Study on tar generated from downdraft gasification of oil palm fronds.
Study on tar generated from downdraft gasification of oil palm fronds.
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DOI：
10.1155/2014/497830
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发表时间：
2014
影响因子：
--
通讯作者：
Sulaiman SA
中科院分区：
文献类型：
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作者：
Atnaw SM;Kueh SC;Sulaiman SA
油棕叶 (OPF) 气化过程中最具挑战性的问题之一是焦油和颗粒物的存在，因为其挥发物含量较高。在本研究中，根据标准焦油取样协议定制的焦油取样装置用于量化 OPF 下吸式气化产生的合成气中焦油的重量浓度 (g/Nm3)。测量气化过程中产生的焦炭、灰分和固体焦油的量，以考虑质量和碳转化效率。使用元素分析机对焦油和固体焦油样品进行元素分析，同时使用液相气相色谱 (GC) 装置测定液体焦油中不同化合物的相对浓度。原始气体和净化气体样品的平均焦油浓度分别为 4.928 g/Nm3 和 1.923 g/Nm3。与其他生物质材料的结果相比，原始气体样品中的焦油浓度较高，这可能归因于 OPF 的挥发物百分比较高。本研究中提出的清洁系统的平均清洁效率为 61%，与文献中报道的砂床过滤器和文丘里洗涤器清洁系统的清洁效率相当。
One of the most challenging issues concerning the gasification of oil palm fronds (OPF) is the presence of tar and particulates formed during the process considering its high volatile matter content. In this study, a tar sampling train custom built based on standard tar sampling protocols was used to quantify the gravimetric concentration of tar (g/Nm3) in syngas produced from downdraft gasification of OPF. The amount of char, ash, and solid tar produced from the gasification process was measured in order to account for the mass and carbon conversion efficiency. Elemental analysis of the char and solid tar samples was done using ultimate analysis machine, while the relative concentration of the different compounds in the liquid tar was determined making use of a liquid gas chromatography (GC) unit. Average tar concentration of 4.928 g/Nm3 and 1.923 g/Nm3 was obtained for raw gas and cleaned gas samples, respectively. Tar concentration in the raw gas sample was found to be higher compared to results for other biomass materials, which could be attributed to the higher volatile matter percentage of OPF. Average cleaning efficiency of 61% which is comparable to that of sand bed filter and venturi scrubber cleaning systems reported in the literature was obtained for the cleaning system proposed in the current study.