**Acknowledgements**

volume of 0.85 cm3 g−1 [82]. K-COP-M has been produced by KOH activation of COP-M

potential of K-COP-M-600/700 have been evaluated, indicating that these frameworks adsorb

signifies the utility of KOH in making effective adsorbents by creating ultra-small micropores in carbons. While heteroatom doping is significantly used in controlling the textural properties of porous carbon, carbonization of amine containing organic precursors substan-

selectivity. There are several reports available in this respect [49, 83], among which N-doped composite developed by Kim et al. is interesting, where polyindole-reduced graphene oxide (PIG) hybrid was synthesized and later carbonized at 400–800°C temperature and thus produces N-doped graphene sheets [84]. The N-doped graphene sheets are microporous having

at 1 atm and 273 K, which is higher than that of non-

adsorption

with very good

uptake capacities

capture and

adsorbents, which possess high BET

in the atmosphere, an increasing concern

. In the abovementioned sections, we have thus tried to

uptake of

uptake

/N2 ,

). This

polymer in an inert condition and at very high temperature (600–700°C). CO2

tially shows high N-doping and considers as an effective adsorbent of CO<sup>2</sup>

reduce environmental pollution since these N-doped carbon shows CO2

separation ability of 23 and 4 respectively.

POPs, nanoporous carbon and porous clays as CO2

rapid industrialization and abrupt emission of CO2

functional materials to adsorb CO2

0.6 nm pores with BET surface area of about 936 m2 g−1 and show a maximum CO2

3.0 mmol g−1 at 25°C and 1 atm pressure. Nevertheless, high recycling stability of CO2

is noticed even after 10 recycling cycles; additionally this N-doped carbon shows CO2

Alternatively, polyurethane foams (PUFs) are important thermosetting polymers and owing to its high nitrogen contents, it can be used as good precursor for N-doped carbon [85]. The global demand for polyurethanes was estimated to be 13.6 million tons in 2010, which leads to the generation of huge wastes. However, regeneration of spent polyurethane is not only high energy-consuming process, but also it produces toxic nitrogen oxides, carbon oxides etc. and causing severe environmental pollution. These wastes when carbonized at high temperature can produce nitrogen-doped carbon that can further

of 6.67 and 4.33 mmol g−1 at 0°C and 25°C under 1 bar, respectively. Finally, it can be said that like MOFs, POPs and porous clays, microporous carbon is also an alternative for CO2

In this chapter, we highlight important aspect of some promising materials, like MOFs,

surface area, tunable microporosity and facile surface engineering for enhancing interac-

metal oxides, activated carbon, porous silica, therefore, demonstrating the significance of new porous materials in developing carbon capture techniques. Considering the growth of

to the social as well as marine lives, would be diminished through utilization of aforesaid

summarize the recent advancement made in the synthesis and broad prospect of MOFs,

storage. Nevertheless, in the near future, such promising materials would motivate to the

POPs, nanoporous clays and porous carbon as potential adsorbents for CO2

. All such features are however exempted from conventional zeolites, alkali

activated carbon derived from COP-M (i.e. COP-M-600/700 stores 77–83 cm3 g−1 CO2

160–170 cm3 g−1 (7.6–7.1 mmol g−1) CO2

176 Carbon Dioxide Chemistry, Capture and Oil Recovery

CO2 /CH4

storage purposes.

**3. Conclusion**

tion with CO2

Authors would like to acknowledge Department of Science and Technology (DST), Government of India for funding (SR/NM/NS-18/2014 and SB/WEA-008/2016) and S. N. Bose National Centre for Basic Sciences, Kolkata, India.
