Dechlorination of PVC waste pyrolysis process using nanoparticle Fe0/Fe2O3 coated on granular activated carbon
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Abstract
This research enhanced the modification of activated carbon adsorbents use for polyvinyl chloride (PVC) dechlorination unit. The chlorinated gaseous product was generated via the pyrolysis process of the PVC plastic under an atmosphere of nitrogen gas and a temperature of 400ºC. The retention time of adsorption was varied from 30 to 240 minutes. Adsorbents used in this study were granular activated carbon (GAC), ferric (lll) oxide coated activated carbon (Fe2O3/GAC), and 2.5 wt.% and 5.0 wt.% of zero-valent iron nanoparticles coated activated carbon (Fe-2.5/GAC, Fe-5.0/GAC). The batch PVC pyrolysis process at 400oC for 60 minutes resulted in the weight decomposition of 70 wt.%. The experiment of the dechlorinated unit shown that the GAC adsorbent has increasingly adsorbed the Cl moieties and the adsorption rate yielded approximately in 0.74×10-3 mg Cl/(g.min). For the GAC adsorbent coating with 5 wt.% Fe, the adsorption rate was increased to be 1.73×10-3 mg Cl/(g.min). The adsorption capacity as well as its efficiency for the Fe-5.0/GAC sample resulted in 0.208 mg/g and 70%, respectively. The surface characteristic of pre- and post-tested adsorbents were examined using the SEM-EDX technique. The observation illustrated several white grains deposited on the adsorbent surface for the post-tested sample. It was considered a component of adsorbed chlorinated. Adsorption isotherm for each tested adsorbents could be explained by Freundlich adsorption model.
Article Details
บทความที่ได้รับการตีพิมพ์เป็นลิขสิทธิ์ของ วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยอุบลราชธานี
ข้อความที่ปรากฏในบทความแต่ละเรื่องในวารสารวิชาการเล่มนี้เป็นความคิดเห็นส่วนตัวของผู้เขียนแต่ละท่านไม่เกี่ยวข้องกับมหาวิทยาลัยอุบลราชธานี และคณาจารย์ท่านอื่นๆในมหาวิทยาลัยฯ แต่อย่างใด ความรับผิดชอบองค์ประกอบทั้งหมดของบทความแต่ละเรื่องเป็นของผู้เขียนแต่ละท่าน หากมีความผิดพลาดใดๆ ผู้เขียนแต่ละท่านจะรับผิดชอบบทความของตนเองแต่ผู้เดียว
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