Preparation and Characterization of Physicochemical Properties of Spruce Cone Biochars Activated by CO2
| Autor: | Katarzyna Jedynak, Barbara Charmas |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
02 engineering and technology physicochemical properties 010501 environmental sciences 01 natural sciences Article Adsorption spruce cone Desorption Biochar General Materials Science Point of zero charge Thermal analysis activated biochars 0105 earth and related environmental sciences Microscopy QC120-168.85 Chemistry QH201-278.5 Sorption Microporous material 021001 nanoscience & nanotechnology pyrolysis Engineering (General). Civil engineering (General) TK1-9971 Chemical engineering Descriptive and experimental mechanics ammonia adsorption Electrical engineering. Electronics. Nuclear engineering TA1-2040 0210 nano-technology Pyrolysis |
| Zdroj: | Materials, Vol 14, Iss 3859, p 3859 (2021) Materials Volume 14 Issue 14 |
| ISSN: | 1996-1944 |
| Popis: | In this study the pyrolysis of Norway spruce cones, a lignocellulosic biomass was made. The biochar product was obtained by means of the physical activation method. CO2 was used as the activating gas. The surface properties of biochars were characterized by the nitrogen adsorption/desorption isotherms, scanning electron microscopy (SEM/EDS), X-ray fluorescence energy dispersion spectroscopy (ED-XRF), thermal analysis (TGA/DTA), infrared spectroscopy (ATR FT-IR), Raman spectroscopy and the Boehm’s titration method as well as the point of zero charge (pHpzc). The adsorption capacity and the possibility of ammonia desorption (TPD) were also examined. It has been shown that spruce cones can be successfully used as a cheap precursor of well-developed surface biochars, characterized by a large pore volume and good sorption properties. All obtained activated biochars exhibit a largely microporous structure and an acidic character surface. The investigated activated materials have the specific surface areas from 112 to 1181 m2 g−1. The maximum NH3 adsorption capacity of the activated biochar was determined to be 5.18 mg g−1 (88.22 mmol g−1) at 0 °C. These results indicate the applicability of spruce cones as a cheap precursor for the sustainable production of the cost-effective and environmentally friendly biochar adsorbent. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|