Improving performance of direct coal liquefaction through swelling with solvent under the radiation of ultrasonic wave

• 来源期刊: 煤炭学报（英文版）
• 年，卷（期）: 2004,（2）
• 页码范围: 85-88
• 页数: 4页
• 语种: 英文

摘要

Three kinds of lower rank bituminous coals from Yanzhou mine and Tengxian mine from Shandong Province were treated and hydrogenated in the study. The test results show that the performance of hydrogenation liquefaction of the pretreated coals is improved markedly. Under the test condition of H2 initial pressure 8.2 MPa, addition of the oil yield of pretreated YZ1 coal is 69.76% compared with 62.53% of oil yield of untreated YZ1. Seminally the oil yield of pretreated YZ2 coal is 55.43% compared with20.88% of untreated YZ2 coal. The results of tests also prove that the improving degree of hydrogenation liquefaction of the pretreated coals is related with radiation duration when the radiation frequency and radiation power of ultrasonic wave are fixed.