Systems and methods for providing feed material to a pressurized system

A method for transferring material from a low pressure zone to a high pressure zone comprising:

• (a) providing feed material to a first lock hopper;
• (b) closing a valve coupled to an inlet of said first lock hopper;
• (c) after step (b), providing fluid to said first lock hopper to pressurize the first lock hopper;
• (d) after the first lock hopper is pressurized, opening a valve coupled to an outlet of said first lock hopper, said outlet is in fluid communication with a circulation loop;
• (e) releasing pressurized content of the first lock hopper to the circulation loop, said circulation loop is in fluid communication with an inlet of a first receiving unit;
• (f) providing feed material to a second lock hopper;
• (g) closing a valve coupled to an inlet of said second lock hopper;
• (h) after step (g), providing fluid to said second lock hopper to pressurize the second lock hopper;
• (i) opening a valve coupled to an outlet of said second lock hopper, said outlet is in fluid communication with the circulation loop;
• (j) releasing pressurized content of the second lock hopper to the circulation loop;
• (k) providing at least a portion of pressurized content in the circulation loop to the first receiving unit.