Applicability study of linear fitting method of compressibility of high-pressure isothermal adsorption to coal

Gas compressibility is used to calculate the parameters under the same temperature and different pressure conditions in the experimental of high-pressure isothermal adsorption to coal,but relevant standards appendix gives only a portion of the associated compressibility coefficient,bring the test inconvenience for popularization and application.Based on the standard given in the compression coefficient value,carry out linear fitting method to contrast and analysis,and connecting with the custom of the isothermal adsorption test hollow tank volume measurement experiment research.The results show that the fitting compression coefficient calculation and the actual volume of empty cans volume relative error rate is only 0.032232%.The error in the normal range,indicating the use of compression coefficient linear fitting method is feasible.