Bifunctional biochar-based solid acid catalyst, and preparation method and application thereof
A carbon-based solid acid and bifunctional technology, which is applied in physical/chemical process catalysts, chemical instruments and methods, biofuels, etc., can solve the problems of high requirements for equipment and reaction conditions, poor industrial availability, and time-consuming and energy-consuming reactions. problem, achieve the effect of shortening the reaction time of esterification, stabilizing performance and improving efficiency
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[0017] Example 1
[0018] (1) Weigh a certain amount of Jatropha jatropha seed husks, carry out mechanical pulverization to form solid powders of roughly the same size, wash with deionized water, suction filtration 3 times, and dry at 80°C for 8h;
[0019] (2) The washed and dried Jatropha curcas seed husks were uniformly mixed with ammonium lignosulfonate at a mass ratio of 13:1, and then carbonized at 500°C for 2.5 hours under nitrogen protection to prepare an amino-loaded carbon-based precursor ;
[0020] (3) The amino-loaded carbon-based precursor and the concentrated sulfuric acid in a mass-volume ratio of 1 g: 8 mL were added to the hydrothermal reaction kettle for sulfonation, and heated at 80° C. for 2 h; the sulfonated Jatropha curcas seed husks and The mixture carrier of ammonium lignosulfonate was washed with deionized water until the solution became neutral, and finally it was vacuum-dried at 80°C for 8h to obtain a granular bifunctional biomass carbon-based solid...
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[0022] Example 2
[0023] (1) Weigh a certain amount of Jatropha jatropha seed husks, carry out mechanical pulverization to form solid powders of roughly the same size, wash with absolute ethanol, suction filtration 3 times, and dry at 100°C for 8h;
[0024] (2) the washed and dried Jatropha curcas seed husks are uniformly mixed with ammonium lignosulfonate at a mass ratio of 12:1, and carbonized at 600° C. for 2 h under nitrogen protection to prepare an amino-loaded carbon-based precursor;
[0025] (3) The amino-loaded carbon-based precursor and the oleum in a mass-to-volume ratio of 1g:10mL were added to a distillation reaction device for sulfonation, and heated at 80°C for 3h; the sulfonated Jatropha curcas seed husks were mixed with The mixture carrier of ammonium lignosulfonate was washed with deionized water until the solution became neutral, and finally it was vacuum-dried at 80°C for 8h to obtain a granular bifunctional biomass carbon-based solid acid catalyst;
[002...
Example Embodiment
[0027] Example 3
[0028] (1) Weigh a certain amount of Jatropha jatropha seed husks, carry out mechanical pulverization to form solid powders of roughly the same size, wash with deionized water, suction filtration 3 times, and dry at 80°C for 8h;
[0029] (2) the washed and dried Jatropha curcas seed husks are uniformly mixed with ammonium lignosulfonate in a mass ratio of 8:1, and carbonized at 400° C. for 3 hours under nitrogen protection to prepare an amino-loaded carbon-based precursor;
[0030] (3) The amino-loaded carbon-based precursor and concentrated sulfuric acid in a mass-to-volume ratio of 1 g:15 mL were added to a distillation reaction device for sulfonation, and heated at 100° C. for 3 hours; the sulfonated Jatropha curcas and woody The mixture carrier of ammonium sulfonate was washed with deionized water until the solution became neutral, and finally it was vacuum-dried at 80 °C for 8 hours to obtain a granular bifunctional biomass carbon-based solid acid catal...
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