Study on Autogenous Heat Technology of Offshore Oilfield: Experiment Research, Process Design, and Application

Table 4

The effect of catalyst concentration on heat generation rate of system.

Catalyst concentration: 0.5% HCl		Catalyst concentration: 1.0% HCl		Catalyst concentration: 1.5% HCl
Time (min)	Temperature (°C)	Time (min)	Temperature (°C)	Time (min)	Temperature (°C)
0	25 (indoor temperature)	0	25 (indoor temperature)	0	25 (indoor temperature)
5	28	5	29	5	34
10	31	10	32	10	41
15	33	15	34	15	45
20	37	20	40	20	50
25	40	25	42	25	52
30	43	30	46	30	52
35	45	35	48	35	51
40	46	40	52	40	50
45	47	45	52	45	49
50	48	50	50	50	49
55	51	55	49	55	48
60	50	60	49	60	47

Concentration of system: 100 mL 2.0 mol/L NaNO₂ solution+100 mL 2.0 mol/L NH₄Cl solution.