes Gasification Process (Power vs H 2 O/O 2 input): Wt gas turbine powerful; Wo2 power of oxygen production; Wr power input for gasification; Wc power of heat exchanger; Wok heat recuperation by oxidant; Wpl plasmatron power.

12 Specific features of waste-to-energy technology High specific processing rates, tunable and stable operation of proposed wastes-to-valuable products system are provided due to: integration of a molten slag/metal bath and plasma-chemical reactor as a single waste treatment unit; using at least one electrodeless plasmatron for generation of the chemically active, high temperature plasma jets, located above a gas/slag surface; forced feeding of the briquetted wastes (coal) directly into molten metal phase via cooled channel or injectors; tunable feeding of the oxygen- and/or water-containing gas jets via at least one lance, submerged below slag/metal interface.

13 MAIN TECHNOLOGY ADVANTAGES High specific production rate Possibility of pure Syn-gas production in ideal plug flow regime Binding of Sulfur and other harmful species No problem of solid sediments Treatment of any hydrocarbon wastes

14 Project on energy production from coal/solid wastes HYDROGEN PRODUCTION in PLASMA ASSISTED PROCESS of COAL STEAM REFORMING

HYDROGEN PRODUCTION in PLASMA ASSISTED PROCESS of COAL STEAM REFORMING EXPERIMENTAL SET-UP coal steam reforming assisted by pulse barrier discharge (DBD): С + Н 2 О Н 2 + СО coal syngas

15 HYDROGEN PRODUCTION in PLASMA ASSISTED PROCESS of COAL STEAM REFORMING EXPERIMENTAL SET-UP coal steam reforming assisted by pulse barrier discharge (DBD): С + Н 2 О Н 2 + СО coal syngas output Syn-gas energy cost vs. reactor temperature water vapor input high voltage Amount and composition of syn-gas produced depending on water vapor at the reactor input EXPERIMENTAL RESULTS

pulse dielectric barrier discharge (DBD) Effective realization of coal steam reforming process assisted by nonequilibrium plasma of pulse dielectric barrier discharge.

The possibility of the decrease of gasification process temperature about 100 о С at constant specific features (productivity) at the expense of plasma using.

16 pulse dielectric barrier discharge (DBD) Effective realization of coal steam reforming process assisted by nonequilibrium plasma of pulse dielectric barrier discharge. Hydrogen concentration in produced syn-gas was reached % when the energy expenditures on plasma generation was less than 0,5 kw*h/m3. The possibility of the decrease of gasification process temperature about 100 о С at constant specific features (productivity) at the expense of plasma using. The possibility to control process (composition of the products) at the expense of the change of discharge electric parameters and its geometry. luminescence of pulse streamer discharge in coal particles high temperature DBD reactor

17 thank you!

Production of synthesis gas from methane by high temperature

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