A new aqueous mineral carbonation process utilizing bipolar membrane electrodialysis

Yoshinobu Abe, Hiroki Nagasawa, Atsushi Iizuka, Akihiro Yamasaki, Yukio Yanagisawa

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


A new aqueous mineral carbonation process which utilizes bipolar membrane electrodialysis was proposed. The proposed process consists of four unit operations, (a) acid leaching of alkaline metals (Ca2+ /Mg 2+) from mineral compounds by HNO3, (b) Na 2CO3 generation via absorption of CO2 into NaOH, (c) Ca and Mg carbonate precipitation by addition of Na2CO 3, and (d) HNO3/NaOH regeneration from NaNO3 solution with bipolar membrane electrodialysis. Regenerated HNO3 solution is then recycled to the acid leaching step. In the Na 2CO3 generation step, regenerated NaOH solution is contacted with the gaseous CO2 to form Na2CO3 solution. Exhaust gas from power plant can be directly used without compression. Experimental studies were conducted to confirm the technical feasibility of this process. Results demonstrate that HNO3 and NaOH were successfully regenerated from NaNO3 solution by using bipolar membrane electrodialysis. This result suggests that we can utilize alkaline metals in mineral compounds by using acid and HNO3 and NaOH solution can be used cyclically in this process.

Original languageEnglish
Title of host publication10AIChE - 2010 AIChE Annual Meeting, Conference Proceedings
Publication statusPublished - 2010
Event2010 AIChE Annual Meeting, 10AIChE - Salt Lake City, UT, United States
Duration: 2010 Nov 72010 Nov 12

Publication series

NameAIChE Annual Meeting, Conference Proceedings


Conference2010 AIChE Annual Meeting, 10AIChE
Country/TerritoryUnited States
CitySalt Lake City, UT


  • Bipolar membrane
  • Carbon dioxide
  • Electrodialysis
  • Mineral carbonation


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