The influence of biomass supply chains and by-products on the greenhouse gas emissions from gasification-based bio-SNG production systems
Artikel i vetenskaplig tidskrift, 2015

This study analyses the impact on the GHG (greenhouse gas) emissions of the raw material supply chain, the utilisation of excess heat and CO2 storage for a bio-SNG (biomass gasification-based synthetic natural gas) system by applying a consequential life cycle assessment approach. The impact of the biomass supply chain is analysed by assessing GHG emissions of locally produced woodchips and pellets with regional or transatlantic origin. Results show that the supply area for the gasification plant can be substantially increased with only modest increases in overall GHG emissions (3-5%) by using regionally produced pellets. The transatlantic pellet chains contribute to significantly higher GHG emissions. Utilising excess heat for power generation or steam delivery for industrial use contributes to lower emissions from the system, whereas delivery of district heating can contribute to either increased or decreased emissions. The production technology of the replaced heat and the carbon intensity of the reference power production were decisive for the benefits of the heat deliveries. Finally, the storage of CO2 separated from the syngas upgrading and from the flue gases of the gasifier can nearly double the GHG emission reduction potential of the bio-SNG system. (C) 2015 Elsevier Ltd. All rights reserved.

synthetic natural-gas

methanol

optimization

environmental-impact

Thermodynamics

lignocellulosic biomass

Biomass gasification

Energy & Fuels

System analysis

Process integration

pellets

life-cycle assessment

Synthetic natural gas

wood

Greenhouse gas emissions

bioenergy systems

Biomass supply chain

optimal locations

energy

Författare

Kristina Holmgren

Chalmers, Energi och miljö, Industriella energisystem och -tekniker

Thore Berntsson

Chalmers, Energi och miljö, Industriella energisystem och -tekniker

Eva Ingeborg Elisabeth Andersson

CIT Industriell Energi AB

T. Rydberg

IVL Svenska Miljöinstitutet AB

Energy

0360-5442 (ISSN)

Vol. 90 148-162

Ämneskategorier

Energiteknik

DOI

10.1016/j.energy.2015.03.098