Table 3.

Experiment and results of orthogonal design.

Number	TA A (°C)	tA B (min)	RI C	DAve (nm)	SBET (m2 g−1)	VTot (cm3 g−1)
1	700	90	3.0: 1	2.47	2577	1.04
2	700	120	3.5: 1	2.56	2422	1.32
3	700	150	4.0: 1	2.45	2862	1.62
4	700	180	4.5: 1	2.64	2509	1.24
5	750	90	3.5: 1	2.74	2458	1.45
6	750	120	3.0: 1	1.69	2550	1.45
7	750	150	4.5: 1	2.69	3321	2.16
8	750	180	4.0: 1	2.97	2735	2.34
9	800	90	4.0: 1	3.23	3228	2.91
10	800	120	4.5: 1	2.64	2901	1.77
11	800	150	3.0: 1	2.82	2321	1.51
12	800	180	3.5: 1	3.01	3155	2.37
13	850	90	4.5: 1	2.87	2674	2.25
14	850	120	4.0: 1	3.29	3362	3.08
15	850	150	3.5: 1	2.95	2528	2.18
16	850	180	3.0: 1	2.96	2227	1.64

Where D_Ave is the average diameter, S_BET is the specific surface area, V_Tot is the total pore volume.