The present disclosure relates to an integrated process for the production of formaldehyde-stabilized urea, starting with producing synthesis gas and including the preparation of methanol, ammonia, urea, and formaldehyde in amounts appropriate for the final product.

Methods and systems are disclosed for using industrial waste for the production of hydrogen gas. The method includes examining a pH level of the industrial waste, removing contaminate from the industrial waste, conditioning and concentrating the industrial waste to a proton-rich solution, and using the resulting proton-rich solution as the proton source in a hydrogenase catalyzed hydrogen production system.

Methods and systems are disclosed for using industrial waste for the production of hydrogen gas. The method includes examining a pH level of the industrial waste, removing contaminate from the industrial waste, conditioning and concentrating the industrial waste to a proton-rich solution, and using the resulting proton-rich solution as the proton source in a hydrogenase catalyzed hydrogen production system.

The present disclosure relates to a hydrogen purification/storage apparatus and method using a liquid organic hydrogen carrier (LOHC).

The present disclosure relates to a hydrogen purification/storage apparatus and method using a liquid organic hydrogen carrier (LOHC).

Provided is a liquid hydrogen storage material including 1,1-biphenyl and 1,1-methylenedibenzene, the liquid hydrogen storage material including the corresponding 1,1-biphenyl and 1,1-methylenedibenzene at a weight ratio of 1:1 to 1:2.5. The corresponding liquid hydrogen storage material has excellent hydrogen storage capacity value by including materials having high hydrogen storage capacity, and is supplied in a liquid state, and as a result, it is possible to minimize initial investment costs and the like required when the corresponding liquid hydrogen storage material is used as a hydrogen storage material in a variety of industries.

Provided is a liquid hydrogen storage material including 1,1-biphenyl and 1,1-methylenedibenzene, the liquid hydrogen storage material including the corresponding 1,1-biphenyl and 1,1-methylenedibenzene at a weight ratio of 1:1 to 1:2.5. The corresponding liquid hydrogen storage material has excellent hydrogen storage capacity value by including materials having high hydrogen storage capacity, and is supplied in a liquid state, and as a result, it is possible to minimize initial investment costs and the like required when the corresponding liquid hydrogen storage material is used as a hydrogen storage material in a variety of industries.

A process for the production of formaldehyde-stabilised urea is described comprising the steps of: (a) generating a synthesis gas comprising hydrogen, nitrogen, carbon monoxide, carbon dioxide and steam in a synthesis gas generation unit; (b) recovering carbon dioxide from the synthesis gas to form a carbon dioxide-depleted synthesis gas; (c) synthesising methanol from the carbon dioxide-depleted synthesis gas in a methanol synthesis unit and recovering the methanol and a methanol synthesis off-gas comprising nitrogen, hydrogen and residual carbon monoxide; (d) subjecting at least a portion of the recovered methanol to oxidation with air in a formaldehyde production unit; (e) subjecting the methanol synthesis off-gas to methanation in a methanation reactor containing a methanation catalyst to form an ammonia synthesis gas; (f) synthesising ammonia from the ammonia synthesis gas in an ammonia production unit and recovering the ammonia; (g) reacting a portion of the ammonia and at least a portion of the recovered carbon dioxide stream in a urea production unit to form a urea stream; and (h) stabilising the urea by mixing the urea stream and a stabiliser prepared using formaldehyde recovered from the formaldehyde production unit, wherein a source of air is compressed and divided into first and second portions, the first portion is provided to the formaldehyde production unit for the oxidation of methanol and the second portion is further compressed and provided to the synthesis gas generation unit.

In a method for cooling a hot synthesis gas containing at least one condensable constituent part, in particular tar, during which the synthesis gas in a multi-stage cooling process passes through a first cooling stage, a second cooling stage and a third cooling stage one after the other and the synthesis gas after an at least partial cooling is at least subjected to a separation step for separating the at least one condensable constituent part, the synthesis gas is cooled in the first cooling stage to a temperature above the condensation temperature of the at least one condensable constituent part and the second cooling stage comprises the recirculating of a part quantity of synthesis gas branched off after the third cooling stage and the at least one separation step into the synthesis gas flow.

In a method for cooling a hot synthesis gas containing at least one condensable constituent part, in particular tar, during which the synthesis gas in a multi-stage cooling process passes through a first cooling stage, a second cooling stage and a third cooling stage one after the other and the synthesis gas after an at least partial cooling is at least subjected to a separation step for separating the at least one condensable constituent part, the synthesis gas is cooled in the first cooling stage to a temperature above the condensation temperature of the at least one condensable constituent part and the second cooling stage comprises the recirculating of a part quantity of synthesis gas branched off after the third cooling stage and the at least one separation step into the synthesis gas flow.