The one-step synthesis of new tailored nanoporous carbons (NCs) from the common polypody (Polypodium vulgare) as feedstock for first time was presented. significance nitrogen flow (2.25 – 30 dm3/h) and temperature (500 900 °C) during carbonization investigated. KOH activated NCs have a high specific surface area (1994 m2/g), large total pore volume (0.998 cm3/g), micropore (0.923 cm3/g). displayed textural properties CO2 capture. showed superior adsorption at 1 bar equal to 5.67 9.05 mmol/g,...

This study aims to produce three kinds of activated biocarbon prepared from lignocellulosic biomass - olive pomace – by thermochemical treatment steam, K2CO3, and simultaneous steam K2CO3 at the temperature 600 °C. The characterization samples was carried out via several instrumental techniques such as TGA, XRD, FTIR, Raman, N2 sorption 77 K. values specific surface area, carbons, determined means adsorption measurements were between 5 m2/g. CO2 equal 2.63 mmol/g pressure 1 bar 0 °C...

In this work, we report the use of activated carbon synthesized from a sustainable material - fern leaves as sorbent for dioxide capture applications. The resource-friendly technology production was applied and described. carbons were prepared by chemical physical activation carbonization at same time temperature range 500–900 °C. This method reduces energy consumption resources. KOH CO2 used activating agents. evaluation adsorption ability supported different methods including: elemental...

Cost-effective activated carbons for CO2 adsorption were developed from molasses using H2SO4, H3PO4, HCl, NaOH, and KOH as activating agents. At the temperature of 0 °C a pressure 1 bar, equal to 5.18 mmol/g was achieved over carbon obtained by activation. The excellent M-KOH can be attributed its high microporosity. However, prepared HCl showed quite while having very low absence acid species on surface promotes M-HCl. pore size ranges that are important at different temperatures estimated....

The isomerization of α-pinene – a renewable bioresource was investigated as relatively simple method for the syntheses camphene and limonene, industrially important products. catalytic activity H2SO4-modified clinoptilolite evaluated without any solvent results show its applicability novel, green, reusable promising catalyst in organic syntheses. is cost-effective energy efficient because use low temperatures: at 30 °C after 1 h, conversion equal to 18%. In addition, this process has...

Promoted nanocrystalline iron was nitrided in a differential reactor equipped with systems that made it possible to conduct both thermogravimetric measurements and hydrogen concentration analyses the reacting gas mixture. The nitriding process, particularly catalytic ammonia decomposition reaction, investigated under an atmosphere of ammonia-hydrogen mixtures, atmospheric pressure. Ammonia concentrations, so potentials, were changed gradually from 0 100% at inlet reactor. temperature range...

Activated carbons with different textural characteristic were derived by the chemical activation of raw beet molasses solid KOH, while temperature was changed in range 650 °C to 800 °C. The adsorption CO2 on activated investigated. Langmuir, Freundlich, Sips, Toth, Unilan, Fritz-Schlunder, Radke-Prausnitz, Temkin-Pyzhev, Dubinin-Radushkevich, and Jovanovich equations selected fit experimental data adsorption. An error analysis (the sum squares errors, hybrid fractional function, average...

Ammonia is now regarded as an effective source of hydrogen containing no CO. In this paper, we have studied the nitriding nanocrystalline iron accompanied by catalytic ammonia decomposition reaction. The chemical processes were carried out in a tubular differential flow reactor at 475 °C. NH3/H2 gas mixtures different compositions viz. potentials let into reactor. At each potential stationary states observed, when mass solid and rate constant. whole range three regions phase composition...

The rising concentration of CO2 in the atmosphere is approaching critical levels, posing a significant threat to life on Earth. Porous carbons derived from biobased materials, particularly waste byproducts, offer viable solution for selective adsorption large-scale industrial sources, potentially mitigating atmospheric emissions. In this study, we developed highly porous lemon peel through two-step process, consisting temperature pretreatment (500 °C) followed by chemical activation KOH at...

This work presents studies on the preparation of porous carbon materials from waste biomass in form orange peels, coffee grounds, and sunflower seed husks. The activated carbons these three involved activation with KOH followed by carbonization at 800 °C an N2 atmosphere. way obtaining is very simple requires application only two reactants. Thus, this method cheap, it does not generate much chemical waste. obtained were characterized XRD, SEM, XPS, XRF methods. Moreover, textural properties,...

DT0-activated carbons modified with HCl and HNO3 acids, which were used for the first time in catalytic process of alpha-pinene isomerization, are presented this study. The carbon materials DT0, DT0_HCl, DT0_HNO3, DT0_HCl_HNO3 examined following methods: XRF, SEM, EDX, XPS, FT-IR, XRD, N2 adsorption at -196 °C. It was shown that DT0_HCl_HNO3-activated most active material isomerization process. Detailed studies carried out over by changing reaction parameters such as (5-180 min) temperature...

Abstract Iron catalyst for ammonia synthesis of various mean sizes iron nanocrystallites were nitrided with in a differential reactor equipped systems that made it possible to conduct both thermogravimetric measurements and hydrogen concentration analyses the reacting gas mixture. The nitriding process was investigated under atmospheric pressure at temperature 475°C. It found along an increase size nanocrystallites, decrease specific surface area samples, degree solid samples increased. At...

An innovative and cost-effective method for enhancing CO 2 capture by modifying the textural properties of derived activated biocarbons was explored. A molasses solution prepared with a sucrose concentration 1 mol/dm 3 . two-step synthesis process involved, which includes hydrothermal spherical carbonaceous materials from followed chemical activation. The material to activation agent ratio studied 4. adsorption all tested at 0, 10, 20°C pressure up bar. results showed significant correlation...

In this work, we present the catalytic application of naturally occurring zeolite, clinoptilolite, in oxidation α-pinene, a natural terpene compound. Clinoptilolites with different average particle sizes, designated as (in μm) clin_1 (20), clin_2 (50), clin_3 (200), and clin_4 (500–1000), were used green catalysts solvent-free α-pinene oxygen. Prior to their tests, characterized by following methods: nitrogen sorption at 77 K, EDXRF, XRD, SEM, UV-Vis, FTIR. The effects temperature, amount...

The work presents the results of studies on α-pinene oxidation over TS-1 catalysts with different Ti content (in wt%): TS-1_1 (9.92), TS-1_2 (5.42), TS-1_3 (3.39) and TS-1_4 (3.08). No solvent was used in studies, molecular oxygen as oxidizing agent. effect titanium catalyst, temperature, reaction time amount catalyst mixture conversion selectivities appropriate products investigated. It found that it is most advantageous to carry out process presence 5.42 wt% (TS-1_2), at temperature 85 °C,...

In this work, carbon-supported nickel catalysts with different Ni content (1, 2.5, 5, 10, and 20 wt%) were tested in the oxidation of alpha-pinene solvent-free reaction conditions. The process catalyst preparation consisted two stages. first stage, activated carbon from spent coffee grounds was obtained. second active phase form compounds applied using methods: (1) impregnation material salt solution, next reduction H2, (2) hydrothermal method autoclave reductor stabilizer. obtained...

The work presents the synthesis of FeCl3-modified carbonaceous catalysts obtained from waste orange peel and their application in oxidation alpha-pinene solvent-free reaction conditions. use as presented here (not described literature) is an effective cheap way managing this valuable renewable biomass. materials were by a two-stage method: first stage, activated carbon was obtained, second it modified FeCl3 presence H3PO4 (three different molar ratios these two compounds used studies)....

An industrial pre-reduced iron catalyst for ammonia synthesis was reduced at 773 K and heated in the hydrogen atmosphere temperatures range of – 973 K. Samples different mean sizes nanocrystallites depending on heating temperature were obtained (773 20 nm, 823 30 873 35 923 38 nm 40 nm). The crystallites determined by XRD method. chemical method applied to determine size distributions nanocrystallites, using results measuring rate nanocrystalline nitriding reaction with simultaneous...