Effects of potassium on hydrothermal carbonization of sorghum bagasse
Abstract Hydrothermal carbonization (HTC) reacts with biomass in water at a high temperature and pressure to produce hydrochar with a higher heating value (HHV) and lower ash content than dry torrefaction. The high potassium content in biomass can promote thermochemical conversion; however, it lower...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-04-01
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| Series: | Bioresources and Bioprocessing |
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| Online Access: | https://doi.org/10.1186/s40643-023-00645-4 |
| _version_ | 1797850264246419456 |
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| author | Shuhei Yoshimoto Numan Luthfi Kanta Nakano Takashi Fukushima Kenji Takisawa |
| author_facet | Shuhei Yoshimoto Numan Luthfi Kanta Nakano Takashi Fukushima Kenji Takisawa |
| author_sort | Shuhei Yoshimoto |
| collection | DOAJ |
| description | Abstract Hydrothermal carbonization (HTC) reacts with biomass in water at a high temperature and pressure to produce hydrochar with a higher heating value (HHV) and lower ash content than dry torrefaction. The high potassium content in biomass can promote thermochemical conversion; however, it lowers the melting temperature of the ash, causing slugging and fouling. Therefore, this study, investigated the effect of potassium on the HTC of sorghum bagasse by comparing the removal of potassium by washing with the addition of K2CO3. Consequently, the ash content was the highest in the potassium-added hydrochar and was 3.81% at a reaction time of 2 h. Elemental analysis showed that the lower the potassium content, the higher the carbon content, and the hydrochar with potassium removed by water washing at a reaction time of 3 h had the highest carbon content at 68.3%. Fourier transform infrared spectrometer showed dehydration and decarboxylation reactions due to HTC, but no significant differences were observed between the potassium concentrations. The mass yield decreased with increasing potassium content, and was 27.2% for the potassium-added hydrochar after 3 h. This trend was more pronounced with increasing reaction temperature. On the other hand, HHV was not affected by the potassium content. Therefore, the energy yield was similar to the weight yield. Thermal gravimetry and derivative thermal gravimetry (TG-DTG) analysis showed that higher potassium tended to accelerate the decomposition of lignin and decrease the oxidation temperature. Graphical Abstract |
| first_indexed | 2024-04-09T18:57:34Z |
| format | Article |
| id | doaj.art-dc5f3f9c539b4154bb321376f8cee8b2 |
| institution | Directory Open Access Journal |
| issn | 2197-4365 |
| language | English |
| last_indexed | 2024-04-09T18:57:34Z |
| publishDate | 2023-04-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Bioresources and Bioprocessing |
| spelling | doaj.art-dc5f3f9c539b4154bb321376f8cee8b22023-04-09T11:06:50ZengSpringerOpenBioresources and Bioprocessing2197-43652023-04-011011810.1186/s40643-023-00645-4Effects of potassium on hydrothermal carbonization of sorghum bagasseShuhei Yoshimoto0Numan Luthfi1Kanta Nakano2Takashi Fukushima3Kenji Takisawa4Graduate School of Bioresources, Mie UniversityGraduate School of Bioresources, Mie UniversityGraduate School of Bioresources, Mie UniversityGraduate School of Bioresources, Mie UniversityGraduate School of Bioresources, Mie UniversityAbstract Hydrothermal carbonization (HTC) reacts with biomass in water at a high temperature and pressure to produce hydrochar with a higher heating value (HHV) and lower ash content than dry torrefaction. The high potassium content in biomass can promote thermochemical conversion; however, it lowers the melting temperature of the ash, causing slugging and fouling. Therefore, this study, investigated the effect of potassium on the HTC of sorghum bagasse by comparing the removal of potassium by washing with the addition of K2CO3. Consequently, the ash content was the highest in the potassium-added hydrochar and was 3.81% at a reaction time of 2 h. Elemental analysis showed that the lower the potassium content, the higher the carbon content, and the hydrochar with potassium removed by water washing at a reaction time of 3 h had the highest carbon content at 68.3%. Fourier transform infrared spectrometer showed dehydration and decarboxylation reactions due to HTC, but no significant differences were observed between the potassium concentrations. The mass yield decreased with increasing potassium content, and was 27.2% for the potassium-added hydrochar after 3 h. This trend was more pronounced with increasing reaction temperature. On the other hand, HHV was not affected by the potassium content. Therefore, the energy yield was similar to the weight yield. Thermal gravimetry and derivative thermal gravimetry (TG-DTG) analysis showed that higher potassium tended to accelerate the decomposition of lignin and decrease the oxidation temperature. Graphical Abstracthttps://doi.org/10.1186/s40643-023-00645-4Hydrothermal carbonizationPotassiumSorghum bagasse |
| spellingShingle | Shuhei Yoshimoto Numan Luthfi Kanta Nakano Takashi Fukushima Kenji Takisawa Effects of potassium on hydrothermal carbonization of sorghum bagasse Bioresources and Bioprocessing Hydrothermal carbonization Potassium Sorghum bagasse |
| title | Effects of potassium on hydrothermal carbonization of sorghum bagasse |
| title_full | Effects of potassium on hydrothermal carbonization of sorghum bagasse |
| title_fullStr | Effects of potassium on hydrothermal carbonization of sorghum bagasse |
| title_full_unstemmed | Effects of potassium on hydrothermal carbonization of sorghum bagasse |
| title_short | Effects of potassium on hydrothermal carbonization of sorghum bagasse |
| title_sort | effects of potassium on hydrothermal carbonization of sorghum bagasse |
| topic | Hydrothermal carbonization Potassium Sorghum bagasse |
| url | https://doi.org/10.1186/s40643-023-00645-4 |
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