Determination of Relationship between Higher Heating Value and Atomic Ratio of Hydrogen to Carbon in Spent Coffee Grounds by Hydrothermal Carbonization
This study was a preliminary investigation of solid recovered fuel production from spent coffee grounds using the hydrothermal carbonization (HTC) technique. The spent coffee grounds (SCGs) were subjected to HTC at 170 to 250 °C. The biochar was characterized by proximate analysis, ultimate analysis...
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| Veröffentlicht in: | Energies (Basel) 2021-10, Vol.14 (20), p.6551 |
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| creator | Park, Jung Lee, Gi Jeong, Cheol Kim, Ho Kim, Choong |
| description | This study was a preliminary investigation of solid recovered fuel production from spent coffee grounds using the hydrothermal carbonization (HTC) technique. The spent coffee grounds (SCGs) were subjected to HTC at 170 to 250 °C. The biochar was characterized by proximate analysis, ultimate analysis, capillary suction time, time to filter, suspended solids, and particle size distribution. The biochar yields decreased with increasing HTC temperature and time. However, the higher heating value (HHV) of biochar increased with the HTC temperature and time. The H/C slop relative to the O/C atomic rate of spent coffee grounds was 0.10 with low decarboxylation selectivity. Considering the HHV of biochar and dehydration capacity depend on ratio of H/C vs. O/C, the optimum reaction temperature of HTC was 200 °C, and the biochar from SCGs is an attractive biochar. |
| doi_str_mv | 10.3390/en14206551 |
| format | Article |
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The spent coffee grounds (SCGs) were subjected to HTC at 170 to 250 °C. The biochar was characterized by proximate analysis, ultimate analysis, capillary suction time, time to filter, suspended solids, and particle size distribution. The biochar yields decreased with increasing HTC temperature and time. However, the higher heating value (HHV) of biochar increased with the HTC temperature and time. The H/C slop relative to the O/C atomic rate of spent coffee grounds was 0.10 with low decarboxylation selectivity. 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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). 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The spent coffee grounds (SCGs) were subjected to HTC at 170 to 250 °C. The biochar was characterized by proximate analysis, ultimate analysis, capillary suction time, time to filter, suspended solids, and particle size distribution. The biochar yields decreased with increasing HTC temperature and time. However, the higher heating value (HHV) of biochar increased with the HTC temperature and time. The H/C slop relative to the O/C atomic rate of spent coffee grounds was 0.10 with low decarboxylation selectivity. Considering the HHV of biochar and dehydration capacity depend on ratio of H/C vs. O/C, the optimum reaction temperature of HTC was 200 °C, and the biochar from SCGs is an attractive biochar.</description><subject>Alternative energy sources</subject><subject>biochar</subject><subject>Biomass</subject><subject>Calorific value</subject><subject>Carbon</subject><subject>Carbonization</subject><subject>Charcoal</subject><subject>Coffee</subject><subject>Decarboxylation</subject><subject>Dehydration</subject><subject>energy density</subject><subject>Environmental impact</subject><subject>Fuel production</subject><subject>hydrothermal carbonization</subject><subject>Lignocellulose</subject><subject>Moisture content</subject><subject>Particle size</subject><subject>Particle size distribution</subject><subject>proximate analysis</subject><subject>reaction temperature</subject><subject>Selectivity</subject><subject>Size distribution</subject><subject>Solid suspensions</subject><subject>spent coffee grounds</subject><subject>Suction</subject><subject>Suspended solids</subject><issn>1996-1073</issn><issn>1996-1073</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>DOA</sourceid><recordid>eNpNkd1qGzEQhZfSQEOamzyBoHcFt9JKWlmXwU3iQCCQv1sx0o4cmbXkamWC-yJ53cp2SDI3M4zO-Y5gmuaM0V-ca_obIxMt7aRkX5pjpnU3YVTxr5_mb83pOC5pLc4Z5_y4ef2DBfMqRCghRZI8ucNhP4_PYU0slhfESOZh8YyZzLE-xQV5gmGDBGJPzktaBUfudpade77tc1pUR0lkBtlWZojkfo2xkFnyHpFc5bSJ_Ujs9qAulbyC4U0e_u3TvzdHHoYRT9_6SfN4efEwm09ubq-uZ-c3E8c7ViYMhVNcu74V0tOupUx79Ahs6qcMOiUtEw59L5yQAq3VHKymrdK9VNarjp801wdun2Bp1jmsIG9NgmD2i5QXBnIJbkAD1PNeKWpBemE9020NkRaAOqjMtrJ-HFjrnP5ucCxmmTY51u-bVk4F163isqp-HlQup3HM6N9TGTW7O5qPO_L_Wl2Ruw</recordid><startdate>20211001</startdate><enddate>20211001</enddate><creator>Park, Jung</creator><creator>Lee, Gi</creator><creator>Jeong, Cheol</creator><creator>Kim, Ho</creator><creator>Kim, Choong</creator><general>MDPI AG</general><scope>AAYXX</scope><scope>CITATION</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>DOA</scope><orcidid>https://orcid.org/0000-0001-7423-9928</orcidid><orcidid>https://orcid.org/0000-0002-3910-569X</orcidid></search><sort><creationdate>20211001</creationdate><title>Determination of Relationship between Higher Heating Value and Atomic Ratio of Hydrogen to Carbon in Spent Coffee Grounds by Hydrothermal Carbonization</title><author>Park, Jung ; 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| source | DOAJ Directory of Open Access Journals; MDPI - Multidisciplinary Digital Publishing Institute; EZB-FREE-00999 freely available EZB journals |
| subjects | Alternative energy sources biochar Biomass Calorific value Carbon Carbonization Charcoal Coffee Decarboxylation Dehydration energy density Environmental impact Fuel production hydrothermal carbonization Lignocellulose Moisture content Particle size Particle size distribution proximate analysis reaction temperature Selectivity Size distribution Solid suspensions spent coffee grounds Suction Suspended solids |
| title | Determination of Relationship between Higher Heating Value and Atomic Ratio of Hydrogen to Carbon in Spent Coffee Grounds by Hydrothermal Carbonization |
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