Orthogonal Experimental Study on Multifactor Conditions for Gas Desorption in Coal

Table 1

Proximate analysis of the coal samples.

Mad (%)	Aad (%)	Vdaf (%)	Cdaf (%)	St,d (%)	Qgr,ad (J/g)
0.98	15.95	18.12	64.95	2.58	30.32

Note: M_ad is the moisture content on a dry air basis (%); A_ad is the ash content on a dry air basis (%); V_daf is the volatile matter content on a dry-ash-free basis (%); C_daf is the fixed carbon content on a dry-ash-free (daf) basis (%); S_t,d is the total sulfur content (%); Q_gr,ad is the high calorific value of the sample (J/g).