Catalytic pyrolysis of biomass with potassium compounds for Co-production of high-quality biofuels and porous carbons
| Autor: | Yafei Shen, Shu Zhang, Niyu Zhang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
020209 energy
Mechanical Engineering Sorption 02 engineering and technology Building and Construction Pollution Toluene Industrial and Manufacturing Engineering Catalysis chemistry.chemical_compound General Energy Adsorption 020401 chemical engineering Chemical engineering chemistry Biochar 0202 electrical engineering electronic engineering information engineering Char 0204 chemical engineering Electrical and Electronic Engineering Deoxygenation Pyrolysis Civil and Structural Engineering |
| Zdroj: | Energy. 190:116431 |
| ISSN: | 0360-5442 |
| DOI: | 10.1016/j.energy.2019.116431 |
| Popis: | This paper studied the catalytic pyrolysis of rice husk (RH) with different K-compounds (i.e., KOH, K2CO3, and K2C2O4) for co-production of biofuels and porous carbons. The decomposition of biomass occurred at lower temperature ranges due to the catalytic performance of K-compounds, following the order of KOH > K2CO3 > K2C2O4. By fast pyrolysis of RH with the K-compounds, the number of organic compounds was significantly reduced. More hydrocarbons (e.g., benzene, long-chain alkanes) were generated due to the in-situ catalytic upgrading (e.g., deoxygenation) of bio-oil. Pyrolysis of biomass with K-compounds could also accelerate the generation of unsaturated aliphatic hydrocarbons. In particular, pyrolysis of RH with K2C2O4 could result in the bio-oil with high-content of hydrocarbons and with low-content of oxygenated compounds (e.g., acids, phenols). Furthermore, the activated char with hierarchically micro-mesoporous structure was applied for toluene sorption. The pristine biochar had a relatively low adsorption time and capacity. By the chemical activation followed by the washing process, the specific surface area (SBET) of the RH-derived chars was significantly increased. The RHC-K2C2O4 had a maximum SBET of 1347 m2/g due to its mild activation process, which further contributed to a highest breakthrough time (1230 min) and capacity (609.38 mg/g) on toluene adsorption. |
| Databáze: | OpenAIRE |
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