Suitability analysis of sustainable nanoporous adsorbents for higher biomethane adsorption and storage applications. (13th June 2022)

• Record Type: Journal Article
• Authors: Adlak, Komalkant; Chandra, Ram; Vijay, Virendra Kumar; Pant, Kamal Kishore
• Is Part Of: International journal of energy research. Volume 46:Number 11(2022)
• Page Start: 14779
• Page End: 14793
• Publication Date: 2022-06-13
• Subjects: activated carbons -- adsorption isotherm -- methane storage -- pore size distribution (PSD) -- sustainable adsorbents -- waste management; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Power resources -- Research -- Periodicals; 621.042
• DOI: 10.1002/er.8182
• Languages: English
• ISSNs: 0363-907X

Abstract

Summary: Compatible pore structure of activated carbons (AC) has important role in development of adsorbed natural gas (ANG) technology. ANG has attracted attention due to mild storage conditions which makes it more easy in operation. Porous materials have played a significant role for the storing the methane rich gas on the surface. Therefore, their synthesis with compatible structures has a vital role in technological development. Activation of biomass/biochar with KOH produces hierarchical porous networks as required. However, based on the nature of biomass yields different types of porosity. Therefore, to examine it further, we have selected 10 different biomasses, especially waste for AC production. These prepared carbons were then analyzed with different techniques such as Brunauer‐Emmett‐Teller, X‐ray diffraction, scanning electron microscope, and FT‐infrared. AC produced from coconut and pistachio shells that are hard in nature are found to produce pore structure in relevant width size range for methane adsorption. Whereas other softer biomass tended to have wider pore distribution relatively. The highest volumetric ratio of ~251 v/v (uptake) and ~217 v/v (delivery) has been recorded on coconut shell AC, whereas the highest gravimetric uptake of ~0.32 g/g at 6.5 MPa recorded on karanja shell AC. Furthermore, all the properties impacting the adsorption are discussed in the view of ANG technology. Highlights: Ten different waste biomass has been utilized to produce activated carbons. Methane adsorption studies are carried out to find the most competent material. Coconut shell‐based carbons have shown the best storage and release capacities amongst all. Hardness in the physical nature gives narrower pore size distribution, whereas softer biomass produces wider pore distribution. Softer biomass such as agro‐residues is to be avoided for the use of methane storage. Abstract : Schematic of methane adsorption mechanism on activated carbons.