Autorzy

Burmistrz Piotr  Chmielniak Tomasz  Czepirski Leszek  Gazda-Grzywacz Magdalena  

Czasopismo

Journal of Cleaner Production

Rok   Tom Numer Strony

2016  139  15   858-865

Impact Factor

4.959

DOI

http://dx.doi.org/10.1016/j.jclepro.2016.08.112

Streszczenie w głównym języku publikacji

Słowa kluczowe

ślad węglowy  zgazowanie węgla  GE/Texaco  cykl życia (LCA)  sekwestracja CO₂  Shell

Tytuł w języku dodatkowym

Carbon footprint of the hydrogen production process utilizing subbituminous coal and lignite gasification

Streszczenie w języku dodatkowym

An analysis was carried out of the carbon footprint (CF) of technology for hydrogen production by subbituminous coal and lignite gasification. The analysis covered entrained flow gasification technology: GE Energy/Texaco and Shell. For calculations, the configuration of the synthesis gas generation system was adopted based on technological solutions available on a commercial scale. Gasification of subbituminous coal using Shell technology gives a yield of 5.1 kg H2 GJ^-1 of energy contained in coal. Using the GE/Texaco technology for gasification of subbituminous coal and Shell technology for lignite gasification, hydrogen yields were lower by 8 and 10%, respectively. The scope of the analysis included: mining, mechanical processing, and transport of coal to the gasification plant, as well as gasification and capture of CO₂ and its sequestration. The process of sequestration decreased the CF by 69% for the GE/Texaco technology and 78% for the Shell technology. The CFs of producing 1 kg H₂ with sequestration of carbon dioxide were as follows: 4.1 and 5.2 kg of CO₂ for subbituminous coal gasification using the technology by Shell and Texaco, and 7.1 kg of CO₂ for lignite gasification using Shell technology. The CF per 1 GJ of hydrogen produced in the gasification of subbituminous coal with sequestration of captured CO₂ amounted to 34.5 and 43.4 kg of CO₂ equivalent using the Shell and GE/Texaco technology. This was approximately 2.5 times lower than the CF of 1 GJ of coal. For 1 GJ of hydrogen produced from lignite gasified using Shell technology with sequestration of CO₂, the CF was 59.5 kg of CO₂, about 65% smaller than the CF of 1 GJ of energy in lignite. When the analyzed variations of hydrogen production did not include the sequestration of captured CO₂, the CF of 1 GJ of hydrogen was from 76 to 124% higher compared with the corresponding indicator for coal.

Słowa kluczowe w języku dodatkowym

carbon footprint  coal gasification  GE/Texaco  Life Cycle Assessment (LCA)  CO₂ sequestration   Shell