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首页> 美国卫生研究院文献>Membranes >Pilot–Scale Production of Carbon Hollow Fiber Membranes from Regenerated Cellulose Precursor-Part II: Carbonization Procedure
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Pilot–Scale Production of Carbon Hollow Fiber Membranes from Regenerated Cellulose Precursor-Part II: Carbonization Procedure

机译：从再生纤维素前体中试生产碳中空纤维膜-第二部分：碳化程序

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The simultaneous carbonization of thousands of fibers in a horizontal furnace may result in fused fibers if carbonization residuals (tars) are not removed fast enough. The optimized purge gas flow rate and a small degree angle in the furnace position may enhance the yield of high quality carbon fibers up to 97% by removing by-products. The production process for several thousand carbon fibers in a single batch is reported. The aim was developing a pilot-scale system to produce carbon membranes. Cellulose-acetate fibers were transformed into regenerated cellulose through a de-acetylation process and the fibers were carbonized in a horizontally oriented three-zone furnace. Quartz tubes and perforated stainless steel grids were used to carbonize up to 4000 (160 cm long) fibers in a single batch. The number of fused fibers could be significantly reduced by replacing the quartz tubes with perforated grids. It was further found that improved purge gas flow distribution in the furnace positioned at a 4-degree to 6-degree angle permitted residuals to flow downward into the tar collection chamber. In total, 390 spun-batches of fibers were carbonized. Each grid contained 2000–4000 individual fibers and these fibers comprised four to six spun-batches of vertically dried fibers. Gas permeation properties were investigated for the carbon fibers.
机译：如果碳化残留物（焦油）的去除速度不够快，则在卧式炉中同时碳化数千根纤维可能会导致熔融纤维。优化的吹扫气体流速和炉膛位置的小角度可通过去除副产物将优质碳纤维的收率提高多达97％。报告了单批生产数千种碳纤维的过程。目的是开发中试规模的系统来生产碳膜。乙酸纤维素纤维通过脱乙酰化过程转化为再生纤维素，并在水平定向的三区炉中将其碳化。石英管和带孔的不锈钢格栅用于单批碳化多达4000根（160厘米长）的纤维。通过将石英管替换为穿孔的网格，可以显着减少熔融纤维的数量。进一步发现，在以4度至6度角定位的炉子中改进的吹扫气体流分布允许残留物向下流入焦油收集室。总共有390根纺成纤维的纤维被碳化。每个网格包含2000-4000根单独的纤维，这些纤维由4至6根垂直干燥的纤维纺成批。研究了碳纤维的气体渗透性能。

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