Study On The Multi-generation Model Of Hot And Cold Electricity Based On Straw Thermal Conversion

In this paper,the pyrolysis experiment was carried out with straw crops as experimental objects,and pyrolysis experiments were carried out with toluene as a simulated compound of tar.The effects of pyrolysis temperature,catalyst type,catalyst calcination temperature on the composition and yield of pyrolysis gas products were investigated.The gas obtained from the experiment was simulated using Aspen Plus software.The experimental results show that the main process of straw pyrolysis is dehydration,devolatilization and pyrolysis;the main components of gas obtained after straw pyrolysis are CO,H2 and CH4.The main components of the gas obtained after pyrolysis of toluene are also CO,H2 and CH4.Aseries of different types of catalysts(Ni-GA,Ni/Ce-GA,Ni/La-GA,etc.)were synthesized by precipitation deposition.The catalytic reforming performance of different types of catalysts on straw at different pyrolysis temperatures was investigated by a tube fixed bed pyrolysis furnace.The results show that the loading effect of the catalytically active component is good,and the active component is uniformly dispersed on the surface of the carrier.In the XRD spectrum,the peak intensity of the corresponding metal oxide is obvious,and the BET specific surface area and pore volume are larger,mechanical strength better.The experimental results show that the three types of catalysts have good catalytic performance,and the catalytic effect of Ni/La-GA is the better.Different types of nano-type nickel-based catalysts(Ni-HA,Ni/Fe-HA,Ni/Ce-HA,etc.)were synthesized by precipitation deposition method.Calcination at different temperatures was investigated in a tube fixed bed pyrolysis furnace.The performance of catalytic cracking of different types of catalysts for tar simulants(toluene)at different pyrolysis temperatures.The characterization results show that the loading of the active component is in accordance with the theoretical loading.It can be seen from the SEM image that the particle size of the catalyst belongs to the nanometer scale,and the Ni/Ce active component is most uniformly dispersed on the surface of the carrier,and the BET result shows that the specific surface area of the halloysite carrier is large,because the halloysite is naturally curled,so the active component has a good loading on both the inner and outer surfaces.It is shown in the XRD spectrum that the metal oxide has a large peak intensity and a good surface load effect.The experimental results show that the calcination temperature and pyrolysis temperature of the catalyst have a great influence on the catalytic cracking of toluene,and the conversion of toluene is very high,and the stability of the catalyst is strong.Different types of alkali metal catalysts(Na2CO3-GA,K2CO3-GA,Li2CO3-GA,etc.)were synthesized by impregnation.The catalytic cracking performance of the alkali metal catalyst tar simulants(toluene)was investigated a tube fixed bed pyrolysis furnace.SEM showed that the alkali metal after calcination showed scales on the surface of the support.XRD showed that the loading effect of the alkali metal catalyst was good.The experimental results showed that the alkali metal toluene had a certain catalytic cracking effect,but the effect is not as good as the nickel-based catalyst.In the CCHP system,a flow chart of the process system of straw thermal conversion cold and heat electricity continuous generation technology was established,and the above experimental results were simulated by Aspen Plus software.The results show that the cost of producing electricity for one watt of straw is 1.4 RMB.The cost of boiling a pot of water is 0.35 RMB,the cost of air conditioning electricity is 26.5 RMB/day,and the cost of home heating is 7.5 RMB/square.