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Evaluation of strategies for the subsequent use of CO_(2)

Frontiers of Chemical Science and Engineering 2010年第2期4卷 172-183页

作者： Marc SCHAEFER Frank BEHRENDT Thomas HAMMER Berlin Institute of Technology Institute for Energy Process Engineering and Conversion Technologies for Renewable EnergiesBerlin 10623Germany Siemens AG Corporate TechnologyCT PS 591052 ErlangenGermany

If substantial amounts of CO_(2),which according to actual scenarios may in the future be captured from industrial processes and power generation,shall be utilized effectively,scalable energy efficient technologies will be ***,a survey was performed to assess a large variety of applications utilizing CO_(2) chemically(e.g.,production of synthesis-gas,methanol synthesis),biologically(e.g.,CO_(2) as fertilizer in green houses,production of algae),or physically(enhancement of fossil fuel recovery,use as refrigerant).For each of the processes,material and energy balances were set *** with pure CO_(2) at standard conditions,expenditure for transport and further process specific treatment were *** on these calculations,the avoidance of greenhouse gas emissions by applying the discussed technologies was *** on the currently available technologies,applications for enhanced fossil fuel recovery turn out to be most attractive regarding the potential of utilizing large quantities of CO_(2)(total capacity>1000 Gt CO_(2))and producing significant amounts of marketable products on one hand and having good energy and material balances on the other hand(t_(CO_(2)-emitted)/t_(CO_(2)-utilized)fuels is worth considering,if carbon-free energy sources are used to provide the process energy and H2 being essential as a reactant in a lot of chemical processes(e.g.,production of DME:t_(CO_(2)-emitted)/t_(CO_(2)-utilized)>0.34).Biological processes such as CO_(2) fixation using microalgae look attractive as long as energy and CO_(2) balance are ***,the development of effective photobioreactors for growing algae with low requirements for footprint area is a challenge.

关键词： CO_(2) utilization survey energy balances synthesis-gas green houses micro-algae fossil fuel recovery

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