[Retracted] Research on Ethanol Coupling to Prepare C₄ Olefins Based on BP Neural Network and Cluster Analysis

Table 1

Spline interpolation to patch missing data.

Catalyst combination type	A1		A2		A6			A7
Temperature (°C)	350	400	350	400	300	325	350	300	325
Ethanol conversion rate (%)	36.8	51.6	67.9	62.7	25.5	43.4	55.8	40	48.4
C4 olefin selectivity (%)	47.21	62.68	39.1	51.46	7.18	11.54	10.65	8.84	13.90
Catalyst combination type	A8			A9			A10
Temperature (°C)	300	325	350	300	325	350	300	325	350
Ethanol conversion rate (%)	13.2	20.8	31.7	4.7	9.3	13.4	1.7	3.9	9.0
C4 olefin selectivity (%)	13.82	17.99	25.89	16.1	23.39	31.04	2.17	3.69	3.3
Catalyst combination type	A11			A12			A13
Temperature (°C)	300	325	350	300	325	350	300	325	350
Ethanol conversion rate (%)	1.6	3.3	8.2	6.9	10.9	19.9	4.1	8.2	14.6
C4 olefin selectivity (%)	1.82	3.57	4.35	11.22	18.93	22.26	12.74	17.05	23.46
Catalyst combination type	A14			B1			B2
Temperature (°C)	300	325	350	300	325	350	300	325	350
Ethanol conversion rate (%)	10.2	14.9	24	6.7	10.6	19.3	6.2	11.6	16.2
C4 olefin selectivity (%)	3.61	6.82	10.83	12.28	17.76	25.97	9.32	13.58	22.88