CO2 capture is projected as one of the pragmatic approaches to deal with the global warming phenomenon. Adsorption-based CO2 capture is considered an economically attractive option to reduce CO2 emission. The success of the adsorption-based capture primarily relies on adsorbents and thus a variety of adsorbents have been investigated in the literature. We here report a high surface area (210.2 m 2 /g) exfoliated Ni-Al LDH nanoplatelet as a promising candidate for CO2 capture at an intermediate temperature of 200 degrees C applicable to integrated gasification combined cycle (IGCC) and sorption enhanced water gas shift (SEWGS) reactions. The materials were well characterized by PXRD, TGA, FTIR, TEM, ICP-OES, and N-2 adsorption surface area, and pore size distribution techniques. A unique nanoflower morphology comprising of exfoliated LDH platelets of ca. S layer thiclmess was obtained. The CO2 capture capacity (0.66 mmol/g) of the exfoliated Ni-Al LDH nanoplatelet is comparable to that of the widely reported Mg-Al LDH-derived mixed oxides and MgO-based adsorbents. Provided that Ni-Al and other transition metal LDH materials are known to exhibit superior catalytic properties for CO2 methanation, this work could pave the way for development of dual-functional materials for CO2 capture and conversion.
1.City Univ Hong Kong, Shenzhen Res Inst, Shenzhen Hitech Ind Pk, 8 Yuexing 1st Rd, Shenzhen, Peoples R China 2.City Univ Hong Kong, Sch Energy & Environm, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China 3.Univ Canterbury, Dept Chem & Proc Engn, Christchurch, New Zealand 4.Korea Univ, OJERI, Korea Biochar Res Ctr, Seoul 02841, South Korea 5.Korea Univ, Div Environm Sci & Ecol Engn, Seoul 02841, South Korea 6.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, Peoples R China 7.Australian Synchrotron ANSTO, 800 Blackburn Rd, Clayton, Vic 3168, Australia
Recommended Citation:
Hanif, Aamir,Sun, Mingzhe,Shang, Shanshan,et al. Exfoliated Ni-Al LDH 2D nanosheets for intermediate temperature CO2 capture[J]. JOURNAL OF HAZARDOUS MATERIALS,2019-01-01,374:365-371