Microreactor Approaches for Liquid Fuel Production from Bioderived Syngas −5 m3/h Prototype Development for HTHP Water Gas Shift

This work makes thermodynamic analysis and optimization for the coal-based Fischer-Tropsch (FT) process. The thermodynamic analysis results show that under standard conditions the maximum effective carbon conversion is 50% from raw coal (CH0.8O0.1) to hydrocarbon products, and at least 50% carbon is converted into CO2 emission in the coal-based FT process. Subsequently, a new coal-based FT synthesis process is proposed to get minimum water consumption, minimum wastewater emission and maximum energy efficiency. The process contains a pulverized coal gasification unit, water-gas-shift unit and iron-based FT synthesis unit with 50% CO2 selectivity. The H2/CO molar ratio of fresh syngas to the FT synthesis unit is 0.5. The carbon and water footprints analysis results indicate that the effective carbon conversion from raw coal to hydrocarbon products is about 46.0%, and it only consumes 0.102 molar water and generates 0.032 molar wastewater when converts 1 molar coal to hydrocarbon products in the process.

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Coupling Experiment of Compact Integrated Fuel Processors with 75kW PEM Fuel Cells

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.448-453.3066 ◽

2013 ◽

Vol 448-453 ◽

pp. 3066-3072

Author(s):

Li Ming Du

Keyword(s):

Fuel Cells ◽

Liquid Fuel ◽

Pem Fuel Cells ◽

Proton Exchange ◽

Water Gas Shift ◽

Two Stage ◽

Fuel Processor ◽

Water Gas ◽

Temperature Water ◽

Coupling Experiment

A compact autothermal reformer suitable for liquid fuel for instance methanol et al. was developed. The fuel reformer was combined with polymer electrolyte membrane fuel cells (PEM FC) and a system test of the process chain was successfully performed. The fuel processor consists of a fuel evaporating step, two-stage reformer and a two-stage reactor of water gas shift (WGS, one for high temperature water gas shift and the other for low temperature water gas shifter) and a four-stage preferential oxidation (PROX) reactor and some internal heat exchanger in order to achieve optimized heat integration. The fuel processor is designed to provide enough hydrogen for 75kWel fuel cells. After the initial step of methanol ATR, CO WGS and CO PROX steps are used for 'clean-up' CO. The exhaust gas from FC anode feedback to the fuel processor to vaporizes the feedstock of methanol and water by a catalytic combusting-evaporator. The hydrogen source system can produce hydrogen 70.5 m3/hr and its specific gravity power and specific volume power reach 255W/kg and 450W/L respectively. During three hours coupling experiment, the fuel processing system and the fuel cells all has been running smoothly. The volume concentration of H2 and CO in product gas (dry basis) was kept in 53% and 20ppm respectively, completely meeting the requirements of PEM fuel cells. The conversion efficiency of the hydrogen producing system based on LHV of fuel and hydrogen can exceed 95.85%. The fuel cells stacks put up strong resistance to CO and its maximum electronic load to the fuel cells reaches 75.5kW. It indicates that it is feasible technically for supplying hydrogen for Proton Exchange Membrane Fuel Cells by catalytic reforming of hydrogen-rich liquid fuel on-board or on-site.

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Reverse Water Gas Shift Reaction for Synthetic Fuel Production

Power and Energy Systems and Applications ◽

10.2316/p.2011.756-085 ◽

2011 ◽

Author(s):

Farhang Abdollahi ◽

Fatma Handan Tezel ◽

Stephen Aplin

Keyword(s):

Water Gas Shift ◽

Water Gas Shift Reaction ◽

Fuel Production ◽

Synthetic Fuel ◽

Reverse Water Gas Shift ◽

Shift Reaction ◽

Water Gas

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Polygeneration System for Power and Liquid Fuel With Sequential Connection and Partial Conversion Scheme

Volume 4: Cycle Innovations; Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Marine ◽

10.1115/gt2009-59927 ◽

2009 ◽

Cited By ~ 1

Author(s):

Hongguang Jin ◽

Lin Gao

Keyword(s):

Liquid Fuel ◽

Gas Production ◽

Chemical Energy ◽

Energy Utilization ◽

Water Gas Shift ◽

Superior Performance ◽

Chemical Production ◽

Polygeneration System ◽

Water Gas ◽

New System

As one important direction of clean coal technology with promising prospect, polygeneration system has an attractive performance both in coal liquefaction (or chemical production) and power generation. On the basis of the integration principle of chemical energy cascade utilization, a novel polygeneration system for power and liquid fuel (methanol) production, which innovatively integrates the fresh gas production subsystem without water-gas shift unit and the methanol synthesis subsystem adopting partial-recycle scheme, has been proposed in this paper. Taking another polygeneration system adopting the water-gas shift unit and Once Through Methanol (OTM) scheme as the reference, the new system has been investigated and assessed. The primary energy saving of new system is as high as 15%, which is significantly superior to 5∼8% in the reference system. With special attention on the interactions between the chemical production process and the thermal cycle, the integration features of the new system and the internal reason for its superior performance have been revealed, and the role of chemical energy utilization in system integration has been identified.

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