Potential production of hydrocarbons from the conversion of a wood-derived oil over some aluminophosphate catalysts
- Univ. of Saskatchewan, Saskatoon (Canada)
A wood-derived oil (WDO) (obtained from ENSYN Technologies Inc.) was converted catalytically over three aluminophosphate catalysts, namely, SAPO-5, SAPO-11 and MgAPO-36. The oil was produced by the Rapid Thermal Processing (RTP) method and its elemental composition was 49.8 wt% C, 7.5 wt% H, and 42.7 wt% O. The catalysts were selected based on their molecular sieving property, acidity and pore size. The test runs were performed in a fixed bed micro-reactor which was operated at 3.6 WHSV and a temperature range of 330-410{degrees}C. The objective was to investigate the potential for the production of both liquid and gaseous hydrocarbon products from the conversion of WDO using aluminophosphate catalysts and to determine their performance in liquid product (OLP), aqueous fraction, coke, char and gas. The OLP and gas were the desired products. Between 12-22 wt% of WDO was obtained as OLP. SAPO-5 gave the highest yield of 22 wt% OLP, followed by 19.9 wt% by SAPO-11 and 16.3 wt% by MgAPO-36. The OLP contained an optimum of 61.5, 56.8 and 57.0 wt% (for SAPO-5, SAPO-11 and MgAPO-36, respectively) liquid hydrocarbons. The major products were benzene, n-hexane, heptane and isooctane. All three catalysts were selective for both aromatic and aliphatic hydrocarbons in comparable proportions. On the other hand, in comparison, HZSM-5 was highly selective for aromatic hydrocarbons whereas silica-alumina for selective for mostly aliphatic hydrocarbons. The gas yield was between 8-17 wt% of WDO. Its composition consisted mostly of C{sub 1}-C{sub 4} hydrocarbons and CO{sub 2}. Among the hydrocarbon gases, ethylene, propane, n-butane and some C{sub 4} olefins were the major products. The catalyst pore size and acidity influenced the yield and product distribution. Also, a detailed comparison with the results obtained with HZSM-5 and silica-alumina catalysts is presented.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- OSTI ID:
- 115331
- Report Number(s):
- NREL/CP-200-8098; CONF-9508104-; ON: DE95009230; TRN: 95:006736-0112
- Resource Relation:
- Conference: 2. meeting on biomass of the Americas, Portland, OR (United States), 21-24 Aug 1995; Other Information: PBD: [1995]; Related Information: Is Part Of Second biomass conference of the Americas: Energy, environment, agriculture, and industry. Proceedings; PB: 1741 p.
- Country of Publication:
- United States
- Language:
- English
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