{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,17]],"date-time":"2026-08-17T13:25:12Z","timestamp":1786973112112,"version":"build-2736575974"},"reference-count":55,"publisher":"American Chemical Society (ACS)","issue":"25","license":[{"start":{"date-parts":[[2024,6,12]],"date-time":"2024-06-12T00:00:00Z","timestamp":1718150400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004508","name":"Prince of Songkla University","doi-asserted-by":"publisher","award":["ENG6701121S"],"award-info":[{"award-number":["ENG6701121S"]}],"id":[{"id":"10.13039\/501100004508","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004704","name":"National Research Council of Thailand","doi-asserted-by":"publisher","award":["N41A650121"],"award-info":[{"award-number":["N41A650121"]}],"id":[{"id":"10.13039\/501100004704","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100017170","name":"Thailand Science Research and Innovation","doi-asserted-by":"publisher","award":["NA"],"award-info":[{"award-number":["NA"]}],"id":[{"id":"10.13039\/501100017170","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2024,6,25]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>This study aimed to investigate heterogeneous catalytic filaments of calcium oxide (CaO) for fused deposition modeling three-dimensional (3D) printers. The CaO catalysts were blended with acrylonitrile butadiene styrene (ABS) plastic to form catalytic filaments. A single-screw filament extruder was used to prepare the filaments, following which their mechanical properties, thermal properties, morphology, catalytic characteristics in biodiesel production, and reusability were evaluated. In accordance with the results, a maximum CaO catalyst content of 15 wt % was recommended to be blended in the ABS pellet. The hardness and compressive strength of these catalytic filaments were shown to be improved. Subsequently, the catalytic filaments with the highest CaO content (15 wt %) were used to produce methyl ester from pretreated sludge palm oil through the transesterification process. To determine the recommended conditions for achieving the highest purity of methyl ester in biodiesel, the process parameters were optimized. A methyl ester purity of 96.58 wt % and a biodiesel yield of 79.7 wt % could be achieved under the recommended conditions of a 9.0:1 methanol to oil molar ratio, 75.0 wt % catalytic filament loading, and 4.0 h reaction time. Furthermore, the reusability of the 15 wt % CaO catalytic filaments was evaluated in a batch process with multiple transesterification cycles. The results indicated that the purity of methyl ester dropped to 95.0 wt % only after the fourth cycle. The method used in this study for preparing and characterizing CaO catalytic filaments can potentially serve as a novel approach for constructing biodiesel reactors using 3D printing technology.<\/jats:p>","DOI":"10.1021\/acsomega.4c03063","type":"journal-article","created":{"date-parts":[[2024,6,12]],"date-time":"2024-06-12T11:10:35Z","timestamp":1718190635000},"page":"27578-27591","source":"Crossref","is-referenced-by-count":10,"title":["Heterogeneous Calcium\nOxide Catalytic Filaments for\nThree-Dimensional Printing: Preparation, Characterization, and Use\nin Methyl Ester Production"],"prefix":"10.1021","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6919-0637","authenticated-orcid":true,"given":"Kritsakon","family":"Pongraktham","sequence":"first","affiliation":[{"name":"Prince of Songkla University , , , ,","place":["Hat Yai, Songkhla, Thailand, 90110"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1771-5120","authenticated-orcid":true,"given":"Krit","family":"Somnuk","sequence":"additional","affiliation":[{"name":"Prince of Songkla University , , , ,","place":["Hat Yai, Songkhla, Thailand, 90110"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2024,6,12]]},"reference":[{"key":"2026081708353142000_cit1","doi-asserted-by":"publisher","DOI":"10.1016\/j.enconman.2022.115406","article-title":"Recent advances in heterogeneous catalysis for green\nbiodiesel production by transesterification","volume":"258","author":"Orege","year":"2022","journal-title":"Energy Conv. 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