摘要:
Disclosed are a method and a device for biomass gasification by cycling of carbon dioxide without oxygen. Concretely the method and the device are integrated, wherein carbon dioxide is used as the only gasifying agent for gasifying biomass and other solid fuels into high-quality synthesis gas, the carbon dioxide in the synthetic gases is recovered, and the carbon dioxide produced in the succeeding process using the synthetic gases is recycled for gasification. The purpose of zero emission of carbon dioxide of the whole system is achieved. The advantages of no oxygen consumption, the production of high-quality synthesis gas, high cold gas efficiency and simple operation are achieved. Zero emission of carbon dioxide of the whole system is achieved.
摘要:
A microwave plasma biomass entrained flow gasifier comprising a gasifier body (8), a fuel inlet arranged at the lower part of the gasifier body (8), a synthetic gas outlet at the top part of the gasifier body (8), and a slag discharge outlet (10) at the bottom part of the gasifier body (8). Arranged outside the gasifier body (8) is a fuel preprocessing system, comprising a fuel crushing apparatus (1), a sieving apparatus (2) arranged downstream to the fuel crushing apparatus (1), a particle diameter-qualified fuel chamber (3) and a particle diameter-unqualified fuel chamber (4) arranged in parallel and downstream to the sieving apparatus (2), and a gasifier-front chamber arranged downstream to the particle diameter-qualified fuel chamber (3), where the gasifier-front chamber (5) is connected at the bottom part thereof to the gasifier body (8) via a burner. Arranged at the synthesis gas outlet (9) at the top part of the gasifier is a synthesis gas monitoring unit (12). Also provided is a process utilizing the gasifier for biomass entrained flow gasification. The process comprises: 1) a biomass fuel is preprocessed; 2) a microwave plasma working gas is introduced into a plasma generator, excited into plasma then injected into the gasifier; 3) biomass fuel powdery particles are injected into the gasifier via the burner, while at the same time, an oxidizer is fed into the system via an oxygen/steam inlet, injected into the gasifier simultaneously with the biomass fuel, the biomass fuel is subjected to a thermochemical reaction within the gasifier; 4) the temperature and content of the synthesis gas are monitored for implementing adjustments in oxygen flow rate, steam flow rate, and microwave power; the temperature at the synthesis gas outlet is between 900°C and 1200°C; finally, the synthesis gas is drawn out from the synthesis gas outlet at the top part, while at the same time a liquid slag is discharged via the slug discharge outlet.
摘要:
Provided is a method for modifying a biomass pyrolysis oil, which specifically comprises the following steps: a first step of demulsification, layering, and dehydration: adding an inorganic salt ion and an organic demulsifier into the biomass pyrolysis oil, wherein the mass ratio of the inorganic salt to the biomass pyrolysis oil is 1:2000-1:800, the mass ratio of the organic demulsifier to the biomass pyrolysis oil is 1:4000-1:1000, after mixing sufficiently, standing and taking the upper layer of biomass pyrolysis oil; a second step of performing a catalytic cracking modification on the biomass pyrolysis oil: using a modified catalyst: 1) modifying a catalyst: performing an ageing treatment on a carclazyte catalyst supported on a zeolite molecular sieve for 2-8 h with 100% water vapour under the condition of 500-800°C; and 2) placing the aged catalyst into a reactor, injecting the biomass pyrolysis oil into the reactor filled with the catalyst, with a catalyst-to-oil ratio of 1:3-16, and performing a catalytic cracking modification on the biomass pyrolysis oil under the conditions of a mass airspeed of 6-15 h -1 , a reaction temperature of 380-700°C and a reaction pressure of 0.1-0.8 Mpa.
摘要:
An ultra high pressure cooling and purification process and apparatus for an oil production biomass syngas, the process comprising: (1) performing two-stage waste heat recovery and cyclone dust removal processing, with by-products of high pressure and low pressure steam, (2) removing a portion of heavy tar precipitated out from the biomass syngas by cooling in a second stage indirect heat exchange process, (3) further removing dust and lowering a temperature using a washing solution, (4) conducting deep removal of dust and coke using a moist air flow, and purging to remove remaining small amounts of dust and tar fog in the biomass syngas, and causing the pressure thereof to drop to 0.3-1 MPa, so as to obtain a biomass syngas having respective dust and tar fog contents of less then 10 mg/Nm3, and a temperature of
摘要:
A monodisperse transition metal nano-catalyst for Fischer-Tropsch synthesis and a preparation method therefor and an application thereof. The catalyst comprises transition metal. The transition metal is stably dispersed in an organic solvent in the form of monodisperse metal nanoparticles. The particle size of the transition metal is 1-100 nm. The specific surface area of the catalyst is 5-300 m 2 /g. The dispersity of the metal nanoparticles of the catalyst is high, and the catalyst can be directly applied to a Fischer-Tropsch synthesis reaction without filtering, cleaning, high-temperature roasting, and activated reduction.
摘要:
A structured iron-based catalyst for producing an α-olefin from a synthesis gas and a preparation method and use. The catalyst comprises an active component iron, auxiliary agents and a carrier, wherein the auxiliary agents comprise a first auxiliary agent which is a transition metal or a transition metal oxide and a second auxiliary agent which is a metal oxide. The content of the active component iron is 50.0%-99.8%, the content of the first auxiliary agent is 0-5.0%, the content of the second auxiliary agent is 0-10% and the balance is the carrier which is silicon dioxide. A precursor of the active component iron, a precursor of the first auxiliary agent and the carrier silicon dioxide are made into mono-dispersed particles using a heat dispersing method, and then impregnated with a solution of a precursor of the second auxiliary agent to obtain the structured iron-based catalyst. The above-mentioned structured iron-based catalyst is used for producing an α-olefin from a synthesis gas. Since the mono-dispersed structured iron-based catalyst can generate an active centre suitable for the generation of the α-olefin, it thus has good selectivity.
摘要:
An optimized integrated system for solar-biomass hybrid electricity generation. A heat transfer oil outputted from a solar farm (1 and 2) of a solar thermal boiler system flows sequentially through a solar thermal evaporator (6) and a solar thermal heater (5) then back to a heat transfer oil storage tank (4) and is then delivered via a circulation oil pump (3) to the solar farm to complete a heat transfer oil circulation. Solar thermal steam produced by the solar thermal evaporator is delivered to a biomass boiler system (9) via a steam header (7). Auxiliary steam produced by a coal-fired or gas-fired or oil-fired auxiliary boiler (8) also is mixed with the solar thermal steam and delivered to the biomass boiler system via the steam header. The solar thermal mixed steam and steam produced by a biomass boiler itself are delivered to a turbo generator (10) to drive an electric generator (11) into generating electricity. The system simplifies solar thermal power generation system and equipment configurations, provides stable electricity generation, high thermal efficiency, and extended service life.
摘要:
Provided is a high-capacity macromolecular polymer hydrogen storage material, comprising a linear macromolecular polymer as a main chain, and a borane ammonia derivative grafted on the side chain and/or end of the linear macromolecular polymer after a side-chain group and/or end group of the linear macromolecular polymer is aminated by a polyamine compound and reacts with a borohydride. Also provided is a preparation method for the high-capacity macromolecular polymer hydrogen storage material.