Microwave-induced preparation of MgO-loaded N-rich porous biochar from marine biomass for efficient CO2 capture and mechanism exploration via theoretical calculation

Luo，Juan2; Chen，Yi1; Zhang，Xi3; Ma，Rui1; Huang，Huimin1; Sun，Shichang1; Lin，Junhao2; Yan，Feng4; Xu，Jiyun4

2023-06-15

10.1016/j.jclepro.2023.136915

Journal of Cleaner Production   Impact Factor & Quartile

0959-6526

For enhancing the prospects of solid adsorbents based on biochar for CO capture, a simple and green method (without modifying and pore-forming agents) for preparing MgO-loaded N-rich porous biochar (MgO/NBC) was constructed by microwave-induced marine biomass (Enteromorpha), then the CO adsorption mechanism was explored by theoretical calculations. The results showed that microwave heating promoted the development of graded porous structure, the formation of alkaline N-containing species, and the loading of MgO with smaller grains of MgO/NBC to exhibit better CO capture performance with a synergistic mechanism of physical and chemical adsorption. The maximum CO adsorption capacity of MgO/NBC was 4.79 mol kg, and the CO/N selectivity and CO/O selectivity were 79.83 and 11.14, respectively. After 15 cycles, the loss of adsorption capacity of MgO/NBC was 14.61%, which showed good cycling performance. DFT calculations showed that the heterogeneous structure between pyridine N and MgO enhanced the CO capture performance by enhancing the affinity and electron transfer between MgO/NBC and CO to reduce the adsorption energy. This work provided new insights for the construction of simple, green, low-cost, and high-efficiency CO solid adsorbents to help CO reduction.

Biomass CO2 capture MgO-Loaded N-Rich biochar Microwave heating Theoretical calculation

English

Others

2-s2.0-85151551887

Scopus

1.College of Chemistry and Environmental Engineering,Shenzhen University,Shenzhen,518060,China
2.School of Environment,Harbin Institute of Technology,Harbin,150090,China
3.Institute of Nanosurface Science and Engineering,Guangdong Provincial Key Laboratory of Micro/Nano,Shenzhen University,Shenzhen,518060,China
4.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Luo，Juan,Chen，Yi,Zhang，Xi,et al. Microwave-induced preparation of MgO-loaded N-rich porous biochar from marine biomass for efficient CO2 capture and mechanism exploration via theoretical calculation[J]. Journal of Cleaner Production,2023,405.

Luo，Juan.,Chen，Yi.,Zhang，Xi.,Ma，Rui.,Huang，Huimin.,...&Xu，Jiyun.(2023).Microwave-induced preparation of MgO-loaded N-rich porous biochar from marine biomass for efficient CO2 capture and mechanism exploration via theoretical calculation.Journal of Cleaner Production,405.

Luo，Juan,et al."Microwave-induced preparation of MgO-loaded N-rich porous biochar from marine biomass for efficient CO2 capture and mechanism exploration via theoretical calculation".Journal of Cleaner Production 405(2023).