Waste oleaster seed-derived activated carbon mixed with coarse particles of fluid catalytic cracking as a highly-efficient CO2 adsorbent at low temperatures
Activated Carbon (AC) derived from low-priced biomass materials has been identified as the efficient and cost-effective candidate for low-temperature CO2 adsorption technique performed, though suffering from limited CO2 capture capacity and heterogeneous fluidization in fluidized-bed systems have remained the main challenges for the industrialization of carbonaceous sorbents. Herein, for the first time, the novel, low-cost, and highly fluidizable carbonaceous sorbent derived from waste-based oleaster seed (OS) has been developed through mixing with cost-effective coarse fluid catalytic cracking (FCC) particles. Hydrophobic SiO2 nanoparticles (NPs) which are well-known as highly efficient assistant materials for enhanced fluidization of hard-to-fluidize particles was also tested for the comparison. To determine the best activator and activator/precursor weight ratio, AC sorbent obtained from the pyrolysis of OS was prepared with two disparate activators of KOH and ZnCl2, and the activator/precursor weight ratios of 2, 3, 4, and the outcomes reveal the highest average CO2 capture capacity of 2.78 mmol/g over three successive cycles for KOH-activated sorbent with activator/precursor weight ratio of 2. This great OS-derived sorbent was mixed with different wt% of coarse FCC and SiO2 NPs to boost its fluidity; for which, the bed expansion reached from 1.6 to 3.5, at the gas velocity of 5 cm/s by mixing with 2.5 wt% FCC, similar to 2.5 wt% SiO2 NPs-assisted sample. In addition to homogeneous fluidizability, a superior multicyclic stability of 95.5% during 25 multiple adsorption/desorption cycles was also assessed. The highly cost-effective FCC-mixed OS-derived activated carbon with both enhanced fluidity and multicyclic CO2 capture activity is introduced as the low-temperature CO2 capture candidate.
| Main Authors: | , , , , |
|---|---|
| Other Authors: | |
| Format: | artículo biblioteca |
| Language: | English |
| Published: |
Elsevier
2023-08-23
|
| Subjects: | CO2 capture, Activated carbon, Oleaster seed, Fluidization, FCC particles, SiO2 nanoparticles, Ensure access to affordable, reliable, sustainable and modern energy for all, Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation, |
| Online Access: | http://hdl.handle.net/10261/338045 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|