Valorization of agroindustrial orange peel waste during the optimization of activated carbon–multiwalled carbon nanotubes–zinc oxide composites used in the removal of methylene blue in wastewater

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 492, P. 152102 - 152102

Published: May 10, 2024

Language: Английский

---

Energy and GHG emissions assessment for biochar-enhanced advanced biofuels value chains

Energy Conversion and Management, Journal Year: 2024, Volume and Issue: 309, P. 118450 - 118450

Published: April 21, 2024

Biochar has an enormous potential to store carbon in the long-term. Differently than BioEnergy Carbon Capture and Storage (BECCS) technologies, biochar incorporates biogenic a solid form that offers multiple benefits as sink, soil improver or for advanced materials production. The present study proposes innovative approach, where sequestration through is obtained integration of slow pyrolysis with fast decentralised biorefining systems, then converted producing drop-in fuels from oil hydrotreating gasification Fischer-Tropsch (FT) synthesis. scope either achieve negative GHG emissions assigned biofuels, export generated credit markets (i.e. outside biofuels intensity). concept entails process optimisation different stages biomass drying, conversion upgrading into way reduce fossil-based inputs, applying full value chain approach. Methodological choices assumptions on life cycle calculation are discussed, evaluating environmental performances by comparing new traditional chains. Using tailored lifecycle accounting methodology, this paper demonstrates high savings can be achieved. improved scenario shows how further reduces intensity up –4.2 gCO2e MJ−1 oil-based fuels, −20.2 FT-based fuels: demonstrated sustainable obtained. integrated biorefinery 100 MW capacity deliver additional 13.3 6.8 ktons CO2e per year, made hydrotreated FT synthesis, respectively.

Language: Английский

---

Halloysite Clay Nanotubes for Catalytic Conversion of Biomass: Synergy between Computational Modeling and Experimental Studies

ACS Catalysis, Journal Year: 2024, Volume and Issue: unknown, P. 18167 - 18203

Published: Nov. 24, 2024

Halloysite clay nanotubes (HNTs) are emerging nanomaterials for numerous environmental applications, including catalysis and biomass valorization. The efficacy of halloysite as a nanoplatform the catalytic conversion can be accurately evaluated by combined approaches based on experimental investigations computational modeling. Recently, many efforts have been made to properly describe most peculiar features focusing its structural interfacial through studies, which challenging natural nanoparticles yet crucial design novel catalysts exploited in conversion. Within this framework, review critically extensively discusses recent advancements related use different processes, such enzymatic reactions, precious- nonprecious-metal- alloy-catalyzed acid-activated mechanisms. research gap modeling chemical occurring surfaces is highlighted throughout review, together with latest achievements. To optimize efficiency halloysite-based materials valorization, future should focus implementation data calculations provided proper models synergistic approach.

Language: Английский

---

Char formation during pyrolysis of torrefied cellulose: Role of potassium catalysis and torrefaction pretreatment

Journal of Analytical and Applied Pyrolysis, Journal Year: 2024, Volume and Issue: 181, P. 106644 - 106644

Published: July 24, 2024

Language: Английский

---

A novel two stages chemical activation of pinewood waste for removing organic micropollutants from water and wastewater

Chemosphere, Journal Year: 2024, Volume and Issue: 363, P. 142974 - 142974

Published: July 29, 2024

Language: Английский

---

Non-wood-based biochars as promising and eco-friendly adsorbents for chromium hexavalent Cr (VI) removal from aquatic systems: state-of-the-art, limitations, and potential future directions

Environmental Pollutants and Bioavailability, Journal Year: 2024, Volume and Issue: 36(1)

Published: Aug. 14, 2024

Chromium exists from both natural geological processes and human actions, it has a substantial impact on health ecosystems. This study addresses the major challenges in using biochar as an environmentally friendly, sustainable, economical sorbent for removing chromium hexavalent throughout remediation process. The results exhibited that produced non-woody feedstocks pyrolyzed at (300°C −700°C) significantly large amount of various functional groups, higher pH (7 to 11.10) CEC (27 21.70 cmol kg−1), greater surface area (2–300 m2g−1), O/C H/C ratios with increasing carbonization temperature, adsorption capacities (1.63 435 mg g) superior performance removal compared biochars woody-biomass. use equilibrium isotherm, thermodynamic, kinetic models aids comprehending interactions between biochar, well their processes.

Language: Английский

---

Mechanism of pore formation in copper slag reduction: A clarification combining experiments and simulation

Carbon Resources Conversion, Journal Year: 2025, Volume and Issue: unknown, P. 100307 - 100307

Published: Feb. 1, 2025

Language: Английский

---

Activated Carbon Ammonization: Effects of the Chemical Composition of the Starting Material and the Treatment Temperature

C – Journal of Carbon Research, Journal Year: 2025, Volume and Issue: 11(1), P. 15 - 15

Published: Feb. 19, 2025

N-containing carbon-based materials have been employed with claimed improved performance as an adsorbent of acidic molecules, volatile organic compounds (VOC), and metallic ions; catalyst; electrocatalyst; supercapacitor. In this context, the present work provides valuable insights into preparation N-doped activated carbons (ACs) by thermal treatment in NH3 atmosphere (ammonization). A commercial AC was submitted to two kinds pretreatment: (i) reflux dilute HNO3; (ii) up 800 °C inert atmosphere. The original modified ACs were subjected ammonization different temperatures. N content ~8% achieved. Nevertheless, amount type inserted nitrogen depended on temperature surface composition starting material. Remarkably, oxygenated groups material favored insertion at low temperatures, formation mostly aliphatic (amines, imides, lactams), pyridinic, pyrrolic nitrogens. turn, high temperatures provoked decomposition labile functions. Therefore, prepared from sample pre-treated HNO3, which had highest among ammonization, presented after 400 but lowest °C.

Language: Английский

---

Production of Graphitic Carbon from Renewable Lignocellulosic Biomass Source

Minerals, Journal Year: 2025, Volume and Issue: 15(3), P. 262 - 262

Published: March 3, 2025

Carbon materials derived from lignocellulosic biomass (LCB) precursors have emerged as sustainable and versatile candidates, exhibiting outstanding properties for energy storage applications. This study presents an innovative cost-efficient approach to produce graphitic carbon LCB precursor (pinecone) using optimized hydrothermal treatment process followed by carbonization graphitization. The developed pinecone-derived (PDGC) was analyzed X-ray diffraction (XRD), transmission electron microscopy (TEM) scanning (SEM). XRD analysis confirmed the formation of a phase, indicated sharp intense (002) peak, decreased interplanar spacing (d002), increased crystallite size (Lc~20.4 nm), high degree graphitization (g~0.7), closely aligning with characteristics pure graphite. Additionally, TEM SEM micrographs revealed flake-like morphology well-defined, continuous, extended layers within PDGC structure. distinctive structural attributes material position it promising candidate batteries capacitors, while also serving model converting into advanced materials.

Language: Английский

---

Self-Sustained Physical Activation at Pilot-Scale Integrated in a Commercial Wood Gasification Plant: A Path to Renewable Activated Carbon, Pah Removal and Electrical Efficiency Improvement

Published: Jan. 1, 2025

Language: Английский

---