摘要:
An embodiment of the present invention relates to a method for treating spent caustic soda generated from an oil refinery process, a petrochemical process, etc. through a process in which a series of treatment steps are integrated, wherein the method can constitute a process under a mild condition excluding high temperature and/or high pressure conditions and can be advantageous to a post treatment process since the amount of by-products is small.
摘要:
The present invention relates to a total-body exerciser, and more particularly, to a total-body exerciser capable of rotating and vertically moving each part of the body in order to exercise the waist, back, abdomen, and knee joints. The total-body exerciser according to the present invention comprises: an upper-body exercising unit; a buttocks exercising unit; and an ankle exercising unit. The upper-body exercising unit comprises: an upper-body support for supporting the upper body; an upper-body supporting guide rail formed on the bottom surface of the upper-body support and enabling the upper-body support to move horizontally; and a rotating bracket mounted on a lower surface of the upper-body supporting guide rail so as to enable the upper-body support to rotate about a base frame contacting the ground. The buttocks exercising unit comprises: a buttocks support for supporting the buttocks; and a buttocks-supporting height-adjusting cylinder connected to a lower portion of the buttocks support, and capable of adjusting the height of the buttocks support. The ankle exercising unit comprises: an ankle support for supporting an ankle; an ankle-supporting guide rail formed on a bottom surface of the ankle support and enabling horizontal movement of the ankle support; and a rotating bracket mounted on a lower surface of the ankle-support guide rail to enable the ankle support to rotate about a base frame contacting the ground.
摘要:
Disclosed herein is a filtering structure, including: a filtering medium for removing impurities from gas produced by gasifying coal or biomass; and a catalyst for converting methane and carbon dioxide into synthesis gas by a dry reforming reaction and a steam reforming reaction, wherein the filtering device is coated with the catalyst. The filtering structure is advantageous in that an additional process of separating and treating greenhouse gas, such as carbon dioxide, methane or the like, is not required, so that additional treating facilities are not required, thereby reducing additional costs. Further, the filtering structure is advantageous in that the amount of the discharged carbon dioxide, methane or the like can be reduced, thus providing an environment-friendly effect.
摘要:
The present invention relates to a catalyst for selective oxidative desulfurization having a prolonged lifetime, and a preparation method thereof. More specifically, the present invention relates to a catalyst for selective oxidative desulfurization, and a preparation method thereof, wherein a catalyst for selective oxidative desulfurization in which the surface of a silica support is modified to be hydrophobic through silylation using an organic silane compound is further provided to a catalyst for selective oxidative desulfurization in which a predetermined amount of transition metals are supported in a silica support, thereby maximizing selective oxidative desulfurization performance to petroleum hydrocarbons having a high sulfur compound content and preventing sulfone compounds, by-products of selective oxidative desulfurization, from being deposited on the support of the catalyst to extend the lifetime of the catalyst to the maximum. In addition, the present invention relates to a method for preparing the catalyst for selective oxidative desulfurization, comprising: the first step of injecting in an organic solvent a transition metal precursor and a chelating agent for reaction thereof; the second step of injecting a support to an aqueous solution for mixture thereof; the third step of mixing and stirring the solutions prepared at the first and second steps; and the fourth step of drying and sintering the solution prepared at the third step. The catalyst prepared by the preparation method maintains a high catalytic activity and has an increased lifetime by preventing the formation and aggregation of large active metals showing a low reactivity in case of supporting an active metal component.
摘要:
The present invention relates to a method for preparing an organic phase-change material (PCM) by means of a hydrotreating reaction of animal and plant oils. More particularly, the present invention relates to a method for preparing an organic phase-change material, which involves controlling a reaction temperature, a reaction pressure, and a supporting material for a catalyst so as to selectively adjust the weight ratio of the organic phase-change material when the organic phase change material is prepared by a hydrotreating reaction of animal and plant oils, thus obtaining the organic phase-change material in an inexpensive manner.
摘要:
The present invention relates to a method for preparing an organic phase-change material (PCM) by means of a hydrotreating reaction of animal and plant oils. The method for preparing an organic phase-change material according to the present invention can enable the preparation of a high-purity organic phase-change material in an inexpensive manner as compared to conventional preparation methods in which organic phase-change materials are obtained from kerosene through absorption and desorption processes.
摘要:
The present invention relates to a catalyst for selective oxidative desulfurization having a prolonged lifetime, and a preparation method thereof. More specifically, the present invention relates to a catalyst for selective oxidative desulfurization, and a preparation method thereof, wherein a catalyst for selective oxidative desulfurization in which the surface of a silica support is modified to be hydrophobic through silylation using an organic silane compound is further provided to a catalyst for selective oxidative desulfurization in which a predetermined amount of transition metals are supported in a silica support, thereby maximizing selective oxidative desulfurization performance to petroleum hydrocarbons having a high sulfur compound content and preventing sulfone compounds, by-products of selective oxidative desulfurization, from being deposited on the support of the catalyst to extend the lifetime of the catalyst to the maximum. In addition, the present invention relates to a method for preparing the catalyst for selective oxidative desulfurization, comprising: the first step of injecting in an organic solvent a transition metal precursor and a chelating agent for reaction thereof; the second step of injecting a support to an aqueous solution for mixture thereof; the third step of mixing and stirring the solutions prepared at the first and second steps; and the fourth step of drying and sintering the solution prepared at the third step. The catalyst prepared by the preparation method maintains a high catalytic activity and has an increased lifetime by preventing the formation and aggregation of large active metals showing a low reactivity in case of supporting an active metal component.
摘要:
The present invention relates to a catalyst having surface-modified metal nanoparticles immobilized in a stationary phase in which a polymer electrolyte membrane is formed, and a preparation method thereof. The catalyst of the present invention may be used in a process for producing hydrogen peroxide by direct synthesis from oxygen and hydrogen.
摘要:
This invention relates to a method of preparing a mixed manganese ferrite coated catalyst, and a method of preparing 1,3-butadiene using the same, and more particularly, to a method of preparing a catalyst by coating a support with mixed manganese ferrite obtained by co-precipitation at 10 ~ 40℃ using a binder and to a method of preparing 1,3-butadiene using oxidative dehydrogenation of a crude C4 mixture containing n-butene and n-butane in the presence of the prepared catalyst. This mixed manganese ferrite coated catalyst has a simple synthetic process, and facilitates control of the generation of heat upon oxidative dehydrogenation and is very highly active in the dehydrogenation of n-butene.
摘要:
Disclosed herein is a catalyst for aqueous-phase reforming of biomass-derived polyols, which comprises platinum and copper as active metals and a mixture of magnesia and alumina as a support. The catalyst contains a small amount of platinum and, at the same time, has high hydrogen selectivity and low methane selectivity.