Details

Autor(en) / Beteiligte

• Hao, Shu
• Yuling, Liu
• Yang, Jia

Titel

Construction of Cu-BTC by carboxylic acid organic ligand and its application in low temperature SCR denitration

Ist Teil von

• The Science of the total environment, 2022-05, Vol.820, p.152984-152984, Article 152984

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2022

Quelle

MEDLINE

Beschreibungen/Notizen

• The removal of NO has always been a hot issue in the treatment of coal-fired flue gas. In this paper, a hydrothermal synthesis method was used to prepare porous denitration catalysts with polycarboxyl organic isomers (trimellitic acid, phthalic acid, and benzoic acid). And then developed as the NO removing catalysts for low temperature selective catalytic reduction (SCR) with NH3. XRD, BET, SEM, FTIR, XPS, Raman, H2-TPR, NH3-TPD and TG were used to analyze the crystallinity, microscopic morphology, surface functional groups and metal content. The results showed that: (1) From the crystal structure analysis, the catalyst prepared with 1,3,5 and 1,2,4-benzenetricarboxylic acid as ligands (1,3,5-A and 1,2,4-B) was Cu-BTC. (2) 1,3,5-A catalyst had a huge specific surface area, up to 1421.32 m2/g, and a pore volume up to 0.5798 cm3/g. (3) The prepared catalysts were applied to NH3-SCR denitration, and the catalyst with Cu-BTC structure had relatively high catalytic performance, and the overall catalytic capacity showed an increasing trend with the temperature. (4) 1,3,5-A catalyst had stability and catalytic activity. When the temperature was 270 °C, the denitration efficiency reached 83.87%. And within 8 h, the denitration efficiency was stable up to 82%. [Display omitted] •Different carboxylic acid ligands form different catalyst structures.•Cu-BTC can be used as catalyst in denitration.•Cu-BTC has the best structure under 1,3,5-trimellitic acid.•Cu2+ participates in the removal of NO, and part of Cu2+ is converted to Cu+.