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顺层钻孔抽采半径优化与研究 被引量:3
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作者 车燕兵 《中国煤炭》 2019年第5期64-66,共3页
针对经坊煤业煤层瓦斯赋存情况,为统筹考虑打钻成本,避免不必要的浪费,在保证工作面瓦斯抽采达标的情况下,用相对压力指标的测定方法测定了顺层瓦斯钻孔抽放半径。通过在煤层打一排测压孔并安设压力表,来记录原始压力,再进行抽放。观察... 针对经坊煤业煤层瓦斯赋存情况,为统筹考虑打钻成本,避免不必要的浪费,在保证工作面瓦斯抽采达标的情况下,用相对压力指标的测定方法测定了顺层瓦斯钻孔抽放半径。通过在煤层打一排测压孔并安设压力表,来记录原始压力,再进行抽放。观察各测压孔瓦斯变化情况,压力下降到稳定压力10%以上的钻孔为抽放影响范围内钻孔,将距抽放钻孔最远的一个抽放影响范围内钻孔到抽放钻孔的距离视为影响抽采半径。通过试验,经坊煤业3~#煤层?113 mm钻孔,抽放时间为180d时,有效抽采半径为2.0m,钻孔间距由3m变为4m。 展开更多
关键词 顺层钻孔 相对测压法 抽采半径优化 钻孔间距
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Solubility of red palm oil in supercritical carbon dioxide: Measurement and modelling 被引量:1
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作者 Wan Jun Lee Chin Ping Tan +1 位作者 Rabiha Sulaiman Gun Hean Chong 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2018年第5期964-969,共6页
The solubility of red palm oil (RPO) in supercritical carbon dioxide (scCO2) was determined using a dynamic method at 8.5-25 MPa and, 313.15-333.15 K and at a fixed scCO2 flow rate of 2.9 g. mn -1 using a full fac... The solubility of red palm oil (RPO) in supercritical carbon dioxide (scCO2) was determined using a dynamic method at 8.5-25 MPa and, 313.15-333.15 K and at a fixed scCO2 flow rate of 2.9 g. mn -1 using a full factorial design. The solubility was determined under low pressures and temperatures as a preliminary study for RPO par- ticle formation using scCO2. The solubility of RPO was 0.5-11.3 mg. (g CO2) -1 and was significantly affected by the pressure and temperature. RPO solubility increased with pressure and decreased with temperature. The Adachi-Lu model showed the best-fit for RPO solubility data with an average relative deviation of 14% with a high coefficient of determination, R2 of 0.9667, whereas the Peng-Robinson equation of state thermodynamic model recorded deviations of 17%-30%. 展开更多
关键词 SOLUBILITY Supercritical carbon dioxide Mathematical modelling THERMODYNAMICS Palm oil
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