Products distribution of guaiacol pyrolysis at different temperatures^a.

Reactant	Guaiacol	Guaiacol	Guaiacol	Guaiacol
Temperature	300	350	400	450
Conversion (%)
Guaiacol	66.03	86.89	99.86	98.43
Yield (%)
PMB	3.73	4.66	9.49	7.79
HMB	3.05	16.45	38.92	25.96
Methylated guaiacol	15.55	8.42	—	—
Benzene, 1,2-dimethoxy	7.82	4.04	—	—
Catechol and methylated catechol	4.87	3.19	—	—
Mesitylene	—	0.34	1.35	3.37
Benzene, 1,2,4,5-tetramethyl	—	0.57	2.29	3.84
Benzene, 1,2-diethyl-3,4-dimethyl	—	0.95	1.35	2.45
Phenol, 2,6-dimethyl-	0.33	0.34	0.21	11.55
Phenol, 2,4,6-trimethyl-	2.07	3.4	0.72	3.66
Phenol, 2,3,5,6-tetramethyl	7.52	10.49	2.37	5.28
Phenol,2-(1,1-dimethylethyl)-3-methyl	9.47	15.02	1.98	4.54

^aReaction condition: catalyst = 33-SA, N₂ = 50 mL min⁻¹, WHSV = 4 h⁻¹, methanol to guaiacol molar ratio = 25.