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Catalyst for catalyzing solid combustible gasification tar to crack
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A tar cracking and catalyst technology, applied in the fields of energy and environment, can solve problems such as waste of valuable metals and environmental pollution, and achieve the effects of reducing preparation and use costs, high mechanical strength, and good economic and environmental benefits.
Inactive Publication Date: 2019-12-20
KUNMING UNIV OF SCI & TECH
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Problems solved by technology
The discharge or stockpiling of nickel smelting slag not only causes serious environmental pollution, but also causes a large amount of waste of valuable metals. How to realize the resource utilization of nickel smelting slag is a prominent problem at present
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Embodiment 1
[0022] Example 1: This example catalyst nickel flash smelting slag, its composition is Fe: 39.20%, SiO 2 : 33.50%, CaO: 2.40%, MgO: 7.90%, Ni: 0.26%, Cu: 0.16%.
[0023] The catalyst of this example is used to catalyze the gasification tar cracking of municipal solid waste. The catalyst is placed in a fixed-bed reactor, and the tar enters the fixed-bed reactor under nitrogen. The mass ratio of tar to catalyst is 10:1, and the catalytic cracking reaction When the temperature is 800°C, the conversion rate of tar is 38%.
Embodiment 2
[0024] Example 2: The catalyst in this example is activated nickel flash smelting slag, wherein the composition of nickel flash smelting slag is Fe: 39.20%, SiO 2 : 33.50%, CaO: 2.40%, MgO: 7.90%, Ni: 0.26%, Cu: 0.16%, the activation method is as follows:
[0025] (1) Put the nickel flash smelting slag in a crusher to crush it, sieve it to obtain particles with a particle size of 20 mesh, and then dry it at a temperature of 105°C for 12 hours to remove moisture;
[0026] (2) The dried nickel flash smelting slag was calcined at 1000° C. for 5 hours in an air atmosphere to obtain an activated nickel smelting slag catalyst.
[0027] The nickel flash smelting slag activated in this example is used to catalyze the gasification tar cracking of municipal solid waste. The catalyst is placed in a fixed bed reactor, and the tar enters the fixed bed reactor under nitrogen. The mass ratio of tar to catalyst is 10 :1, when the catalytic cracking reaction temperature was 800°C, the tar con...
Embodiment 3
[0028] Example 3: The catalyst in this example is activated nickel flash smelting slag, wherein the composition of nickel flash smelting slag is Fe: 39.20%, SiO 2 : 33.50%, CaO: 2.40%, MgO: 7.90%, Ni: 0.26%, Cu: 0.16%, the activation method is as follows:
[0029] (1) Put nickel flash smelting slag in a crusher to crush, screen out particles with a particle size of 40 mesh, and then dry at a temperature of 150°C for 24 hours to remove moisture;
[0030] (2) Put the dried nickel flash smelting slag into the catalyst activation reactor, and feed a mixed gas of hydrogen and nitrogen, wherein the volume percentage of hydrogen is 50%, and reduce it at 900°C for 6 hours to obtain the activated nickel smelting slag catalyst;
[0031] The activated nickel flash smelting slag is used to catalyze municipal solid waste gasification tar cracking, the catalyst is placed in a fixed-bed reactor, and the tar enters the fixed-bed reactor under nitrogen carrying, and the mass ratio of tar to c...
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Abstract
The invention relates to a catalyst for catalyzing solid combustible gasification tar to crack and belongs to the technical fields of energy and environments. The catalyst is nickelsmeltingslag generated in various nickelsmelting processes and technical processes of nickelflash smeltingslag, converter slag, ore smelting electric furnace slag and the like or activated nickel smelting slag which is obtained by calcining and activating nickel smelting slag at an air, oxygen-rich, pure-oxygen or vapor atmosphere after crushing, sieving and drying the nickel smelting slag, reducing and activating the nickel smelting slag at the atmosphere of a reducing gas and inert gas mixture and carrying out activating treatment at the atmosphere of a combustible gas generated by gasifying a solid combustible. By using the method, the recycle of the nickel smelting slag is realized, a prepared nickel smelting slag catalyst is stable in properties, good in safety, high in mechanical strength and capable of remarkably reducing the preparation and use costs of a tarcracking catalyst, a cheap catalyst is provided for the catalytic crack of the solid combustible gasification tar, and the catalyst has relatively high economic and environmental benefits.
Description
technical field [0001] The invention relates to a nickel smelting slag catalyst for catalyzing the gasification tar cracking of solid combustibles and an activation method thereof, belonging to the technical field of energy and environment. Background technique [0002] At present, the methods of resource utilization of solid combustibles mainly include direct combustion, pyrolysis and gasification. Gasification is the process of thermochemically treating solid combustibles and obtaining combustible gases. The main component of combustible gases is H 2 , CO, CH 4 , CO 2 and N 2 Wait. The gasification treatment of solid combustibles can improve the utilization efficiency of resources and reduce the emission of pollutants, which has obvious advantages compared with incineration. The high-grade gas produced by the gasification of solid combustibles can be directly used as fuel, or further synthesized into liquid fuel or other chemicals. [0003] Tar is an unavoidable by-p...
Claims
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Application Information
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