Authors:Wang Zaihua, Li Xinjun, Song Wenji, Chen Jinfa, Li Tao, and Feng Ziping
. When H 2 O was eliminated from the feed gas mixture, The NO X conversion increased slightly. However, it could not recover to the initial value; only 62% NO X conversion could be reached. This indicated that the resistance to H 2 O of the catalyst was
La0.8Cu0.2MnO3 and La0.8Sr0.2MnO3 perovskite catalysts were prepared by the co-precipitation method. The resistance of these catalysts to sulfur poisoning
was tested via catalytic combustion of toluene. The results show that the perovskite catalysts were poisoned in the presence
of SO2. In the presence of dodecyl mercaptan (C12H25SH), La0.8Sr0.2MnO3 exhibits better resistance to sulfur poisoning than La0.8Cu0.2MnO3. It was determined that the SO2 deactivation is due to the formation of CuSO4 on the catalyst surface.
Authors:Yeqiang Chen, Shenfeng Yuan, Hong Yin, Zhirong Chen, and Chunqiang Mao
by the dry catalyst, the catalyst as supplied was used in the kinetic experiments.
Elimination of external and internal mass transfer resistance
The experiments to obtain kinetics should be carried out under the
Authors:Everton Fernando Zanoelo and Cristina Benincá
point, it is relevant to highlight that k 2 ≫ X . Then Eq. 9 is reduced to Eq. 15 or 16 . It is easy to recognize that the latter depends only on the reaction rate constant, what means that the external resistance for oxygen transport is
Authors:V. Gnana Glory Kanmoni, Sheeba Daniel, and G. Allen Gnana Raj
]. Photocatalysis based on the TiO 2 semiconductor is very promising and it has attracted extensive interest for the mineralization of pollutants both in air and water. Titania based photocatalysis has advantages such as strong resistance to chemicals, resistance
) augmenting surface diffusion resistance for the reactants [ 22 ]. Such chemisorption may be of transient nature as observed in this study. Researchers [ 4 , 12 , 13 ] indicating change in the order of reaction with temperature in their empirical laws may
Authors:Bao Agula, Qing-Fang Deng, Mei-Lin Jia, Yuping Liu, Bao Zhaorigetu, and Zhong-Yong Yuan
CO and VOCs, the high cost and limited availability discourage their extensive applications. Transition metal oxides are alternatives to the noble metal-containing catalysts due to their resistance to halogens, low cost and high catalytic activity and
Authors:Behzad Koozegar Kaleji, Rasoul Sarraf-Mamoory, and Sohrab Sanjabi
advantage of not only high photocatalytic activity, but also good acid resistance, low cost, and no toxicity, which makes titanium dioxide one of the best photocatalytic agents [ 3 , 4 ].
Titania can exist as an amorphous layer and also in three