Electrothermal regeneration by Joule heat effect on carbon cloth based MnO2 catalyst for long-term formaldehyde removal

Zou, Nan; Nie, Qing; Zhang, Xinrui; Zhang, Gaoke; Wang, Jinlong; Zhang, Pengyi

doi:10.1016/j.cej.2018.09.117

Cited by 96 publications

(43 citation statements)

References 49 publications

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“…The two broad peaks at 22.8 and 43, corresponding to the (002) and (100) crystal planes of carbon, are typical diffraction peaks of disordered graphite (Wang et al, 2014;Huang et al, 2015). After LACFP was impregnated with MnSO 4 and KMnO 4 , respectively, it generated different diffraction peaks at 12.1, 24.5, 36.1, and 64.8, which were ascribed to the (001), (002), (−111), and (020) crystal facets, respectively, and are characteristic peaks of δ-MnO 2 according to JCPDS 80-1098 (Zhang et al, 2015;Zou et al, 2019). Moreover, all the peaks of δ-MnO 2 in the composite are in accordance with those of pure MnO 2 .…”

Section: Characterization Analysis Of Lacfp and Mno 2 -Loaded Lacfpmentioning

confidence: 98%

Preparation of Lignocellulose-Based Activated Carbon Paper as a Manganese Dioxide Carrier for Adsorption and in-situ Catalytic Degradation of Formaldehyde

Zhang

Lin

et al. 2019

Front. Chem.

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Formaldehyde is a colorless, highly toxic, and flammable gas that is harmful to human health. Recently, many efforts have been devoted to the application of activated carbon to absorb formaldehyde. In this work, lignocellulose-based activated carbon fiber paper (LACFP) loaded with manganese dioxide (MnO 2) was fabricated for the adsorption and in-situ catalytic degradation of formaldehyde. LACFP was prepared by two-stage carbonization and activation of sisal hemp pulp-formed paper and was then impregnated with manganese sulfate (MnSO 4) and potassium permanganate (KMnO 4) solutions; MnO 2 then formed by in situ growth on the LACFP base by calcination. The catalytic performance of MnO 2-loaded LACFP for formaldehyde was then investigated. It was found that the suitable carbonization conditions were elevating the temperature first by raising it at 10 • C/min from room temperature to 280 • C, then at 2 • C/min from 280 to 400 • C, maintaining the temperature at 400 • C for 1 h, and then increasing it quickly from 400 to 700 • C at 15 • C/min. The conditions used for activation were similar to those for carbonization, with the temperature additionally being held at 700 • C for 2 h. The conditions mentioned above were optimized to maintain the fiber structure and shape integrity of the paper, being conducive to loading with catalytically active substances. Regarding the catalytic activity of MnO 2-loaded LACFP, the concentration of formaldehyde decreased by 59 ± 6 ppm and the concentration of CO 2 increased by 75 ± 3 ppm when the reaction proceeded at room temperature for 10 h. The results indicated that MnO 2-loaded LACFP could catalyze formaldehyde into non-toxic substances.

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Section: Characterization Analysis Of Lacfp and Mno 2 -Loaded Lacfpmentioning

confidence: 98%

Preparation of Lignocellulose-Based Activated Carbon Paper as a Manganese Dioxide Carrier for Adsorption and in-situ Catalytic Degradation of Formaldehyde

Zhang

Lin

et al. 2019

Front. Chem.

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“…Actualmente numerosos estudios van encaminados a determinar qué materiales resultan más convenientes para el proceso de adsorción, encontrándose entre los más estudiados los nanotubos de carbón, las nanofibras de carbón y los carbones activados (TCA) (Hernández, Jiménez, Mondragón & López, 2007). Las TCA con su estructura porosa y tridimensionalmente conectada, son prometedoras para la preparación de telas multifuncionales debido a su conductividad eléctrica y térmica, su flexibilidad y su ligereza (Zou et al, 2019). Además, las propiedades únicas de adsorción y la estructura de la tela los convierte en materiales ideales para el confinamiento y almacenamiento de portadores de energía altamente densos, como el hidrógeno (Sevilla, Fuertes & Mokaya, 2011) y metano (CH 4 ) (Lozano-Castello, Alcaniz-Monge, De la Casa-Lillo, Cazorla-Amorós & Linares-Solano, 2002), captura y separación de emisiones de gases de efecto invernadero no deseadas, como el dióxido de carbono (CO 2 ) (Adeniran & Mokaya, 2015).…”

Section: Uso De Tca Como Supercapacitores Flexiblesunclassified

Telas de carbón activado: generalidades y aplicaciones

2019

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Los carbones activados (CA) son de gran interés debido a las excepcionales propiedades físicas y químicas que poseen, estos materiales se presentan en forma de gránulos o polvos, pero recientemente se ha comercializado una nueva forma de CA conocida como Fibra de Carbón Activado (FCA), que se puede fabricar en dos presentaciones, como tela y como fieltro. Las Telas de carbón activado (TCA) son materiales que poseen excelentes propiedades que las hacen superiores en comparación con las formas tradicionales y se producen a partir de precursores, mediante diversos procesos que incluyen activación física o química, entre los agentes impregnantes más utilizados se encuentran el KOH, H3PO4, ZnCl2, AlCl3, NH4Cl, Na2CO3 y K2CO3, cuya función principal es servir como deshidratantes impidiendo al mismo tiempo la producción de alquitranes. Las características y propiedades que adquieren las TCA dependen de la naturaleza del material que se utilizó para producirlas, estas características han sido aprovechadas en una gran cantidad de aplicaciones, como: medicina, sistemas de soporte de catalizadores, en la industria para la adsorción de contaminantes, purificación de aguas y tratamiento de aguas residuales, entre otras. Esta revisión muestra las generalidades y aplicaciones en estudios recientes y resume las aplicaciones de las TCA de las diferentes investigaciones realizadas, así como su proceso de obtención.

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“…Thus, effective indoor air cleaning technologies for formaldehyde are urgently needed. 10,11 Several methods have been used to clean indoor air: catalytic oxidation 12,13 and photocatalytic oxidation. 14,15 The present study's method, adsorption, is widely used because it is simple, effective, and inexpensive, 16 but the removal capacity and life span of adsorption-based purifier are limited by sorbents.…”

Section: Introductionmentioning

confidence: 99%

Gaseous formaldehyde removal: A laminated plate fabricated with activated carbon, polyimide, and copper foil with adjustable surface temperature and capable of in situ thermal regeneration

Chen

Xiao

et al. 2019

Indoor Air

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Formaldehyde is one of the most common indoor air pollutants in Chinese residences. This study introduces a novel laminated plate with adjustable surface temperature to remove gaseous formaldehyde. The plate is fabricated with activated carbon, polyimide, and copper foil via thermal compression. The plate can be regenerated in situ by applying a direct current to the copper foil. Adsorption‐regeneration cycle tests were conducted to evaluate the plate's formaldehyde removal performance. The overall removal efficiency of the fabricated laminated plate with glue mass fraction of 25% and thickness of 1.5 mm was about 30% at the face velocity of 0.8‐1.2 m/s. The pressure drop was about 5 Pa. Its removal ability can be regenerated in situ in 8 minutes by increasing the surface temperature to 80°C. The fabricated laminated plate showed good durability after 52 cycles of adsorption‐regeneration tests. The results indicate that the proposed laminated plate can enhance the purifying efficiency and enlarge the life span of ordinary, cheap sorbents. It makes cheap materials with low performance suitable for air purification.

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Electrothermal regeneration by Joule heat effect on carbon cloth based MnO2 catalyst for long-term formaldehyde removal

Cited by 96 publications

References 49 publications

Preparation of Lignocellulose-Based Activated Carbon Paper as a Manganese Dioxide Carrier for Adsorption and in-situ Catalytic Degradation of Formaldehyde

Preparation of Lignocellulose-Based Activated Carbon Paper as a Manganese Dioxide Carrier for Adsorption and in-situ Catalytic Degradation of Formaldehyde

Telas de carbón activado: generalidades y aplicaciones

Gaseous formaldehyde removal: A laminated plate fabricated with activated carbon, polyimide, and copper foil with adjustable surface temperature and capable of in situ thermal regeneration

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