多孔材料烷烃/烯烃分离技术的研究

doi:10.11962/1006-4990.2018-0467

Abstract

Abstract:

The adsorption and separation properties of porous materials such as silica gel,γ-Al₂O₃,13X molecular sieve,Y molecular sieve and ZSM-5 molecular sieve on alkane/olefin were investigated on a small fixed bed（200 mL） reactor using simulated oil as raw material.The alkane/olefin separation effect of silica gel was the best.Under the conditions of adsorption temperature of 40 ℃,pressure of 0.5 MPa and desorbent of n-octane/methylcyclohexane,the alkane/olefin separation degree was up to 0.81.Compared with other types of silica gel,type B silica gel with an average pore diameter of 4~6 nm had better mass transfer effect,and the adsorption-desorption process turned to be more balanced.The regenerated adsorbents by roasting and solvent,compared with fresh agent,the separation effect did not decreased obviously.

Key words: porous material, silica gel, separation degree of alkanes/olefin, mass transfer effect

CLC Number:

TQ463.21

Zhao Chuang,Li Ben,Fan Jingxin,Zang Jiazhong,Ma Yuming,Li Bin,Sun Zhenhai,Gong Yupeng,Yu Haibin. Study on alkanes/olefin separation technology of porous material[J]. Inorganic Chemicals Industry, 2019, 51(8): 79-82.

Figures/Tables 11

References 8

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吸附剂	w（SiO₂）/%	w（Al₂O₃）/%	w（Na₂O）/%	来源
γ-Al₂O₃	0.742	98.8	0.029 8	河南建龙公司
A型硅胶	98.7	0.537	0.217	河南建龙公司
B型硅胶	98.9	0.521	0.207	河南建龙公司
C型硅胶	99.1	0.519	0.202	河南建龙公司
13X分子筛	47.9	31.8	16.6	天津化学试剂公司
Y分子筛	65.5	21.6	12.6	天津化学试剂公司
ZSM-5分子筛	99.0	0.706	0.11	天津化学试剂公司

吸附剂	R_烷/烯	烯烃脱附速率S_d /min	吸脱速率比 S_a /S_d
γ-Al₂O₃	0.12	45.72	0.86
A型硅胶	0.81	47.45	0.85
13X分子筛	0.37	39.71	0.98
Y分子筛	0.35	38.21	0.95
ZSM-5分子筛	0.21	26.16	1.07

吸附剂	孔径/nm	R_烷/烯	烯烃脱附速率S_d/min	吸脱速率比 S_a/S_d
A型硅胶	2.4	0.81	47.45	0.85
B型硅胶	5.6	0.80	31.38	1.02
C型硅胶	7.2	0.75	19.95	1.15
大孔硅胶	10.5	0.55	12.03	1.23

吸附剂	脱附温度/℃	L酸/B酸
B型硅胶	150	0.036 9
B型硅胶	450	0.030 1

焙烧温度/℃	R_烷/烯	焙烧温度/℃	R_烷/烯
450	0.65	650	0.68
550	0.79	700	0.55

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Study on alkanes/olefin separation technology of porous material

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