Formulation of activated carbons and evaluation of methane storage by compression and adsorption

Abstract

Activated carbons were produced from coconut shells by chemical activation using H3PO4 (CAQ1) and ZnCl2 (CAQ2), and used as adsorbents for natural gas storage. CAQ1 presented a wider pore size distribution than CAQ2. Storage evaluations were made in a semi‐pilot unit (0.5–4.0 MPa and 298–313 K). According to the used reactant, at 313 K and 3.0 MPa, the adsorptive capacities were 0.060 g/g (CAQ2) and 0.092 g/g (CAQ1). The shortest storage time to charge the tank to 4.0 MPa was obtained by CAQ2 (3.1 min), compared to CAQ1 (3.4 min), due to its higher specific heat capacity. © 2011 Canadian Society for Chemical Engineering

Effect of the Intra-Particle Diffusion and Porous Structure on Models for Adsorption and Storage of Methane onto Activated Carbons

“…The higher specific heat capacity indicates an increase in the resistance to the rise of temperature in the bed with lower Effect of intra-particle diffusion and porous structure on adsorption models 733 desorption rate. Because of this fact, the activated carbons CAQ1 and CAQ2 reach the equilibrium quickly than NUCHAR NG (equilibrium time about 1 hour) (Sales et al 2012). Rahman et al (2011) observed similar thermal effects during charge and discharge cycles for natural gas storage.…”

“…The activated carbons CAQ1 and CAQ2 produced presented similar textural characteristics and physical properties to commercial activated carbon NUCHAR NG. Pore-size diameters of activated carbons close to 20 Å are treated by ANG process (Biloé et al 2002;Sales et al 2012). The activated carbon CAQ2 presented higher adsorption rate and gas retention, and this fact can be related to its higher specific heat capacity compared with CAQ1 and NUCHAR NG.…”

DEVELOPMENT OF ACTIVATED CARBON FROM BAMBOO (Bambusa vulgaris) FOR PESTICIDE REMOVAL FROM AQUEOUS SOLUTIONS

“…The most known applications are water treatment (remedying bodies of water, effluent treatment and sanitary landfill and water filters lixiviate); air purification (toxic gases and combustion gases removal); food and drink industrialization (sweetener purification, edible oils, glycerin, wine, organic and inorganic acids); pharmaceutical production (color and compounds removal from some drugs); medicinal use (toxic products elimination; tablets, curatives, odor control filters and masks productions), use in automotive vehicles (adsorbing combustible emissions or inside odors from them). It also is useful on oil refineries as a support for catalysts, gas storage, dehumidification (mold elimination and food conservation); in mining; and in the electronic industry (AVELAR et al, 2010;SALES et al, 2012;BAUTISTA-TOLEDO et al, 2014;SAUCIER et al, 2015;TMR, 2016).…”