CPL - Chalmers Publication Library

System aspects of biomass gasification with methanol synthesis - Process concepts and energy analysis

Författare och institution:
Kristina Maria Holmgren (Institutionen för energi och miljö, Värmeteknik och maskinlära); Thore Berntsson (Institutionen för energi och miljö, Värmeteknik och maskinlära); Eva Andersson (-); Tomas Rydberg (-)
Publicerad i:
Energy, 45 ( 1 ) s. 817-828
ISSN:
0360-5442
Publikationstyp:
Artikel, refereegranskad vetenskaplig
Publiceringsår:
2012
Språk:
engelska
Fulltextlänk:
Sammanfattning (abstract):
A systematic analysis of interrelations between different process steps in the biomass gasification and methanol synthesis chain was made. The energy performance of the system is assessed by reviewing previous studies and analysing a case study. Implications of technology choices and process integration opportunities are in focus. The case study analyses the impact on the energy balance of process-integrated drying compared to import of dried biomass, effects on electricity production due to heat pump integration or district heating (DH) delivery, effect on methanol yield of hydrogen addition and the impacts of adding an methanol-to-olefins (MTO) process. The biomass drying has significant impact on the overall energy balance, the cooling demand increases by 60% for the case study installation when process-integrated drying is not applied for drying the biomass. There is a trade-off between methanol yield, electricity and DH production potential of the system. Heat pumping can increase the electricity yield of the system. Hydrogen addition replacing the water gas shift can increase the methanol yield, in our case study by ∼35%, but in a stand-alone case the electricity demand makes such a system unrealistic. Adding an MTO unit to the system has limited impact on the energy balance.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
TEKNIK OCH TEKNOLOGIER ->
Kemiteknik ->
Annan kemiteknik
Nyckelord:
Biomass gasification, Methanol synthesis, Energy balance, Process integration
Chalmers styrkeområden:
Energi
Chalmers drivkrafter:
Hållbar utveckling
Postens nummer:
163254
Posten skapad:
2012-09-13 09:41
Posten ändrad:
2013-01-18 15:52

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