352 / 2018-08-01 16:09:03

Synergistic effects on properties of bio-oil/bio-char and transferring regularity of chlorine during co-pyrolysis of macroalgae Enteromorpha clathrata and polyvinyl chloride

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The present study aimed to investigate synergistic effects on properties of bio-oil/bio-char and transferring regularity of chlorine during pyrolysis of macroalgae Enteromorpha clathrata (E. clathrata) mixed with different mass percentage of polyvinyl chloride (PVC) (5%, 10%, 15%, 20%, 25%) in a fixed bed reactor. The results showed that 5% of PVC could produce the highest yield of bio-oils (42.63%) while 25% of PVC produced the lowest yield of bio-char (37.65%). From the GC–MS analysis of bio-oils, the relative content of organic acids was reduced and that of long-chair esters was increased significantly during co-pyrolysis of E. clathrata and PVC. Also, the interaction during co-pyrolysis of E. clathrata and PVC decreased the H/C ratio of bio-chars and increased the higher heat values with the mass ratio of PVC increasing. In addition, the distribution percent of chlorine in bio-oils and bio-chars increased with the increase of PVC, but the quantity was very low. The present results suggested the addition of PVC (5%) in pyrolysis of macroalgae as more favorable process for enhanced production of upgraded bio-oil.