Removal of HCl from a gas phase by MgO under atmospheric conditions
Ensuring the safety of researchers by protecting them from exposure to toxic gases in laboratories is of paramount importance. This study investigated the effectiveness of using high-surface-area MgO to remove HCl under atmospheric conditions. Two types of MgO were synthesized through the thermal de...
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Taylor & Francis Group
2025-12-01
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| Series: | Science and Technology of Advanced Materials |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/14686996.2025.2454215 |
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| author | Michiko Kitagawa Hiromi Matsuhashi Masanori Kidera Kazuya Takahashi Takahiro Kondo |
| author_facet | Michiko Kitagawa Hiromi Matsuhashi Masanori Kidera Kazuya Takahashi Takahiro Kondo |
| author_sort | Michiko Kitagawa |
| collection | DOAJ |
| description | Ensuring the safety of researchers by protecting them from exposure to toxic gases in laboratories is of paramount importance. This study investigated the effectiveness of using high-surface-area MgO to remove HCl under atmospheric conditions. Two types of MgO were synthesized through the thermal decomposition 1-1-1, Tennodai, Tsukuba, of Mg(OH)2 and MgC2O4·2 H2O. HCl diluted with air passed through both MgO samples, and the amounts of HCl removed and morphological changes in the samples were compared. No significant differences in surface area or crystallinity were observed with the decomposition temperatures. X-ray diffraction analysis showed that the sample prepared from MgC2O4·2 H2O reacted with HCl immediately upon introducing HCl gas. In contrast, the sample obtained from Mg(OH)2 exhibited only MgO peaks, even 30 min after the introduction of HCl gas. Microscopic analysis revealed that the samples derived from Mg(OH)2 showed no significant changes in shape after the reaction, whereas the MgO prepared from MgC2O4·2 H2O exhibited substantial changes in overall shape. No correlation was observed between the surface area and the amount of HCl removed. When MgO is prepared from MgC2O4·2 H2O, the reaction occurs in the bulk material, whereas when MgO is prepared from Mg(OH)2, the reaction hardly progresses after HCl adsorbs onto the MgO surface. The order of magnitude of HCl removal was consistent with the base catalytic activity of the decomposition of diacetone alcohol to acetone. These results suggest that, compared with MgO obtained from Mg(OH)2, MgO derived from MgC2O4·2 H2O generates more active sites, resulting in the reaction with HCl from surface to progress into bulk. |
| format | Article |
| id | doaj-art-ff89169b2d0a412cb004c187c6b54e27 |
| institution | Kabale University |
| issn | 1468-6996 1878-5514 |
| language | English |
| publishDate | 2025-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Science and Technology of Advanced Materials |
| spelling | doaj-art-ff89169b2d0a412cb004c187c6b54e272025-02-04T11:42:26ZengTaylor & Francis GroupScience and Technology of Advanced Materials1468-69961878-55142025-12-0126110.1080/14686996.2025.2454215Removal of HCl from a gas phase by MgO under atmospheric conditionsMichiko Kitagawa0Hiromi Matsuhashi1Masanori Kidera2Kazuya Takahashi3Takahiro Kondo4Graduate School of Science and Technology, University of Tsukuba, Tsukuba, Ibaraki, JapanDepartment of Science, Hokkaido University of Education, Hakodate, Hokkaido, JapanNishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama, JapanNishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama, JapanDepartment of Materials Science, Institute of Pure and Applied Sciences, University of Tsukuba, Ibaraki, JapanEnsuring the safety of researchers by protecting them from exposure to toxic gases in laboratories is of paramount importance. This study investigated the effectiveness of using high-surface-area MgO to remove HCl under atmospheric conditions. Two types of MgO were synthesized through the thermal decomposition 1-1-1, Tennodai, Tsukuba, of Mg(OH)2 and MgC2O4·2 H2O. HCl diluted with air passed through both MgO samples, and the amounts of HCl removed and morphological changes in the samples were compared. No significant differences in surface area or crystallinity were observed with the decomposition temperatures. X-ray diffraction analysis showed that the sample prepared from MgC2O4·2 H2O reacted with HCl immediately upon introducing HCl gas. In contrast, the sample obtained from Mg(OH)2 exhibited only MgO peaks, even 30 min after the introduction of HCl gas. Microscopic analysis revealed that the samples derived from Mg(OH)2 showed no significant changes in shape after the reaction, whereas the MgO prepared from MgC2O4·2 H2O exhibited substantial changes in overall shape. No correlation was observed between the surface area and the amount of HCl removed. When MgO is prepared from MgC2O4·2 H2O, the reaction occurs in the bulk material, whereas when MgO is prepared from Mg(OH)2, the reaction hardly progresses after HCl adsorbs onto the MgO surface. The order of magnitude of HCl removal was consistent with the base catalytic activity of the decomposition of diacetone alcohol to acetone. These results suggest that, compared with MgO obtained from Mg(OH)2, MgO derived from MgC2O4·2 H2O generates more active sites, resulting in the reaction with HCl from surface to progress into bulk.https://www.tandfonline.com/doi/10.1080/14686996.2025.2454215MgOremove HClsurface areaactive siteatmospheric conditionbase |
| spellingShingle | Michiko Kitagawa Hiromi Matsuhashi Masanori Kidera Kazuya Takahashi Takahiro Kondo Removal of HCl from a gas phase by MgO under atmospheric conditions Science and Technology of Advanced Materials MgO remove HCl surface area active site atmospheric condition base |
| title | Removal of HCl from a gas phase by MgO under atmospheric conditions |
| title_full | Removal of HCl from a gas phase by MgO under atmospheric conditions |
| title_fullStr | Removal of HCl from a gas phase by MgO under atmospheric conditions |
| title_full_unstemmed | Removal of HCl from a gas phase by MgO under atmospheric conditions |
| title_short | Removal of HCl from a gas phase by MgO under atmospheric conditions |
| title_sort | removal of hcl from a gas phase by mgo under atmospheric conditions |
| topic | MgO remove HCl surface area active site atmospheric condition base |
| url | https://www.tandfonline.com/doi/10.1080/14686996.2025.2454215 |
| work_keys_str_mv | AT michikokitagawa removalofhclfromagasphasebymgounderatmosphericconditions AT hiromimatsuhashi removalofhclfromagasphasebymgounderatmosphericconditions AT masanorikidera removalofhclfromagasphasebymgounderatmosphericconditions AT kazuyatakahashi removalofhclfromagasphasebymgounderatmosphericconditions AT takahirokondo removalofhclfromagasphasebymgounderatmosphericconditions |