Turbomachinery in Biofuel Production Doctoral student : Martin Görling gorling@kth.se Supervisors: Prof Mats Westermark Prof Krister Sjöström

The main objectives of the project are :   To perform a techno-economic feasibility study of the integration of turbo-machinery into different promising bio-fuel production processes. To improve the technological knowledge in the field of turbo-machinery and bio-fuel production

SNG – Production Process

Turbomachinery in Biofuel Production Gas Turbines Steam Cycles

Gas Turbines Integration for syngas combustion Hybrid combined cycle Optimized for natural gas. Problems with syngas combustion in modern low NOx burners. Limited resources of biomass, scale problems. Integration for syngas combustion Input: Natural gas for gas turbine Biomass for fuel and heat (excess heat from fuel prod.) Output: Biofuel, Electricity, (Heat) Hybrid combined cycle

Hybrid Combined Cycle

Hybrid Plant Case Study Methanol Plant Biomass input (MWHHV) 384.2 Electricity consumption (MW) 27.4 Excess heat (MW) 83.7 Methanol produced (MWHHV) 248.4

Reference Case Hybrid Cycle

Steam Cycles Large amounts of excess heat Minimize steam consumption Indirect/hydrogen gasification Humidification Steam turbine power production is a given complement in biofuel production systems

SNG production Internal power prod. 5MW

Available steam: 33MW

Humidification – Minimizing steam pressure Producing vapor below boiling temperature Humid air Dry air (www.luleaenergi.se)

Humidification – Minimizing steam pressure Efficient use of latent (condensation) energy Possibility to lower steam data More efficient than standard HRSG units Increased power production

Future Work Finalizing the Humidification Study Final report – Licentiate Phase Suggestions for further studies