Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 286-299 |
| Journal | Energy Science & Engineering |
| Volume | 3 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2015 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- commercial NiMo catalyst
- decarboxylation
- hydrogenation
- hydrotreating
- tall oil
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Hydrotreating reactions of tall oils over commercial NiMo catalyst. / Anthonykutty, Jinto M. (Corresponding Author); Linnekoski, Juha; Harlin, Ali; Lehtonen, Juha.
In: Energy Science & Engineering, Vol. 3, No. 4, 2015, p. 286-299.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Hydrotreating reactions of tall oils over commercial NiMo catalyst
AU - Anthonykutty, Jinto M.
AU - Linnekoski, Juha
AU - Harlin, Ali
AU - Lehtonen, Juha
N1 - SDA: SHP: Bioeconomy
PY - 2015
Y1 - 2015
N2 - Catalytic hydrotreating is an attractive method for upgrading bio-derived oils into renewable feedstocks with less oxygen content, suitable for producing valuable hydrocarbons through various petro-refinery processes. This study evaluates the catalytic activity of a commercial alumina (Al2O3) supported NiMo catalyst for hydrotreating tall oil feeds such as crude tall oil (CTO), distilled tall oil (DTO), and tall oil fatty acid (TOFA). Catalytic experiments carried out in a bench-scale fixed bed reactor set-up at different process conditions [space velocity (1-3 h-1), temperature (325-450°C), and H2 pressure (5 MPa)] produced a wide-range of products from tall oil feeds. Hydrotreating of TOFA produced highest yield of n-alkanes (>80 wt%) compared to DTO and CTO hydrotreating. A high conversion of fatty acids and resin acids was obtained in DTO hydrotreating. In CTO hydrotreating, a drop in conversion of fatty acids and resin acids was observed especially at the lowest temperature tested (325°C). The study revealed that there are various deoxygenation pathways preferential at different hydrotreating temperatures. As an example for TOFA, the decarboxylation route is dominant over the hydrodeoxygenation route at high temperatures (>400°C).
AB - Catalytic hydrotreating is an attractive method for upgrading bio-derived oils into renewable feedstocks with less oxygen content, suitable for producing valuable hydrocarbons through various petro-refinery processes. This study evaluates the catalytic activity of a commercial alumina (Al2O3) supported NiMo catalyst for hydrotreating tall oil feeds such as crude tall oil (CTO), distilled tall oil (DTO), and tall oil fatty acid (TOFA). Catalytic experiments carried out in a bench-scale fixed bed reactor set-up at different process conditions [space velocity (1-3 h-1), temperature (325-450°C), and H2 pressure (5 MPa)] produced a wide-range of products from tall oil feeds. Hydrotreating of TOFA produced highest yield of n-alkanes (>80 wt%) compared to DTO and CTO hydrotreating. A high conversion of fatty acids and resin acids was obtained in DTO hydrotreating. In CTO hydrotreating, a drop in conversion of fatty acids and resin acids was observed especially at the lowest temperature tested (325°C). The study revealed that there are various deoxygenation pathways preferential at different hydrotreating temperatures. As an example for TOFA, the decarboxylation route is dominant over the hydrodeoxygenation route at high temperatures (>400°C).
KW - commercial NiMo catalyst
KW - decarboxylation
KW - hydrogenation
KW - hydrotreating
KW - tall oil
U2 - 10.1002/ese3.70
DO - 10.1002/ese3.70
M3 - Article
VL - 3
SP - 286
EP - 299
JO - Energy Science & Engineering
JF - Energy Science & Engineering
SN - 2050-0505
IS - 4
ER -