# PyrolysisPlant.com > The complete guide to pyrolysis plants — cost, ROI, technology, and a worldwide > directory of pyrolysis companies. Published by APChemi (apchemi.com), a pyrolysis > technology company with 17+ years of experience, 49+ commercial projects, 12+ > patents, and ISCC PLUS certification. For project enquiries: https://www.apchemi.com/contact ## Core guides - [What Is Pyrolysis?](https://pyrolysisplant.com/what-is-pyrolysis/): process, types (slow/fast/flash), products, yields by feedstock - [Pyrolysis Plant Cost](https://pyrolysisplant.com/cost/): cost by capacity, feedstock, region; operating costs; ROI - [Pyrolysis Plant Manufacturers](https://pyrolysisplant.com/manufacturer/): how to evaluate vendors, 22 red flags - [Pyrolysis Plant Design](https://pyrolysisplant.com/design/): 5 design phases from concept to build - [ROI Calculator](https://pyrolysisplant.com/guides/roi-calculator/): free IRR/NPV/payback financial model - [Feasibility Study Guide](https://pyrolysisplant.com/guides/feasibility/) - [Business Plan Guide](https://pyrolysisplant.com/guides/business-plan/) - [Environmental Impact](https://pyrolysisplant.com/guides/environmental-impact/) - [FAQ](https://pyrolysisplant.com/faq/): 37 expert answers ## Plant types - [Biomass Pyrolysis](https://pyrolysisplant.com/types/biomass/): biochar yields and carbon credits - [Tire Pyrolysis](https://pyrolysisplant.com/types/tire/): yields, products, profitability - [Plastic Pyrolysis](https://pyrolysisplant.com/types/plastic/): 6 plastic types ranked by yield - [Continuous Pyrolysis](https://pyrolysisplant.com/types/continuous/) - [Batch Pyrolysis](https://pyrolysisplant.com/types/batch/): entry-level guide for 1-10 TPD ## Technology & services - [Biochar & Carbon Removal (CDR)](https://pyrolysisplant.com/technology/biochar-cdr/) - [Pyrolysis Oil Purification](https://pyrolysisplant.com/technology/oil-purification/) - [Chemical Recycling](https://pyrolysisplant.com/technology/chemical-recycling/) - [ISCC PLUS Certification](https://pyrolysisplant.com/technology/iscc-certification/) - [EPR Compliance](https://pyrolysisplant.com/technology/epr/) - [CFD & FEA Simulations](https://pyrolysisplant.com/services/simulations/) - [Plant Troubleshooting](https://pyrolysisplant.com/services/plant-troubleshooting/) - [Project Management Consultancy](https://pyrolysisplant.com/services/pmc/) - [R&D / Lab Testing](https://pyrolysisplant.com/services/rd-lab-testing/) ## Directory - [Pyrolysis Companies Directory](https://pyrolysisplant.com/directory/): 1,400+ companies across 125 countries, searchable by country and feedstock ## About - [About APChemi](https://pyrolysisplant.com/about/): credentials, awards, track record - [Quality & Certifications](https://pyrolysisplant.com/quality-certifications/): ISCC PLUS, ISO 9001, ATEX, CE - [Case Studies](https://pyrolysisplant.com/case-studies/): 9 real projects with outcomes - [Blog](https://pyrolysisplant.com/blog/)