Table 2. Carbon Removal Kinetic Parameters of All Samples (n = 1).

T (°C)	sample	regression equation	correlation coefficient R2	activation energy E (kJ/mol)	pre-exponential factor A (min–1)	2RT/E
480–680	Ni-Ca-1	y = −5212.37x – 4.04	0.9917	43.34	917.25	0.1842
	Ni-Ca-2	y = −3997.94x – 5.93	0.9936	33.24	106.29	0.2401
	Ni-Ca-4	y = −3273.84x – 7.17	0.9933	27.22	25.19	0.2932
	Ni-Ca-6	y = −2776.21x – 7.79	0.9771	23.08	11.49	0.3457