摘要:
An exhaust purification system of an internal combustion engine comprising an exhaust treatment catalyst (13) arranged in an engine exhaust passage and a heat and hydrogen generation device (50) able to feed only heat or heat and hydrogen to the exhaust treatment catalyst (13). When the warm-up operation of the heat and hydrogen generation device (50) is completed and a reforming action by a reformer catalyst (54) becomes possible, if the temperature of the exhaust treatment catalyst (13) is a preset activation temperature or more, a partial oxidation reaction is performed at the heat and hydrogen generation device (50) and the generated heat and hydrogen are fed to the exhaust treatment catalyst (50). If the temperature of the exhaust treatment catalyst (13) is less than the preset activation temperature, a complete oxidation reaction by a lean air-fuel ratio is continued and a heat is fed to the exhaust treatment catalyst (13).
摘要:
Disclosed is a PM clean-up system which can prevent an excessive accumulation of PM particles on a filter. The PM clean-up system comprises a porous filter base material (10) through which an exhaust gas is to be passed and a catalyst component (11) supported on the filter base material (10). The system can trap PM particles contained in an exhaust gas and remove the trapped PM particles by oxidation. In the system, an active oxygen-generating microparticle (12) is carried between the catalyst components (11) on the surface of the filter base material (10). The PM particles are partially oxidized by active oxygen generated with the active oxygen-generating microparticle (12) to cause a defect therein, whereby the PM particles become susceptible to oxidation. As a result, the oxidation of the PM particles is accelerated, thereby preventing or reducing the accumulation of the PM particles.
摘要:
Cellulose contained in plant fiber material is hydrolyzed with the use of a pseudo-molten cluster acid as a hydrolysis catalyst to produce saccharide, most of which is glucose. After the glucose is produced, the saccharide is precipitated with the use of an organic solvent, and the saccharide including a solidified saccharide during the hydrolysis and the precipitated saccharide is separated from residues' and the cluster acid.
摘要:
The invention relates to a method for hydrolyzing a plant fiber material and producing and separating a saccharide including glucose. The method of the invention includes a hydrolysis process of using a cluster acid catalyst in a pseudo-molten state to hydrolyze cellulose contained in the plant fiber material and produce glucose. In the hydrolysis process, the cluster acid catalyst and a first amount of the plant fiber material that increases a viscosity of the cluster acid catalyst in a pseudo-molten state when added to the cluster acid catalyst in a pseudo-molten state are heated and mixed, and a second amount of the plant fiber material is then further added when the decrease in viscosity of the heated mixture occurs.
摘要:
The present invention is to provide a high-purity aqueous saccharide solution by increasing the collection rate of cluster acid which is a hydrolysis catalyst for cellulose in saccharification and separation for cellulose using a cluster acid catalyst. A method of saccharification and separation for plant fiber materials of the present invention comprises: a hydrolysis step of hydrolyzing cellulose contained in the plant fiber materials using a cluster acid catalyst in a pseudo-molten state to produce saccharide, most of which is glucose; a first separation step of separating a mixture containing an aqueous saccharide solution in which at least a portion of the saccharide produced in the hydrolysis step is dissolved, a cluster acid organic solvent solution in which the cluster acid catalyst is dissolved, and residues into a solid content containing the residues and a liquid content containing the aqueous saccharide solution and the cluster acid organic solvent solution; and a second separation step of dehydrating the liquid content, which contains the aqueous saccharide solution and the cluster acid organic solvent solution and is separated in the first separation step, by a dehydration means capable of absorbing water through chemical absorption to deposit the saccharide in the aqueous saccharide solution, and separating a solid content containing the saccharide from a liquid content containing the cluster acid catalyst and the organic solvent.
摘要:
Cellulose contained in plant fiber material is hydrolyzed with the use of a pseudo-molten cluster acid as a hydrolysis catalyst to produce saccharide, most of which is glucose. After the glucose is produced, the saccharide is precipitated with the use of an organic solvent, and the saccharide including a solidified saccharide during the hydrolysis and the precipitated saccharide is separated from residues' and the cluster acid.
摘要:
A process for producing a composite metal oxide of an acidic metal oxide and a basic metal oxide, wherein the process comprises (a) providing an aqueous solution containing a colloidal particle of the acidic metal oxide and a salt of the basic metal, (b) adjusting the pH of the aqueous solution to a pH at which a part of the basic metal dissolves in the aqueous solution, the remaining of the basic metal precipitates as a hydroxide and has a positive zeta potential, and the colloidal particle of the acidic metal oxide is not dissolved and has a negative surface potential, and then maintaining this pH over a predetermined time to obtain a precursor of the composite metal oxide, and (c) drying and firing the precursor of the composite metal oxide obtained.
摘要:
The present invention relates to a production process of an exhaust gas purifying catalyst, comprising impregnating a support with a solution containing a metal salt and then drying it to load a particle of the metal salt on the support, (a) wherein a base having a less tendency to adsorb and coordinate to the metal salt particle than ammonia is incorporated into the solution to make the solution basic, and thereby the metal salt particle is caused to have a negative zeta potential; or (b) wherein an acid and a base that adsorbs and coordinates to the metal salt particle are incorporated into the solution to make the solution acidic, and thereby the metal salt particle is caused to have a positive zeta potential.