Disclosed is a process for the one-pot liquefaction of a biomass or coal and a biomass, the process comprising: first preparing a slurry containing a catalyst, a vulcanizing agent and a biomass (and coal), and then introducing hydrogen gas into the slurry to carry out a reaction. Preparing the slurry comprises: subjecting a biomass (and coal) sequentially to drying, a first pulverization, compression and a second pulverization, then mixing same with a catalyst and a vulcanizing agent to obtain a mixture, and adding the mixture to an oil product for grinding and pulping to obtain a biomass slurry. By means of the treatment process of subjecting the straw firstly to compression and then to a second pulverization, the volume of the straw is greatly reduced, thereby facilitating the dispersion thereof in the oil product.

Coal fines are processed by flotation separation to separate coal particles from ash-forming mineral content particles. Coal fines are mixed water under high shear mixing conditions to form an aqueous slurry of coal fines containing between 15 wt. % and 55 wt. % coal fines. The aqueous slurry is introduced into a coal flotation cell to separate coal particles from ash-forming mineral content particles by flotation separation, wherein the coal fines have a particle size less than 100 m, and more preferably less than 50 m. Bubbles are generated in the coal flotation cell having a bubble size and bubble quantity selected to float the coal particles and to form a coal-froth containing at least 15 wt. % solid particles. The solid particles include coal particles and ash-forming mineral content particles. The coal-froth is collected for further processing.

The coal-derived solid hydrocarbon particles are discrete particles of coal-derived carbonaceous matter having a particle size less than about 10 m that are substantially free of inherent or entrained mineral matter. The particles of have an average particle size in the range from 1 m to 8 m. The particles of coal-derived carbonaceous matter are milled to a size approximately the same as a size of coal-derived mineral matter inherent in the coal source to release inherent coal-derived mineral matter particles such that the particles of carbonaceous matter and the particles of mineral matter are discrete and separable solid particles. Following separation, less than 1.5 wt. % discrete coal-derived mineral matter particles are associated with the discrete particles of coal-derived carbonaceous matter. Particles of coal-derived solid hydrocarbon matter are blended with a gaseous or liquid hydrocarbon fuel to form a two-phase hydrocarbon fuel feedstock.

The coal-derived solid hydrocarbon particles are discrete particles of coal-derived carbonaceous matter having a particle size less than about 10 m that are substantially free of inherent or entrained mineral matter. The particles of have an average particle size in the range from 1 m to 8 m. The particles of coal-derived carbonaceous matter are milled to a size approximately the same as a size of coal-derived mineral matter inherent in the coal source to release inherent coal-derived mineral matter particles such that the particles of carbonaceous matter and the particles of mineral matter are discrete and separable solid particles. Following separation, less than 1.5 wt. % discrete coal-derived mineral matter particles are associated with the discrete particles of coal-derived carbonaceous matter. Particles of coal-derived solid hydrocarbon matter are blended with a gaseous or liquid hydrocarbon fuel to form a two-phase hydrocarbon fuel feedstock.

The lifetime of artificial lift systems, such as progressing cavity pumps (PCPs), used to transport aqueous slurries which contain fine particles, e.g. coal fines, may be prolonged by incorporation of at least one dispersant in the slurries. The dispersants act to inhibit or prevent the fine particles from agglomerating to plug the artificial lift intake and/or inhibit or prevent the agglomerated coal fines settling above the artificial lift system. The dispersant may also improve the lubricity of the slurry.

Disclosed is a process for the one-pot liquefaction of a biomass or coal and a biomass, the process comprising: first preparing a slurry containing a catalyst, a vulcanizing agent and a biomass (and coal), and then introducing hydrogen gas into the slurry to carry out a reaction. Preparing the slurry comprises: subjecting a biomass (and coal) sequentially to drying, a first pulverization, compression and a second pulverization, then mixing same with a catalyst and a vulcanizing agent to obtain a mixture, and adding the mixture to an oil product for grinding and pulping to obtain a biomass slurry. By means of the treatment process of subjecting the straw firstly to compression and then to a second pulverization, the volume of the straw is greatly reduced, thereby facilitating the dispersion thereof in the oil product, increasing the concentration of the reaction material, and improving the delivery amount of the biomass per unit time by means of a pump; Furthermore, the conversion rate of the biomass is also improved.

Oxycombustion process wherein a combustor is fed with a fuel, a comburent and compounds under the form of coherent aggregates having Young modulus 10.sup.4 MPa, the combustor being isothermal and flameless.

A system for preparing a coal water slurry, comprising: a first unit for providing a stream of coarse coal water slurry; a second unit for providing a stream of fine coal water slurry; a concentration unit for receiving a portion of at least one of the stream of coarse coal water slurry and the stream of fine coal water slurry, and, providing a concentrated stream having a higher coal concentration than the portion of at least one of the stream of coarse coal water slurry and the stream of fine coal water slurry; and a mixing unit for mixing the concentrated stream and the remaining portions of the stream of coarse coal water slurry and the stream of fine coal water slurry. An associated method is also presented.

A biomass fuel slurry includes a mixture of a biomass material and a plastic material suspended in water. In other embodiments, the biomass fuel slurry also includes coal. A method of making a biomass fuel slurry includes the steps of encapsulating a biomass material with a plastic material to produce a plastic encapsulated biomass material and suspending the plastic encapsulated biomass material in water.

Provided is a concentration device for coal water slurry, belonging to the technical field of coal water slurry preparation equipment, including a grinding shell, where a grinding mechanism is connected in the grinding shell. A lower part of the grinding shell is connected to a filter unit, where the filter unit is correspondingly arranged with a discharge port of the grinding mechanism. A lower part of the filter unit is correspondingly provided with a pulverized coal particle size distribution mechanism. An outlet end of the pulverized coal particle size distribution mechanism is communicated with a stirrer. The grinding mechanism includes a first bracket, where the first bracket is fixedly connected to inner side walls of the grinding shell. The first bracket is connected with step-by-step grinding units, a first adjusting unit and two second adjusting units.