Pore Tailored and Surface Modified Functional Adsorbents
for Selective CO2 Capture
11,2,*MD. AMIRUL ISLAM , BIDYUT BARAN SAHA
1 International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
2 Department of Mechanical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan* Corresponding Author, e-mail: saha.baran.bidyut.213@m.kyushu-u.ac.jp, phone: +81-92-802-6722

1. Introduction
CO2 capture and storage (CCS) is one of
the greatest challenge. Adsorption-based
CCS systems are one of the most potential
future technologies to thrive as thesesystems are environmentally benign,noiseless, and non-corrosive in nature.
Additionally, adsorption-based CCS systems
require low-grade waste heat, which isavailable in the power and industrial sectors. Fig. Air adsorption in regular
The major drawback in the adsorption-based activated carbon pore (poorselectivity).
systems is the lack of high-grade adsorbent
that can selectively capture CO2. Therefore, the ultimate goal of this research
proposal is to synthesize a high-grade biomass derived activated carbon(BAC) for selective and enhanced CO2 capture.

4. Pore Engineering and Functionalization

Further enhancement of CO2 capture will be performed by incorporating CO2–
philic functional groups (e.g. –NH2) on the pore surface. This active surface
will hold the CO2 molecules more strongly.

5. Expected Result

2. Implementation Strategy

There are seven milestones to achieve the ultimate goal, which are as follows:(i) Identify and prepare high-grade biomass-derived ACs(ii) Pore shaping for efficient CO2 capture(iii) Surface treatment to enhance capture quantity(iv) Composite adsorbent(v) Characterization:(vi) GCMC, molecular dynamic (MD), and cycle simulations(vii) Ultrasonication based adsorption bed

3. Pore Modification

After the tailoring and incorporation of functional groups, the modifiedadsorbent will be consolidated using selective ionic liquid. The consolidation
will be helpful to achieve a compact system. Once the desired properties areachieved, the synthesized AC will be coated on a finned tube heat exchanger.
A closed chamber, namely an adsorption bed, will be built, including a lowpower consuming ultrasonication system for faster desorption of CO2. Several
adsorption beds will be accumulated to form a honeycomb type ultraefficientCCS.

6. Conclusions

Since the pores have poor CO2 selectivity, the pore shape will be engineered(narrowed and made comparable to CO2’s kinetic molecular size) by CVD ofhydrocarbon. The schematic of executing the process is shown in the figure.
The tailoring will also enhance some physical properties such as thermalconductivity, specific heat capacity and adsorption kinetics.

Former prime Minister of Japan, Mr. Suga, announced in parliament “Japanwill be carbon neutral by 2050”. Hence, industries are investing billions ofdollars in removing CO2 during production. For example, $20 billion dollar
was invested to build the Tomakomai CCS Demonstration Project inHokkaido which removed about 300,110 tonnes of CO2 from 2016–2019.
Toyota announced that they will reduce 90% CO2 emissions from their plants
and cars. They are investing millions of yens to achieve their target.
Sumitomo Chemical invested 490 million yen in designing a membranebased CO2 separation system.