Numerical Study to Define Initial Thermal Integration Window for Methane Oxidative Coupling with Dehydroaromatization Reactors

Table 7

Results of the tabulated coupling methodology for case 1 in Table 8.

Input layer					Reactor optimizer	Output layer
Priority	Name	Units	Initial input	Constraints	Optimum input	Name	Units	Initial output	Optimum output	Targets
OCM	Optimization case
1	Inlet temperature	°C	800	800	800	C2 yield	%	10.1	41.3	>30
2	Inlet pressure	atm	1	1	1	CH4 conv.	%	22.5	52.8
3	Feed flow rate	Std m^3/h	10,000	10,000	10,000	O2 conv.	%	81.7	100.0
4	Feed composition (CH4)	%	61.7	61.7	61.7	Reynold’s no. (particle)	—	13.3	59.8
5	Feed composition (inerts)	%	17.8	17.8	17.8	Δp (% of Pin)	%	19.0	13.6	<20
6	Superficial velocity	m/s	2.6	0.2 – 3.5	3.9	Tpeak (Tmax -Tin)	K	21.9	84.3	<100
7	Particle dia.	mm	1	0.5 – 5.0	3.0	Tlower (Tin-Tmin)	K	39.7	0.0
8	Tube dia.	cm	0.8	0.5 – 30.0	1.9	σT	K	19.8	20.7
9	Gas void fraction	—	0.5	0.5	0.5	Space time	sec	0.2	0.3
10	Catalyst void fraction	—	0.5	0.01 – 0.5	0.5	Catalyst weight	kgs	78.0	121.9
11	Flow direction	—	Cocurrent	Cocurrent	Cocurrent	No. of tubes	—	20000	1000
12	Channel length	cm	45.0	5–100	100.0
13	Tube wall thickness	mm	5.0	2–20	5.0
14	Uoverall	W/m^2.K	1000	1000–2500	1200
MDA	Optimization case
14	Inlet temperature	°C	800	800	800	C6 yield	%	1.4	0.5
15	Inlet pressure	atm	1	1	1	CH4 conv.	%	9.6	10.0	10
16	Feed flow rate	Std m^3/h	72,320	72,320	72,320	Reynold’s no. (particle)	—	2.98	13.4
17	Feed composition (inerts)	%	5	5	5	Δp (% of pin)	%	2.1	0.9	<20
18	Superficial velocity	m/s	0.5	0.2–3.5	0.8	Tpeak (Tmax -Tin)	K	1.2	9.3
19	Particle dia.	mm	1.0	0.5–5.0	3.0	Tlower (Tin -Tmin)	K	56.9	60.3	<100
20	Tube dia.	cm	6.3	0.5–30.0	21.8	σT	K	18.1	23.4
21	Gas void fraction	—	0.5	0.5	0.5	Space time	sec	0.9	1.3
22	Catalyst void fraction	—	0.5	0.1–0.5	0.5	Catalyst weight	kgs	4506	9086