Table 1.

Comparison of distributions of gas-phase products in pyrolysis of n-heptane [57,58,61,62] and microwave discharge in liquid n-heptane [43]. All values are given in wt. % (all data were recalculated on the basis of data from the original articles).

Reference	[61]	[57]	[59]	[58]	[62]	[43]
Diluent	Steam		Argon	Nitrogen	Steam
Temperature and pressure	760 °C, 101 kPa	700 °C, 9.2 kPa	640 °C, 101 kPa	810 °C, 400 kPa	760 °C, 101 kPa	~1700 °C, 101 kPa
Conversion, %	52.51	12	15	87.8	64.3
Component
hydrogen	2.08	0.11	0.059	1.6	0.34	7.13
methane	5.39	0.91	1.11	7.1	5.41	4.02
ethane	1.24	0.62	1.69	2.1	1.52	0.489
ethylene	23.1	4.25	4.02	47.8	32.0	12.45
acetylene				0.6		28.39
propane	0.39	0.053	0.13	0.5	0.38	0.052
propylene	7.47	2.24	2.98	17.3	13.3	0.779
methylacetylene				0.3	0.00	0.247
allene				0.1	0.00	0.067
n-butane	0.070		0.12	tr.	0.08	0.0031
isobutane				0.2	0.00	0.000
1-butene	4.84	1.83	2.26	4.6	6.28	0.105
trans-2-butene	0.11			0.5	0.26	0.0024
cis-2-butene	0.10					0.0019
isobutene				0.1	0.00	0.0010
1,3-butadiene	1.17		0.13	4.3	2.02	0.106
vinylacetylene						0.207
1-butyne (ethylacetylene)						0.0068
2-butyne (dimethylacetylene)						0.0007
diacetylene						0.354
n-pentane						0.0074
isopentane	0.042				0.05	0.0038
neopentane						0.000
cyclopentane						0.0018
1-pentene	1.91	1.27	1.69		1.72	0.0193
trans-2-pentene	0.070				0.09	0.0006
cis-2-pentene	0.10					0.0004
2-methyl-1-butene						0.0002
2-methyl-2-butene						0.0012
3-methyl-1-butene						0.0007
cyclopentene						0.000
isoprene						0.000
cyclopentadiene				0.3		0.012
n-hexane						0.0017
cyclohexane
methylcyclopentane
cyclohexene						0.0003
1-methylcyclopentene						0.00
1-hexene	0.82	0.71	0.81		0.55	0.00
trans-2-hexene						0.0001
cis-2-hexene
benzene				0.4		0.020
other NA C5–C6				3.7
n-heptane	47.5	88.0	85.0	12.2	35.7	45.1
toluene				0.1		0.0005
ethylbenzene				traces
xylenes				traces
styrene				traces
naphthalene				traces
other C7–C12				traces		0.390
C12+				traces
CO	3.57				0.24
CO2					0.06
SUMMA	100.0	100.0	100.0	100.0	100.0	100.0