Separation of molten electrolyte from the graphene nanocarbon product subsequent to electrolytic CO_(2)capture  

作　　者：Gad Licht Kyle Hofstetter Stuart Licht 

机构地区：[1]C2CNT LLC,A4188 Triple Diamond Blvd,North Venice,FL,34275,USA [2]Carbon Corp,103526 St NE,Calgary,AB,T2A 6K8,Canada [3]Department of Chemistry,George Washington University,Washington,DC,20052,USA

出　　处：《DeCarbon》2024年第2期90-95,共6页低碳科学(英⽂)

摘　　要：The molten electrolysis of CO_(2)and its simultaneous transformation to graphene nanocarbons is a growing path to decarbonization of both anthropogenic CO_(2),and CO_(2)directly from the air.By tuning the electrolysis conditions a variety of pure graphene nanocarbons are produced from CO_(2).The carbon in CO_(2)is transformed at the cathode,growing as a carbanogel containing a matrix of the Graphene NanoCarbons(GNCs)and the molten electrolyte.This study demonstrates that one GNC product,carbon nanotubes from CO_(2),can be effectively separated from the carbanogel by removing the majority of the electrolyte for reuse in the electrolysis chamber.A molten electrolyte extraction efficiency of 98.5%from the carbanogel is achieved using filtration at high temperature and pressure.Optimization of the(1)press time,(2)filtration pressure applied to the carbanogel,and(3)filter type leads to a sequential increase in optimization.An increase of press time from 5 to 17min increases the electrolyte extraction from 53.8%to 92%at 540 psi,and to 97.8%at 3700 psi.An increase in electrolyte extraction of 98.5%from the carbanogel occurs with the inclusion of a Dutch-weave screen in the multilayer filter.The optimization is conducted on 10kg carbanogel samples,but instrumentation for up to 0.25-tonne carbanogel electrolyte separation is shown.

关 键 词：Carbon dioxide ELECTROLYSIS Carbon nanotubes Filter press Climate mitigation 

分 类 号：TG1[金属学及工艺—金属学]