Disclosed are a catalyst for preparing a synthetic gas through dry reforming, a method preparing the catalyst, and a method using the catalyst for preparing the synthetic gas. The catalyst may include: a support including regularly distributed mesopores; metal nanoparticles supported on the support; and a metal oxide coating layer coated on a surface of the support.

Embodiments of the present invention include a filter element for decomposing contaminants including a substrate, and a photocatalytic composition comprising at least a photocatalyst and a co-catalyst. The embodiments of the present invention also includes a system for decomposing contaminants including a substrate, and a photocatalytic composition comprising at least a photocatalyst and a co-catalyst; and a method using the system.

Embodiments of the present invention include a filter element for decomposing contaminants including a substrate, and a photocatalytic composition comprising at least a photocatalyst and a co-catalyst. The embodiments of the present invention also includes a system for decomposing contaminants including a substrate, and a photocatalytic composition comprising at least a photocatalyst and a co-catalyst; and a method using the system.

A CNT production apparatus 1 provided by the present invention includes a cylindrical chamber 10 and a control valve 60 provided to a gas discharge pipe 50. The chamber 10 includes a reaction zone provided in a partial range of the chamber 10 in the direction of the cylinder axis, a deposition zone 22 which is provided downstream of the reaction zone 20, and a deposition state detector 40 that detects a physical property value indicating a deposition state of carbon nanotubes in the deposition zone 22. The apparatus is configured to close the control valve 60 and deposit carbon nanotubes in the deposition zone 22 when the physical property value detected by the deposition state detector 40 is equal to or less than a predetermined threshold value, and configured to open the control valve 60 and recover the carbon nanotubes deposited in the deposition zone 22 when the physical property value exceeds the predetermined threshold value.

Embodiments of the present invention relates to integrated catalyst systems and associated processes that directly converts carbon dioxide or carbohydrate to CO, methane, or other valuable chemicals at room temperature and atmospheric pressure, requiring no extra energy. The integrated catalyst systems are comprised of nitrogenous heterocyclic compounds and at least two metal elements, wherein one metal element needs to be active than the other one. The integrated catalyst systems can be applied to reduce carbon dioxide and carbohydrate at room temperature with considerable conversion efficiency. The reduction process involves the steps of: a) nitrogenous heterocyclic compounds performance as solvent/major catalyst, dual component as reducing agent / co-catalyst; b) introducing the above integrated catalysts into the reactor full of CO.sub.2 or carbohydrate, and keeping stirring the reacting system for 1 to 4 hours, without any illumination or heating; c) CO, methane, or other reduction product is achieved with a conversion efficiency of about 100%; d) the reduction products are gases, which can be directly separated from the system without any additional separation process or involving additional chemicals.

A device for production and use of a disinfectant. The device may be used to disinfect materials or objects exposed to viruses and/or bacteria. In particular, the device is capable of converting at least one first reagent such as an alcohol and at least one second reagent including an oxidant into an active disinfectant agent. A catalytic system is incorporated into the reaction vessel to produce the active disinfectant as needed for the disinfection process.

A device for production and use of a disinfectant. The device may be used to disinfect materials or objects exposed to viruses and/or bacteria. In particular, the device is capable of converting at least one first reagent such as an alcohol and at least one second reagent including an oxidant into an active disinfectant agent. A catalytic system is incorporated into the reaction vessel to produce the active disinfectant as needed for the disinfection process.

A device for production and use of a disinfectant. The device may be used to disinfect materials or objects exposed to viruses and/or bacteria. In particular, the device is capable of converting at least one first reagent such as an alcohol and at least one second reagent including an oxidant into an active disinfectant agent. A catalytic system is incorporated into the reaction vessel to produce the active disinfectant as needed for the disinfection process.

A device for production and use of a disinfectant. The device may be used to disinfect materials or objects exposed to viruses and/or bacteria. In particular, the device is capable of converting at least one first reagent such as an alcohol and at least one second reagent including an oxidant into an active disinfectant agent. A catalytic system is incorporated into the reaction vessel to produce the active disinfectant as needed for the disinfection process.

The present invention relates to the field of isobutylene preparation. Disclosed are a catalyst and preparation method thereof, and method for preparing isobutylene by applying the same; the catalyst has a core-shell structure, the core an amorphous silica-alumina particle and/or an aggregate molding thereof, and the shell aluminum oxide comprising silicon and tin; the weight ratio of aluminum oxide comprising silicon and tin to amorphous silica-alumina is 1:60-1:3; in the aluminum oxide comprising silicon and tin, on basis of the weight of aluminum oxide comprising silicon and tin, the content of silicon is 0.5-2 wt %, and of tin is 0.2-1 wt %. The catalyst of the present invention is used to catalyze a mixture of MTBE and TBA to prepare isobutylene, enabling the MTBE cleavage reaction and TBA dehydration reactions to be conducted simultaneously to generate isobutylene, achieving higher conversion rates of TBA and MTBE, and higher selectivity for generating isobutylene.