分子筛基脱硫吸附剂的制备及脱硫性能评价

摘要

The adsorbent for removing sulfur was prepared by dipping molecular sieve in the Cu salt solution which had equal volume with the sieve,and its desulfidation capability from liquefied petroleum gas ( LPG) were evaluated in a fixed bed and an industrial side device. The results obtained from fixed bed showed that sulfide breakthrough capacity of the adsorbent reached 6. 20% when the sulfide content in LPG was 1 200 mg/m3 . The results obtained from industrail side device showed that the adsorbentcould decrease the content of the sulfide in LPG to below 1 mg/m at ambient temperature, reaction pressure of 1.0 Mpa and space velocity of 0. 5 h-1 when the sulfide content in feedstock ranged from 199 mg/m3 to 558 mg/m3. The adsorbent regenerated for two times could still keep the sulfide content below 1 mg/m3 in 278 hours continous running.%采用等体积浸渍法,以分子筛为载体,经Cu盐改性后制备出吸附脱硫剂,并在实验室固定床吸附脱硫评价装置及工业侧线评价装置上,分别考察了所制备吸附剂对液化石油气( LPG)中硫化物的脱除能力.固定床吸附脱硫评价实验结果表明,当原料LPG中的总硫含量为1 200 mg/m3,该吸附剂的穿透硫容达6.20％.工业侧线试验结果表明,在吸附温度为环境温度、吸附压力为1.0 MPa、吸附空速为0.5h-1的工艺条件下,当原料LPG中的硫含量从190 mg/m3至558 mg/m3波动时,该吸附剂能将LPG中的硫含量降至1 mg/m3以下；吸附剂经2次再生后,连续运行278 h时,净化后LPG中的硫含量仍小于1 mg/m3.