Facile Preparation of Porous Carbon Derived from Industrial Biomass Waste as an Efficient CO₂ Adsorbent

Abstract

A porous carbon CO 2 adsorbent based on soybean cake (industrial biomass waste) has been successfully prepared by direct carbonation, following KOH activation. The prepared porous carbon adsorbent exhibits efficient CO 2 capture performance with the highest adsorption capacity of 4.19 and 6.61 mmol/g at 298 and 273 K under atmospheric pressure, respectively. Moreover, the porous carbon adsorbent also shows good static CO 2 adsorption capacity at a low pressure (0.15 bar) with an uptake of 1.26 mmol/g and an equally ideal dynamic CO 2 capture capability with an uptake of 1.28 mmol/g (15% CO 2 ) at 298 K. Additionally, the ideal adsorbed solution theory (IAST) model has been used to measure the selectivity of the porous carbon, and the IAST factors of CO 2 /N 2 (15/85, fuel gas), CO 2 /CH 4 (40/60, biogas), and CH 4 /N 2 (50/50, coalbed gas) are about 27, 6, and 6, respectively. The dynamic breakthrough test reveals the strong interaction between the porous carbon and CO 2 , which also verifies the considerable selective capture ability of this material for CO 2 . Furthermore, the soybean cake-based CO 2 adsorbent also presents prominent cyclic regeneration capacity (a five-time cyclic test) with lower isosteric heats (34−18 kJ/mmol) of CO 2 adsorption.

Modeling and Optimizing N/O-Enriched Bio-Derived Adsorbents for CO2 Capture: Machine Learning and DFT Calculation Approaches

“…The experimental data on nitrogen-doped AC or AC adsorbents including 217 data sets were collected from previous 30 publications and then were further utilized to design and test the ML technique, ,,,− ,− which was conducted by exploring different keywords (such as CO 2 capture and CO 2 adsorption combined with biochar, porous ACs, and N-doped ACs). SCOPUS, Web of Science, etc., were utilized as major databases to collect materials from the literature on CO 2 adsorption on ACs.…”

Simple fabrication of a phosphorus‐doped hierarchical porous carbon via soft‐template method for efficient CO2capture

“…For chemical activation, the most commonly used activators include ZnCl 2 , H 3 PO 4 , NaOH, H 2 SO 4 , KOH, and K 2 CO 3 . They can be used to make carbon materials with high surface areas and suitable porous structures 33–36 . The template method, one of the most widely used synthesis techniques for carbon materials, uses a template to effectively control the pore structure and prepare a material with an orderly structure and uniform pore size.…”

“…They can be used to make carbon materials with high surface areas and suitable porous structures. [33][34][35][36] The template method, one of the most widely used synthesis techniques for carbon materials, uses a template to effectively control the pore structure and prepare a material with an orderly structure and uniform pore size. There are hard and soft template methods.…”

Constructing Hierarchically Porous N-Doped Carbons Derived from Poly(ionic liquids) with the Multifunctional Fe-Based Template for CO2 Adsorption

“… 25 − 27 Alkaline amine-based solutions are currently utilized for CO 2 sorption by means of the chemical interaction between basic amino functional groups and acidic CO 2 molecules. 3 , 28 However, the shortages of this traditional method, such as equipment corrosion, chemical instability, and the high energy consumption of regeneration, worry the researchers. 29 , 30 In view of this, various adsorbents have been applied for CO 2 capture with high adsorption capacity.…”

“…CO 2 , as a predominant greenhouse gas and a renewable carbon resource, is supposed to be captured and stored effectively owing to global climate change and unreasonable usage of energy. − Alkaline amine-based solutions are currently utilized for CO 2 sorption by means of the chemical interaction between basic amino functional groups and acidic CO 2 molecules. , However, the shortages of this traditional method, such as equipment corrosion, chemical instability, and the high energy consumption of regeneration, worry the researchers. , In view of this, various adsorbents have been applied for CO 2 capture with high adsorption capacity. − Among them, NDPC is expected to be a promising CO 2 adsorbent because of its wide accessibility and a variety of advantages mentioned before. , As a result, developing a kind of porous carbons, which are suitable for CO 2 capture, is an attractive goal to be pursued.…”