R&D company which adds value to the circular economy by developing plant for converting non-recyclable waste into clean energy.

Croatian R&D company - DOK-ING's internal startup

Indeloop is a Croatian R&D company that designs, develops and builds proprietary gasification systems that provide environmentally friendly, sustainable solutions for non-recyclable organic materials (mostly waste), carbon emission reduction and production of clean energy.

These systems aim to make end users energy self-sustainable while dealing with the problem of organic material disposal. The company is a member of DOK-ING Group, the world’s leader in producing special purpose robotics (mining, demining, safety). DOK-ING Group also operates and has branches in North America, Africa & Asia. In more than 30 years of being in the business, the Group has been recognized for changing the industrial landscape with its innovative approach and won many international “doing business and industrial” awards in innovations and technologies.

Indeloop’s team consists of experts in mechanical engineering, chemical engineering, energy engineering and hydrogen value chain.


Indeloop’s main innovation is a gasification system that uses thermal energy to convert organic material into syngas (hydrogen) and carbon black. Almost any organic material can be used as feedstock for the system, once Indeloop’s team has adjusted the system design and parameters for the optimal gasification process. The company develops and builds systems in two sizes – systems that can process 25 or 6 tonnes of organic material per day. The syngas produced in the plant can be used for heating, electricity or hydrogen production. The byproduct, carbon black, can be used in the different industries (e.g. construction industry) if its properties meet the required criteria. The system is energy self-sustainable because the fuel required for gasification comes from a portion of the syngas produced in the plant. The processes in the system come with no or negligible greenhouse gas emissions.


The first step in the conversion of organic material into syngas is the preparation of the feedstock. The material can be shredded, dried and separated according to the customer’s requirements. Secondly, the organic material enters the central part of the reactor through a dosing system, which prevents the absorption of oxygen to minimise the production of greenhouse gases. The material is slowly conveyed through the reactor by a hollow screw conveyor. The heat required for gasification comes from the burner flue gases after they pass through the afterheater. These flue gases circulate in the reactor. After the material has been gasified in the reactor and the carbon black and syngas have been produced, the syngas is sent to the afterheater, where high temperatures break down the remaining heavy hydrocarbons to maximise hydrogen production.

Carbon black is separated out of the system for further use. At the end of the overheating, syngas flows through the centre of the hollow screw conveyor in the reactor and releases the heat to the material inside. The following step consists of cooling the syngas and cleaning it in cyclones and scrubbers to remove all unwanted particles and gases in the syngas. In the end, part of the syngas produced is used for system heating in the burner, which is connected to the afterheater. Most of the gas can be used for other purposes – hydrogen production in PSA or for heat and electricity production.


About development

Indeloop developed waste2energy plant to enable its end-users to be energy self-sufficient while tackling the problem of non-recyclable organic material waste management. The crisis in the energy sector and the EU’s energy and hydrogen strategy showed that the company is on the right path to the future because our waste2energy plant offers a solution to the current problems while being environmentally friendly

    Get in touch


    Slavonska avenija 22 G,
    10000 Zagreb, HR


    +385 1 2481-303